An iron nail does not pick up paper clips as a magnet would.
Answers
Answer:
Because even if iron is magnetic its not a magnet it self unless rubbed a magnetic object
Related Questions
An object with an initial velocity of 27 m/s has a final velocity of 39 m/s after 13 seconds.
What is the object's acceleration?
Answers
Answer:
The answer is 0.92 m/s²Explanation:
To find the acceleration of an object given it's initial and final velocity and time taken we use the formula
\(a = \frac{v - u}{t} \\ \)
where
v is the final velocity
u is the initial velocity
t is the time taken
a is the acceleration
From the question
v = 39 m/s
u = 27 m/s
t = 13 s
We have
\(a = \frac{39 - 27}{13} = \frac{12}{13} \\ = 0.923076... \: \: \: \)
We have the final answer as
0.92 m/s²Hope this helps you
6. You are holding a rock with a mass of 0.30 kg. You let the rock drop from your hand. It hits the ground 0.75
seconds later. How fast was the rock moving right before it hit the ground? For credit, show work in detail.
Answers
Answer:
v = 14.7m/s
Explanation:
When the rock was at the top of cliff it had only Potential Energy and no Kinetic Energy but soon as the rock hit the ground all the Potential Energy converted into Kinetic Energy so by the Law of Conservation of Energy
\(Potential\ Energy = Kinetic\ Energy\\mgh=\frac{1}{2}mv^2\\\\v^2=\frac{2mgh}{m} \\\\v^2=2gh\)
because all of that potential energy got converted into kinetic energy so we use the following formula as we need to calculate the velocity (v)
\(Potential\ Energy = Kinetic\ Energy\\mgh=\frac{1}{2}mv^2\\\\v^2=\frac{2mgh}{m} \\\\v^2=2gh\)
here we know \(g = 9.8m/s^2\) because the rock was under free fall motion so it had acceleration of 9.8 but we do not the height which is h but we do know the formula:
\(Velocity=\frac{Displacement}{Time}\)
the height h is the displacement so we replace height with the following:
\(Velocity=\frac{Displacement}{Time}\\\\Displacement=Velocity*Time\\h=vt\)
now, insert h = vt in the above equation
\(v^2=2gh\\\\v^2=2g(vt)\\v^2=2vgt\\\\\frac{v^2}{v} =2gt\\\\v=2gt\\v=2(9.8)(0.75)\\v=14.7m/s\)
A 1,725 kg car accelerates from 3.0 m/s for 4.4 s and reaches a velocity of 12.0 m/s. Ignoring friction, what is the applied force from the engine?
Answers
Given:
The mass of the car is m = 1725 kg
The initial velocity of the car is
\(v_i=\text{ 3 m/s}\)The final velocity of the car is
\(v_f=\text{ 12 m/s}\)The time is t = 4.4 s
To find the applied force.
Explanation:
The force can be calculated by the formula
\(F=\text{ ma}\)Here, a is the acceleration.
The acceleration can be calculated as
\(\begin{gathered} a=\frac{v_f-v_i}{t} \\ =\frac{12-3}{4.4} \\ =2.045\text{ m/s}^2 \end{gathered}\)On substituting the values, the force applied will be
\(\begin{gathered} F=ma \\ =1725\times2.045 \\ =3527.625\text{ N} \end{gathered}\)Thus, the applied force is 3527.625 N
Sarah's mother gets a flat tire on her car while driving Sarah to school. They use a jack to change the tire. It exerts a force of 5,000 N to lift the car 0.25 m. How much work is done by the jack?
Answers
Answer:
1250 J
Explanation:
Work is said to be done when a force causes an object to move over a distance. The amount of work done (W) is calculated by multiplying the force by the distance traveled.
That is;
W = F × d
Where;
W = work done (J or N/m)
F = force (N)
d = distance (m)
Based on the information provided in this question, F = 5000N, d = 0.25m
Hence;
W = F × d
W = 5000 × 0.25
W = 1250J
Therefore, 1250Joules of work is done by the jack.
When two objects made of different materials are rubbed together, they will attract each other after the charging process.Immersive Reader (1 Point) True False
Answers
Answer:
True
Explanation:
because their is friction(e.g take a ruler rub it in your hair then put it on top of a piece of paper on the table then u will see the process)among the two objects.
in the hubble extreme deep field (shown), we see galaxies in many different stages of their lives. in general, which galaxies are seen in the earliest (youngest) stages of their lives?
