Answer:
1) Van der rcf generator
2) the charge is distributed among all the hairs, as they all have the same potential,
the charges are of the same sign repel each other
Explanation:
1.) The object is a Van der rcf generator, which is loaded by friction,
The girl has no load
2) when the girl touches the sphere of the generator part of the electrons of this is transferred to the girl, when this charge reaches the hair, the charge is distributed among all the hairs, as they all have the same potential,
the charges are of the same sign repel each other
A flat sheet of paper of area 0.450 m2 is oriented so that the normal to the sheet is at an angle of 600 to a uniform electric field of magnitude 18 N C-1. What is the magnitude of the electric flux through the sheet? A. 3.22 N m2 C-1 B. 21.42 N m2 C-1 C. 5.04 N m2 C-1 D. 11.72 N m2 C-1 E. 4.05 N m2 C
The magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹ (Option E).
The electric flux through a surface is given by the product of the electric field strength and the area of the surface projected perpendicular to the electric field.
In this case, the electric field strength is 18 N C⁻¹, and the area of the sheet projected perpendicular to the electric field is 0.450 m²
(since the normal to the sheet makes an angle of 60° with the electric field). Multiplying these values gives the electric flux:
Electric flux = Electric field strength × Area
Electric flux = 18 N C⁻¹ × 0.450 m²
Electric flux = 8.1 N m² C⁻¹
In summary, the magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹. This value is obtained by multiplying the given electric field strength by the projected area of the sheet perpendicular to the electric field.
The angle of 60° is taken into account to determine the effective area for calculating the flux.(Option E).
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What percentage of an iron anchor’s weight will be supported by buoyant force when submerged in salt water?
Answer:
0.87
Explanation:
To solve this, we use the principle of Archimedes. Archimedes Principal of flotation states that "the buoyant force of an object is equal to the total weight of the fluid it displaces."
In the attachment, I stated the mathemacal formula, of which
F(B) = The buoyant force
w(fl) = The weight of the salt water displaced
p(iron) = density of iron
p(salt) = density of the salt water = 1025 kg/m³
F' = weight of the iron in air
F = weight of the iron in salt water
p(man) = density of man = 7680 kg/m³
The rest are the easy calculations done by substituting the values
Name the type of component through which current only flows in one direction.
The Mars Rover Curiosity has a mass of 900 kg. Taking the gravitational field strength to be 9.8 N/kg
on Earth and 3.7 N/kg on Mars, give the value of the weight of the Rover on earth and mars
The weight of the Mars Rover Curiosity on Earth and on Mars is 8820 N and 3330 N respectively.
Weight of objects on Earth and on MarsThe weight of an object is given by the product of its mass and the gravitational field strength at its location.
On Earth:
Weight = mass x gravitational field strengthWeight = 900 kg x 9.8 N/kgWeight = 8820 NOn Mars:
Weight = mass x gravitational field strengthWeight = 900 kg x 3.7 N/kgWeight = 3330 NTherefore, the weight of the Mars Rover Curiosity on Earth and on Mars are 8820 N and 3330 N respectively.
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The above stress can be also approximated by a sinusoidal function (i.e. sine wave) with an average 3,811 kPa, amplitude 430 kPa, and a frequency of 6 Hz. At a second flight condition, the stress had an additional sinusoidal component (i.e., in addition to the first sine wave above). This second component is caused by half the amount of forces (relative to the first condition), has three times the frequency, and 90 degrees out of phase (leading). Determine the average of the second sinusoidal component in kPa. (Provide the answer using 2 decimal places).
Answer:
306.08 kPa
Explanation:
Given data
Average stress of first wave = 3811 kPa
amplitude of first wave ( A1 ) = 430 kPa
Frequency of first wave = 6 Hz
Determine the average stress of the second sinusoidal component in kPa
Amplitude of the additional wave (A2add) = \(\frac{A1}{2}\) = 430 / 2 = 215 kPa
next we will determine the resultant amplitude of the second wave
A2 = \(\sqrt{A^{2} _{1} } + A^{2} _{2add} + 2A_{1}A_{2add} Cos\alpha\)
= \(\sqrt{430^2+ 215^2 + 2(430*215) * cos 90}\)
= \(\sqrt{184900 + 46225 }\)
= \(\sqrt{231155}\) = 480.79
hence the average stress of the second sinusoidal component
= \(\frac{2A_{2} }{\pi }\)
= \(\frac{2 * 480.79 }{\pi }\) = 306.08 kPa
A marble with a mass of .4 kg is rolling down a ramp at a speed of 5 m/s and collides with a .25 kg marble sitting at rest. What is the final velocity of the first marble?