Answers
In the Hubble Extreme Deep Field, the galaxies seen in the earliest (youngest) stages of their lives are typically the small, faint, and irregularly shaped galaxies.
The Hubble Extreme Deep Field is an image captured by the Hubble Space Telescope that shows a small, seemingly empty patch of sky that contains thousands of galaxies. These galaxies vary greatly in size, shape, and color, and they are located at different distances from us.
Some of these galaxies are very young, while others are much older. However, in general, the galaxies that are seen in the earliest (youngest) stages of their lives tend to be small, faint, and irregularly shaped. This is because they are still in the process of forming and have not yet had the chance to merge with other galaxies or grow in size.
In conclusion, the small, faint, and irregularly shaped galaxies are the ones that are typically seen in the earliest (youngest) stages of their lives in the Hubble Extreme Deep Field. As these galaxies evolve and grow, they may become more structured and take on different shapes and sizes.
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Suppose that the oil in a hydraulic hoist is replaced by air. Would the hoist still operate as well? Explain.
Answers
The object/objects inside would have to be of a certain consistency/element/form so air wouldn’t work
Lucy and JoJo need to make 140 cupcakes for the school dance. Lucy made 35 of the cupcakes. JoJo made 42 cupcakes What fraction of the cupcakes do Lucy and JoJo still need to make?
Answers
Answer:
9/20
Explanation:
According to this question, Lucy and JoJo need to make 140 cupcakes for the school dance. Lucy made 35 of the cupcakes while JoJo made 42 cupcakes. This means that in total, (42 + 35) cupcakes has been made by both Lucy and JoJo
That is, 77 cupcakes out of 140 has been made. This is 77/140 i.e. 11/20
Since 77/140 cupcakes has been made, Lucy and JoJo still need to make;
140 - 77 = 63 cupcakes to meet up their target for the school dance.
This means that the fraction left is 63/140
63/140 in its lowest term is 9/20
Hence, 9/20 of the cupcakes still need to be made by Lucy and JoJo.
Explanation: 140 - 35 = 105 - 42 = 63
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I use tusk act 4 main
a
student is pushing a 55 kg box of textbooks with a horizontal force
of 320 N into their turn room across a rich sidewalk.
a. calculate the weight of the box of books.
b. calculate the coefficient of
than, answer. 6. A student is pushing a 55 kg box of textbooks with a horizontal force of 320 N into their dorm room across a rough sidewalk a Calculate the weight of the box of books? b. Calculate th
Answers
a) The weight of the box of textbooks can be calculated as follows;
Weight of
box= mass × acceleration due to gravity
Where mass= 55 kg
Acceleration due to
gravity= 9.8 m/s²Thus, the weight of the box of textbooks is given by;
Weight of
box= 55 kg× 9.8 m/s²= 539 N
the weight of the box of textbooks is 539 N.
b) The coefficient of friction can be calculated using the formula;Coefficient of friction= frictional force/ Normal forceWhere, frictional force is the force required to keep the box moving at constant velocity and normal force is the force acting on the box perpendicular to the surface on which the box is resting.
The force F of the student pushing the box can be resolved into its horizontal and vertical components as follows;
F_x= 320 N (this is the horizontal component of the force)F_y=
(This is the vertical component of the force)Thus, the normal force on the box is given by;
F_y= Normal forceNormal force= weight of box= 539 NThe frictional force is given by.
F_f= F_x= 320 NThe coefficient of friction is given by;Coefficient of friction= frictional force/ Normal forceCoefficient of friction= F_f/ F_yCoefficient of friction= 320 N/ 539 NCoefficient of friction= 0.593Therefore, the coefficient of friction is 0.593.
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Lori wants to send a box of oranges to a friend by mail. The box of oranges cannot exceed a mass of 10.222 Kg. If each orange has a mass of 198 g what is the maximum number of oranges she can send?
Answers
Explanation:
Given that,
The box of oranges cannot exceed a mass of 10.222 Kg if we are sending to a friend by mail.
The mass of each orange is 198 g
We know that,
1 kg = 1000 g
10.222 kg = 10.222×1000 g
Let there are n number of oranges. So,
\(n=\dfrac{10.222\times 1000\ g}{198\ g}\\\\n=51.92\approx 52\ \text{oranges}\)
It means she can send 52 oranges and it is maximum quantity.