Students monitor the progress of a marble by measuring its speed and distance travelled. They calculate the speed using the formula Speed = Distance / Time.
How do you find the velocity of a marble?
Look for a space on the table or counter that is larger than a metre.Two books should be placed on one end of the desk.Then, lean the grooved ruler against the books.Place a different book at each end of the desk. The marble will come to a halt as a result of this book.Measure the distance between the book's one end and the end of the grooved ruler on the desk. The projected rolling distance of the marble is. Pay attention to the length here.Install the stopwatch.Roll the marble down the grooved ruler and begin timing.The stopwatch should start timing the moment the stone touches the table. Look up time tracking that is easily accessible.Keep track of the distance travelled.Using the equation Speed = Distance / Time, calculate the speed in metres per second. It will be necessary to convert from centimeters to metres.2 more times through #6-#10.The results of the three speed computations should be averaged.To learn more about marble's progress refer to:
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A catcher catches a baseball (m = 145 g) traveling at a speed of 42.5 m/s. How much work was done on the baseball to bring it to rest?
The net work done on the baseball to bring it to rest is -130.953 J or approximately 131 J. The negative sign indicates that the force has been applied opposite to the direction of motion of the baseball.
What is the work-kinetic energy theorem ?The work-kinetic energy theorem states that an object's change in kinetic energy is equivalent to the work that has been done on it.
\(W_{net} = KE_{f} -KE_{i}\)
Here,
\(W_{net}\) = Net work done
\(KE_{f}\) = Final Kinetic Energy
\(KE_{i}\) = Initial Kinetic Energy
We know,
\(KE = \frac{1}{2} mv^{2}\)
Here, m = Mass of the object
v = velocity of the object
Now,
\(W_{net} = KE_{f} -KE_{i}\\W_{net}= \frac{1}{2} mv^{2}_{f} - \frac{1}{2} mv^{2}_{i}\)
Given,
Mass of baseball (m) = 145g = 0.145 kg
Initial velocity (\(v_{i}\)) = 42.5 m/s
Final velocity (\(v_{f}\)) = 0 m/s (since, the baseball comes to rest.)
Inserting these values in the above equation we get,
\(W_{net}= \frac{1}{2} mv^{2}_{f} - \frac{1}{2} mv^{2}_{i}\\ = 0- \frac{1}{2} *0.145*42.5*42.5 \\= -130.953\)
Hence, the net work done on the baseball to bring it to rest is -130.953 J or approximately 131 J.
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You put your book on the bus seat next to you. When the bus stops suddenly the book slides forward off the seat. Why?
A.) The book received a push from the seat hitting it.
B.) The force applied by the bus caused it to accelerate forward.
C.) The book's inertia carried it forward.
D.) The book could never slide forward to begin with.
Answer:
C) The book's inertia carried it forward.
When the bus stops suddenly, the book tends to remain in motion due to its inertia. The book was at rest on the seat of the bus, and when the bus stopped suddenly, the book continued moving forward with the same speed and direction it had before the bus stopped. As a result, the book slid off the seat and onto the floor.
A candle is placed in front of a concave mirror as it is shown . State the image characteristics (SALT)
As a result, the picture behind the mirror is virtual, upright, and enlarged.
What does SALT in concave mirrors stand for?You will find that the properties of an image (SALT) created in a concave mirror depend on the object's position. A) if the item is larger than C. Size, attitude, and location are all important considerations.
The image will be true, but reversed and much reduced. To obtain a crisp flame image, move the burning candle towards the mirror while moving the screen away from it. The size of the inverted picture grows.
Concave mirrors may create both physical and virtual images. A virtual and enlarged picture is produced when the item gets closer to the mirror. When the item is placed further away from the mirror,.
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If the monitoring instrument develops an inability to average, steps to take would include all the following except:?
O Posterior tribal and ulnar nerves
O An electrical stimulation is required to pace the stimulus
O Consult with the anesthesiologist anesthesia changes
O An increase in latencies and a decrease in amplitudes
When the monitoring instrument develops an inability to average, steps need to be taken including all except C: 'Consult with the anesthesiologist anesthesia changes'.
Anesthesiologists are medical doctors like family doctors and surgeons. They specialize in pain management, anesthesia care, and critical care medicine as well as have the knowledge vital to understanding and treating the human body as a whole.
So when the monitoring instrument develops an inability to average, there is no need to consult with the anesthesiologist. The required steps that need to be taken would include:
monitoring posterior tibial and ulnar nervesprovide electrical stimulation to pace the stimulusincreasing in latencies and decreasing in amplitudesYou can learn more about Anesthesiologists at
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You are driving home from school St at 97 km/h for 190 km and then it begins to rain and you slow to 61 km/h instantly you arrive home after five hours how far is your hometown from school
The distance of your hometown from school is 318.64 km.
Given data
Distance S = 190 km
Speed v = 97 km / h
Now, the time taken to travel S distance is calculated as,
t = S / v
t = 180 / 95
t = 1.958 hrs
Now, the total time is given as
Total time T = 4.0 h
So, remaining time t ' = T - t = 4 hrs - 1.958 hrs = 2.042 hrs
Now, the velocity after travel 190 km is v ' = 63 km/ h
Distance travel in this velocity S ' = v ' t '
= 128.6 km
Now, the distance of your hometown from school , S " = S + S '
= 190 km + 128.6 km = 318.64 km
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A 29.0 kg beam is attached to a wall with a hi.nge while its far end is supported by a cable such that the beam is horizontal.
If the angle between the beam and the cable is θ = 57.0° what is the vertical component of the force exerted by the hi.nge on the beam?
The tension in the cable is 169.43 N and the vertical component of the force exerted by the hi.nge on the beam is 114.77 N.
Tension in the cableApply the principle of moment and calculate the tension in the cable;
Clockwise torque = TL sinθ
Anticlockwise torque = ¹/₂WL
TL sinθ = ¹/₂WL
T sinθ = ¹/₂W
T = (W)/(2 sinθ)
T = (29 x 9.8)/(2 x sin57)
T = 169.43 N
Vertical component of the forceT + F = W
F = W - T
F = (9.8 x 29) - 169.43
F = 114.77 N
Thus, the tension in the cable is 169.43 N and the vertical component of the force exerted by the hi.nge on the beam is 114.77 N.
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Select the correct answer.
A boat moves 60 kilometers east from point A to point B. There, it reverses direction and travels another 45 kilometers toward point A. What are the total
distance and total displacement of the boat?
O A.
OB.
O C.
O D.
The total distance is 105 kilometers and the total displacement is 45 kilometers east.
The total distance is 60 kilometers and the total displacement is 60 kilometers east.
The total distance is 105 kilometers and the total displacement is 15 kilometers east.
The total distance is 60 kilometers and the total displacement is 45 kilometers east.
The total distance is 105 kilometers and the total displacement is 15 kilometers east. Option C
How to solve for the total distanceTo calculate the total distance, we add the distances traveled in each leg of the journey: 60 kilometers (from A to B) + 45 kilometers (from B back to A) = 105 kilometers.
However, displacement refers to the change in position of an object in a straight line from its starting point to its ending point. In this case, since the boat starts and ends at the same point (A), the total displacement is zero.
Hence The total distance is 105 kilometers and the total displacement is 15 kilometers east.
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What is the difference between special relativity and general relativity? Briefly describe each theory and cite one piece of evidence supporting each theory.
Special relativity and general relativity are both theories proposed by Albert Einstein. Special relativity deals with the laws of physics in the absence of gravity, while general relativity extends special relativity to include gravity and explains the curvature of spacetime caused by mass and energy.
Special relativity, proposed in 1905, deals with the laws of physics in the absence of gravitational fields. It introduces the concepts of time dilation and length contraction, stating that the laws of physics are the same for all observers moving at constant speeds relative to each other.
One piece of evidence supporting special relativity is the famous Michelson-Morley experiment, which failed to detect the existence of the hypothetical luminiferous aether.
On the other hand, general relativity, formulated in 1915, is an extension of special relativity that incorporates gravity. It postulates that gravity arises from the curvature of spacetime caused by mass and energy. General relativity explains the motion of celestial bodies, the bending of light in the presence of massive objects, and phenomena like black holes.
One piece of evidence supporting general relativity is the observed gravitational redshift, where light emitted from a source in a strong gravitational field is shifted to longer wavelengths.
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12. A baseball (m = 0.14 kg) with initial velocity of -40 m/s (90 mph) is hit. It leaves the bat with a velocity of 60m/s after 0.001s. What is the impulse and average net force applied to the ball by the bat?
Answer:
the impulse is 14 kg-m/s and the net force applied is 14000 N
Explanation:
Given that,
The mass of a baseball, m = 0.14 kg
Initial velocity of the baseball, u = -40 m/s
Final velocity, v = 60 m/s
Time, t = 0.001 s
We need to find the impulse and average net force applied to the ball by the bat.
Impulse = change in momentum
i.e.
J = m(v-u)
J = 0.14 × (60-(-40))
J = 14 kg-m/s
Now,
J = Ft
F is average force applied to the ball
So,
\(F=\dfrac{J}{t}\\\\F=\dfrac{14}{0.001}\\\\F=14000\ N\)
So, the impulse is 14 kg-m/s and the net force applied is 14000 N.
A boy is trying to roll a bowling ball up a hill, as shown in the image below. If
friction is ignored, what is the minimum initial velocity that the ball must have
for it to reach the top of the hill? (Recall that g = 9.8 m/s²)
40 m
A. 28 m/s
B. 21 m/s
C. 7 m/s
OD. 14 m/s
At maximum height final velocity v will be zero. The magnitude of the initial velocity is 28 m/s
What is Velocity ?Velocity can simply be defined as the distance travelled in a specific direction per time taken. It is a vector quantity and it is measured in m/s
Given that a boy is trying to roll a bowling ball up a hill of 40 m high. If
friction is ignored, the minimum initial velocity u that the ball must have for it to reach the top of the hill can be calculated as follow
The given parameters are
g = 9.8 m/s²H = 40 mu = ?v = 0v² = u² - 2gH
At maximum height, v = 0, g is negative because of the upward direction of the ball.
Substitute all the parameters into the formula
0 = u² - 2 × 9.8 × 40
u² = 784
u = √784
u = 28 m/s
Therefore, the minimum initial velocity that the ball must have
for it to reach the top of the hill will be 28 m/s
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What is the net force acting on the piano?
0 11,500 N
0 -11,500 N
0 500 N
0 -500 N
Answer:
500
Explanation:
The net forces should be subtracted, so the number would be 500 N.
Answer:
the net force acting on the piano is -500N.
Explanation:
In this diagram two opposite forces are acting.There net force will be\(F=F_{g} -F_{t} \\F=5,500-6,000\\F=-500N\)
negative sign shows that the force is acting in the upwards direction.What is force?An external agent that can change, shape, size, position, and direction is called force.
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A 12-volt battery causes 0.60 ampere to flow through a circuit that contains a lamp and a resistor connected in parallel. The lamp is operating at 6.0 watts.
Calculate the resistance of the resistor.
A: 7.2
B: 60
C: 72
D: 120
The resistance of the resistor is 120 Ω
What is resistance?"Resistance is a measure of the opposition to current flow in an electrical circuit."
Data given
Power of lamp (P)= 6 W,
Emf of cell (V)= 12 Volt
Current drawn from cell (i) = 0.6 A
Combination is parallel, it means the potential on resistor and lamp is same, so current taken by lamp, by formula,
P= V .i
Substitute the values,
6 = 12× i
i = \(\frac{6}{12}\)
i = 0.5 A ( current taken by lamp) so current taken by resistor,
\(i_{r} = 0.6-0.5 =0.1 A\)
Now the resistance of resistor, by formula,
\(R = \frac{V}{i_{r} }\)
\(R = \frac{12}{0.1} \\R = 120\) Ω
Hence the resistance of the resistor is 120 Ω.
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Part 3 Waves on a string-with a loose end The reflected
wave interferes with the original wave and creates standing wave composed of
nodes and antinodes if the frequency is just right: Instead of a node an antinode
will always exist at the loose end: (This happens because the phase of the wave
is not inverted upon reflection from loose end and therefore always constructively
interfere at that position:) Draw and measure the frequency of the 1st harmonic
(node near driver end followed by an antinode on loose end) Settings: amplitude:
0.05 cm tension: high damping: none turn on: Loose End What fraction of a
wavelength is this? Hz Click Restart' to observe the standing wave. 2. Predict the
frequencies of several higher harmonics: Use the wave simulator to test each of
your calculated harmonics Draw and label the standing waves for each of the
harmonics you discovered: Divide each higher harmonic by the first harmonic:
Are the higher harmonics even-number or odd-number multiples of the first
harmonic?
The first harmonic of the standing wave on a string with a loose end represents half a wavelength.
The fraction of a wavelength represented by the first harmonic is 1/2.
The higher harmonics of a standing wave on a string with a loose end are odd-number multiples of the first harmonic.
1. The first harmonic of a standing wave on a string with a loose end occurs when there is a node near the driver end and an antinode at the loose end. To measure the frequency of the first harmonic, we need to determine the fraction of a wavelength represented by this standing wave.
The first harmonic of the standing wave on a string with a loose end represents half a wavelength.
The first harmonic of a standing wave on a string with a loose end consists of a node near the driver end and an antinode at the loose end. This configuration creates the simplest standing wave pattern.
In a standing wave, a node is a point where the amplitude of the wave is always zero, representing a point of minimum displacement. An antinode, on the other hand, is a point of maximum displacement, where the amplitude is at its highest.
Since the loose end does not invert the phase of the wave upon reflection, the reflected wave and the original wave constructively interfere at the loose end, resulting in an antinode.
In the first harmonic, there is exactly half a wavelength between the node near the driver end and the antinode at the loose end.
Therefore, the fraction of a wavelength represented by the first harmonic is 1/2.
2. To predict the frequencies of higher harmonics, we can use the relationship that the frequency of each harmonic is a multiple of the frequency of the first harmonic. The higher harmonics can be calculated as follows:
Second Harmonic: The second harmonic consists of two nodes and one additional antinode compared to the first harmonic. The fraction of a wavelength for the second harmonic is 1/2 * 2 = 1. Thus, the second harmonic has a frequency that is twice that of the first harmonic.
Third Harmonic: The third harmonic consists of three nodes and two additional antinodes compared to the first harmonic. The fraction of a wavelength for the third harmonic is 1/2 * 3 = 1.5. Thus, the third harmonic has a frequency that is three times that of the first harmonic.
Fourth Harmonic: The fourth harmonic consists of four nodes and three additional antinodes compared to the first harmonic. The fraction of a wavelength for the fourth harmonic is 1/2 * 4 = 2. Thus, the fourth harmonic has a frequency that is four times that of the first harmonic.
In general, the higher harmonics of a standing wave on a string with a loose end are odd-number multiples of the first harmonic.
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In Canadian football, after a touchdown the team has the opportunity to earn one more point by kicking the ball over the bar between the goal posts. The bar is 10.0 ft above the ground, and the ball is kicked from ground level, 36.0 ft horizontally from the bar in (Figure 1). Football regulations are stated in English units, but convert to SI units for this problem.
Answer:
it will go in my boy they get that tuchdown
Explanation:
because I said so
The bar would have been 3.048 meters above the ground and the goalpost would have been 10.9728 meters away as per the SI units.
What is a unit of measurement?
A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.
1 feet = 0.3048 meters
10 feet = 10×0.3048 meters
=3.048 meters
1 feet = 0.3048 meters
36.0 feet = 36×0.3048 meters
=10.9728 meters
According to SI measurements, the goalpost would have been 10.9728 meters away and the bar would have been 3.048 meters above the ground.
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The speed of x-rays is 300 000. m/s. In scientific notation, and with the correct number of significant figures, this speed is… *
Answer:
3.0 x 10 and the exponent on ten is 5.
Explanation:
You are moving the decimal point over to the left 5 times, making the exponent a positive 5 and then you would put a decimal after 3. Making it 3.0 x 10, and the exponent 5.
The speed of x-rays in scientific notation is 3.0 x 10⁶ m/s.
The given parameters;
speed of the x-ray, v = 300,000 m/s
The standard form of the given number represents the scientific notation of the number.
To represent a number in standard form, multiply the number in terms of power or exponent of 10. The value of the exponent represents the number of available zeros present.In scientific notation the speed of the x-ray can be expressed as follows;
300,000 m/s = 3.0 x 10⁶ m/s
Thus, the speed of x-rays in scientific notation is 3.0 x 10⁶ m/s.
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The momentum of an object is determined to be 7.2 X 10^-3
The equivalent unit of the momentum is 7.2 g m/s.
What is the momentum?We have to note that the momentum of the object is determined as the product of the mass and the velocity of the object. The reason why we say that the momentum is a vector is because it has the direction of the velocity of the object.
We know that the unit of the momentum of the object can be said to be the kilogram meter per second given the dimensions of the momentum. we can be able to obtain an equivalent unit when we convert the given value of 7.2 X 10^-3 Kg m/s.
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Missing parts;
The momentum of an object is determined to be 7.2 X 10-3 kg m/s. Express this quantity as provider or use any equivalent unit.
An 8.0 Kg mass is placed at = 3 where should a 10 Kg mass be placed along the − so that the center of mass will be located ay = 4.5?
Answer:
Therefore, the 10 kg mass should be placed at x = 5.7 m along the x-axis to achieve a center of mass located at y = 4.5 m.
Explanation:
To find the position along the x-axis where a 10 kg mass should be placed such that the center of mass is located at y = 4.5, we can use the formula for the center of mass:
x_cm = (m1 * x1 + m2 * x2) / (m1 + m2)
Here, m1 and x1 represent the mass and position of the 8 kg mass, respectively. m2 is the mass of the 10 kg mass, and we need to find x2, its position.
Given:
m1 = 8 kg
x1 = 3 m
x_cm = unknown (to be found)
m2 = 10 kg
y_cm = 4.5 m
Since the center of mass is at y = 4.5, we only need to consider the y-coordinate when calculating the center of mass position along the x-axis.
To solve for x2, we can rearrange the formula as follows:
x2 = (x_cm * (m1 + m2) - m1 * x1) / m2
Substituting the given values:
x2 = (x_cm * (8 kg + 10 kg) - 8 kg * 3 m) / 10 kg
Simplifying:
x2 = (x_cm * 18 kg - 24 kg*m) / 10 kg
Now, we can set the y-coordinate of the center of mass equal to 4.5 m and solve for x_cm:
4.5 m = (8 kg * 3 m + 10 kg * x2) / (8 kg + 10 kg)
Simplifying:
4.5 m = (24 kg + 10 kg * x2) / 18 kg
Multiplying both sides by 18 kg:
81 kg*m = 24 kg + 10 kg * x2
Subtracting 24 kg from both sides:
10 kg * x2 = 81 kg*m - 24 kg
Dividing both sides by 10 kg:
x2 = (81 kg*m - 24 kg) / 10 kg
Simplifying:
x2 = 8.1 m - 2.4 m
x2 = 5.7 m
(brainlest?) ples:(
Answer:
the 10 kg mass should be placed at x = -2.4 m to achieve a center of mass at y = 4.5 m.
Explanation:
To find the position along the x-axis where the 10 kg mass should be placed so that the center of mass is located at y = 4.5, we can use the principle of the center of mass.
The center of mass of a system is given by the equation:
x_cm = (m1x1 + m2x2) / (m1 + m2),
where x_cm is the x-coordinate of the center of mass, m1 and m2 are the masses, and x1 and x2 are the positions along the x-axis.
Given:
m1 = 8 kg,
x1 = 3 m,
m2 = 10 kg,
y_cm = 4.5 m.
To solve for x2, we need to find the x-coordinate of the center of mass (x_cm) by using the y-coordinate:
y_cm = (m1y1 + m2y2) / (m1 + m2),
where y1 and y2 are the positions along the y-axis.
Rearranging the equation and substituting the given values:
4.5 = (83 + 10y2) / (8 + 10).
Simplifying the equation:
4.5 = (24 + 10*y2) / 18.
Multiplying both sides by 18:
81 = 24 + 10*y2.
Rearranging the equation:
10*y2 = 81 - 24,
10*y2 = 57.
Dividing both sides by 10:
y2 = 5.7.
Therefore, the y-coordinate of the 10 kg mass should be 5.7 m.
To find the x-coordinate of the 10 kg mass, we can use the equation for the center of mass:
x_cm = (m1x1 + m2x2) / (m1 + m2).
Substituting the given values:
x_cm = (83 + 10x2) / (8 + 10).
Since the center of mass is at x_cm = 0 (the origin), we can solve for x2:
0 = (83 + 10x2) / (8 + 10).
Rearranging the equation:
83 + 10x2 = 0.
24 + 10*x2 = 0.
10*x2 = -24.
Dividing both sides by 10:
x2 = -2.4.
A little girl pushes a 5.0 kg toy baby stroller at constant speed 7.0 m across the floor. She pushes on the handle with a force of 40 N at an angle of 30o with the horizontal. All parts are 4 points each.
Complete Question
1 a A little girl pushes a 5.0 kg toy baby stroller at constant speed 7.0 m across the floor. She pushes on the handle with a force of 40 N at an angle of 30o with the horizontal. How much work is done by the girl on the wagon?
1b A farmhand pushes 20 ㎏ bale of hay 4m across the floor of the barn if she exerts a horizontal force of 60 N on the hay, how much work is done? (5 pts)
All parts are 4 points each
Answer:
1a
\(W = 242.5 \ J\)
1b
\(W = 240 \ J\)
Explanation:
Considering question a
From the question we are told that
The mass of the toy baby stroller is \(m = 5.0 \ kg\)
The distance covered is \(d = 7.0\ m\)
The force the girl applies on the handle is \(F = 40 \ N\)
The angle at which this force is applied is \(\theta = 30^o\)
Generally the workdone is mathematically represented as
\(W = F_x * d\)
Here \(F_x\) is the force along the horizontal axis , this is mathematically represented as
\(F_x = F cos (\theta )\)
=> \(F_x = 40 * cos(30 )\)
=> \(F_x = 34.64 \ N\)
So
\(W = 34.64 * 7\)
=> \(W = 242.5 \ J\)
Considering question b
From the question we are told that
The mass of the toy baby stroller is \(m = 20 \ kg\)
The distance covered is \(d = 4 \ m\)
The force the girl applies on the handle is \(F = 60 \ N\)
Generally the workdone is mathematically represented as
\(W = F * d\)
=> \(W = 60 * 4\)
=> \(W = 240 \ J\)
A Student 330 m 990m from another tall flip between the the Student stands Sound Interval beteeen cliff is cliff from of 1 st and 630 tall Hip which speed of 330 if the 330 m/s 2nd eh what is echo?
The interval between the first and second echo is 7 seconds. This means that after the initial sound wave reaches the first cliff, it takes a total of 7 seconds for the sound to travel to the second cliff and then return to the student as the second echo.
To determine the interval between the first and second echo, we need to consider the time it takes for sound to travel from the student to the first cliff, and then from the first cliff to the second cliff, and finally back to the student.
Let's break down the distances and calculate the time for each part of the journey:
Distance from the student to the first cliff: 330 meters
Time taken: t₁ = distance / speed = 330 m / 330 m/s = 1 second
Distance from the first cliff to the second cliff: 990 meters
Time taken: t₂ = distance / speed = 990 m / 330 m/s = 3 seconds
Distance from the second cliff back to the student: 990 meters
Time taken: t₃ = distance / speed = 990 m / 330 m/s = 3 seconds
Now, we can calculate the total interval between the first and second echo by adding up the individual times:
Interval between first and second echo = t₁ + t₂ + t₃ = 1 s + 3 s + 3 s = 7 seconds
Therefore, the interval between the first and second echo is 7 seconds. This means that after the initial sound wave reaches the first cliff, it takes a total of 7 seconds for the sound to travel to the second cliff and then return to the student as the second echo.
It's important to note that this calculation assumes a straight path for the sound waves and neglects factors such as air temperature and wind that can affect the speed of sound. Additionally, it assumes perfect reflection of sound waves off the cliffs, which may not be the case in real-world scenarios.
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Note the complete questions is:
A student stands 330m from a tall cliff which is 990m from another tall cliff. If the speed of sound between the cliffs is 330m/s.What is the interval between the first and second echo?
A wire loop is suspended from a string that is attached to point P in the drawing. When released, the loop swings downward, from left to right, through a uniform magnetic field, with the plane of the loop remaining perpendicular to the plane of the paper at all times. Determine the direction of the current induced in the loop as it swings past the locations labeled (a) I and (b) II. Specify the direction of the current in terms of the points x, y, and z on the loop (e.g., x→y→z or z→y→x). The points x, y, and z lie behind the plane of the paper. What is the direction of the induced current at the locations (c) I and (d) II when the loop swings back, from right to left?
Complete Question
The complete question iws shown on the first uploaded image
Answer:
a
\(y \to z \to x\)
b
\(x \to z \to y\)
Explanation:
Now looking at the diagram let take that the magnetic field is moving in the x-axis
Now the magnetic force is mathematically represented as
\(F = I L\) x B
Note (The x is showing cross product )
Note the force(y-axis) is perpendicular to the field direction (x-axis)
Now when the loop is swinging forward
The motion of the loop is from y to z to to x to y
Now since the force is perpendicular to the motion(velocity) of the loop
Hence the force would be from z to y and back to z
and from lenze law the induce current opposes the force so the direction will be from y to z to x
Now when the loop is swinging backward
The motion of the induced current will now be x to z to y
A proton and an electron are moving with the same velocity v perpendicular to a uniform
magnetic field B. Answer the following (explaining the answer):
a) What kind of trajectory each particle follows? (Draw it)
b) Is the value of an electric field E the same for both particles if we want it to make the particles move following a straight-line trajectory? Why?
c) What’s the kinetic energy change before and after applying the electric field?
Data: Proton mass is, approximately, 1836 times electron’s mass.
When E depends on the strength of the magnetic field and velocity, the strength of the electric field must also be the same to maintain a straight-line motion without deviating from it.
What is kinetic energy?The energy that an object has because it is moving is determined by the initial energy in physics. It is defined as the amount of effort required to accelerate an object of known weight from resting to its specified velocity. The body keeps its kinetic energy after gaining it during acceleration, barring speed changes. When slowing from its current pace to a point of rest, the body expends the same amount of energy.
(a)
The magnetic field is on the page and the image is attached.
(b)
The magnetic force must be balanced with force due to the electric Field.
Eq = qvB sinθ
Eq = qvB sin 90
E =vB
(c)
The kinetic energy of the particle with velocity v and mass m,
KE = 1/2 mv²
The proton's kinetic energy is 1836 times more than that of the electron since it is more heavy than it is.
The shift in kinetic energy will then be equal to zero if there is no increase in velocity between before and after the electric field is applied.
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How does something(the big bang) come from nothing by nothing i mean the first universe although we don't know where the first universe is but we do know that nothing can't come from something.
The Big Bang theory is the most widely accepted explanation for the origins of the universe, but it does not necessarily imply that the universe emerged from nothing.
It is possible that new discoveries or insights may shed light on this fundamental question in the future. The universe may have arisen from a pre-existing state or through some other natural process that we do not yet understand.
Instead, the theory describes how the universe underwent a rapid expansion from a very dense and hot state. The conditions and laws of physics that applied during the earliest moments of the universe may not necessarily be the same as those we observe today, and there are many unknowns and uncertainties in our understanding of these early stages.
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two forces f1=(8i+3j)N and f2=(4i+6j) are acting on 5kg object then what is the magnitude and the direction of the resultant force
what is its acceleration of x and y component
what is the magnitude of acceleration of the object
Two forces f1=(8i+3j)N and f2=(4i+6j) are acting on 5kg object then the magnitude of the resultant force is 15 N and the direction of the resultant force is approximately 36.87 degrees from the positive x-axis.
The acceleration of the object in the x-component (\(a_x\)) is 2.4 \(m/s^{2}\), and the acceleration in the y-component (\(a_y\)) is 1.8 \(m/s^{2}\).
The magnitude of the acceleration of the object is 3 \(m/s^{2}\).
To find the magnitude and direction of the resultant force, we need to add the two given forces together.
Given:
f1 = (8i + 3j) N
f2 = (4i + 6j) N
To find the resultant force (\(F_res\)), we simply add the corresponding components:
\(F_res\) = f1 + f2
= (8i + 3j) + (4i + 6j)
= (8 + 4)i + (3 + 6)j
= 12i + 9j
The magnitude of the resultant force (\(|F_res|\)) can be found using the Pythagorean theorem:
\(|F_res|\)= \(\sqrt{(12^2) + (9^2)}\)
= \(\sqrt{144 + 81}\)
= \(\sqrt{225}\)
= 15 N
So, the magnitude of the resultant force is 15 N.
To find the direction of the resultant force, we can use trigonometry. The direction can be represented by the angle θ between the positive x-axis and the resultant force vector. We can calculate θ using the inverse tangent function:
θ = arctan(9/12)
= arctan(3/4)
≈ 36.87 degrees
Therefore, the direction of the resultant force is approximately 36.87 degrees from the positive x-axis.
Now let's calculate the acceleration of the object in the x and y components. We know that force (F) is related to acceleration (a) through Newton's second law:
F = ma
For the x-component:
\(F_x\)= 12 N
m = 5 kg
Using \(F_x\)= \(ma_x\), we can solve for \(a_x\):
12 N = 5 kg * \(a_x\)
\(a_x\)= 12 N / 5 kg
\(a_x\) = 2.4 \(m/s^{2}\)
For the y-component:
\(F_y\) = 9 N
m = 5 kg
Using \(F_y\) = \(ma_y\), we can solve for \(a_y\):
9 N = 5 kg * \(a_y\)
\(a_y\) = 9 N / 5 kg
\(a_y\)= 1.8 \(m/s^{2}\)
So, the acceleration of the object in the x-component (\(a_x\)) is 2.4 \(m/s^{2}\), and the acceleration in the y-component (\(a_y\)) is 1.8 \(m/s^{2}\).
To find the magnitude of the acceleration (|a|), we can use the Pythagorean theorem:
|a| = \(\sqrt{(a_x^2) + (a_y^2)}\)
= \(\sqrt{(2.4^2) + (1.8^2}\)
= \(\sqrt{5.76 + 3.24}\)
= \(\sqrt{9}\)
= 3 \(m/s^{2}\)
Therefore, the magnitude of the acceleration of the object is 3 \(m/s^{2}\)
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On the way home from school, Taylor's car runs out of gas. He has to walk 25m north and 10m west in order to reach the nearest gas station. Find his distance traveled and his displacement from his car
Answer:
The distance is 35 m and the magnitude of the displacement is 26.93 m
Explanation:
Displacement and Distance
These are two related concepts. A moving object constantly travels for some distance at defined periods of time. The total distance is the sum of each individual distance the object traveled. It can be written as:
dtotal=d1+d2+d3+...+dn
This sum is calculated independently of the direction the object moves.
The displacement only takes into consideration the initial and final positions of the object. The displacement, unlike distance, is a vectorial magnitude and can even have magnitude zero if the object starts and ends the movement at the same point.
Taylor walks 25 m north and 10 m west. The total distance is the sum of both numbers:
d = 25 m + 10 m = 35 m
To calculate the displacement, we need to know the final position with respect to the initial position. If we set the coordinates of Taylor's car as the origin (0,0), then his final position is (-10,25), assuming the west direction is negative and the north direction is positive.
The magnitude of the displacement is the distance from (0,0) to (-10,25):
\(D=\sqrt{(25-0)^2+(-10-0)^2}\)
\(D=\sqrt{625+100}=\sqrt{725}\)
D = 26.93 m
The distance is 35 m and the magnitude of the displacement is 26.93 m