"what is the horse's average velocity during the first ten seconds of its gallop
Answers
Answer:
This question is incomplete
Explanation:
This question is incomplete. However, from the completed question, determine the distance (in meters) the horse covered in the first ten seconds of it's gallop and apply the formula below.
Average velocity = distance (in meters) ÷ time (in seconds as provided in this question)
The unit for velocity (to be used here) is m/s or ms⁻¹
Upon what does the energy of a quantum depend?
the amount of light emitted
the duration of the radiated energy
the element involved in generating the quantum
the frequency of its radiation
Answers
Answer:
the answer is number 3 or C.
choose the correct definition of precession, and the correct explanation how does it affect what we see in our sky?
Answers
Precession is the slow and continuous change in the orientation of the rotational axis of a spinning body, such as a spinning top or the Earth.
When compared to its orbital plane around the sun, the Earth's rotational axis tilts at an inclination of about 23.5 degrees.
The Earth's rotational axis travels in a round pattern in space as a result of precession; one full cycle takes about 26,000 years to complete. The celestial poles, which are the spots in the sky where the Earth's rotational axis crosses the celestial sphere, are impacted by this movement of the rotational axis.
The Earth's spinning axis points in a different direction over time as a result of precession, which affects the position of the celestial poles. The position of the stars as seen from Earth is then impacted by this.
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The output of a solar panel powers a small pump. The pump operates a garden water fountain. The output of the solar panel is 10 V and the current supplied to the pump is 0.25 A. Calculate the electrical power generated by the solar panel.
Answers
The power generated by solar panel will be "2.7 W".
According to the question,
The values are:
Output of solar panel,
10 VCurrent,
0.25 AThe electrical power generated will be:
→ \(P = VI\)
By substituting the given values is the above formula, we get
→ \(= 10\times 0.27\)
→ \(=2.7 \ W\)
Thus the above answer is right.
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How much work does a bricklayer do to carry 30.2 kg of bricks from the ground up to the third floor (height = 11.1 m) of a building under construction? What is the gravitational potential energy of the brick-Earth system when the bricklayer reaches the third floor?
Answers
Answer:
Work done by the bricklayer, W = 3.285 kJ
Therefore, the gravitational potential energy of the brick-Earth system = 3.285 kJ
Explanation:
Work done is the product of applied force and distance moved by the force.
The force on an object in the gravitational field is equal to the product of the mass of the object and acceleration due to gravity This force is the weight of the object or body. In lifting an object from a lower height to a higher one, the distance moved is equal to the increase in height.
Work done in lifting an object in a gravitational field = mgh
where m = mass of the object, g = acceleration due to gravity, h = height
From the question, m = 30.2 kg, g = 9.8 m/s², h = 11.1 m
Work done by the bricklayer = 30.2 * 9.8 * 11.1 = 3285.156 J
Work done by the bricklayer, W = 3.285 kJ
Gravitational Potential Energy, PEg = mgh = W
Therefore, the gravitational potential energy of the brick-Earth system = 3.285 kJ
Do you think it is plausible for other pairings of the galilean satellites to eclipse each other? explain your answer.
Answers
Yes, it is plausible for other pairings of the Galilean satellites to eclipse each other.
The Galilean satellites are the four largest moons of Jupiter, and they are in a complex orbital dance around Jupiter.
They regularly pass in front of one another, casting shadows and causing eclipses.
Io, Europa, and Ganymede are in a Laplace resonance, which means that they are in a synchronized orbit around Jupiter.
This interaction can cause a gravitational tug on each other, leading to a potential for eclipses.
In fact, there have been observations of eclipses between other pairs of Galilean satellites, such as Europa and Ganymede.
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I NEED HELP ASAP
Since the investigative question has two variables, you need to focus on each one separately. Thinking only about the first part of the question, mass, what might be a hypothesis that would illustrate the relationship between mass and kinetic energy? Use the format of "if…then…because…” when writing your hypothesis.
Answers
Explanation:
The formula of kinetic energy is K.E= m\(v^{2}\)/2 , where m is the mass and v is the velocity. According to the formula, if we double the mass, the kinetic energy will also double then we can say the Kinectic energy is directly proportional to the mass.
Answer:
Sample Response: If the mass of an object increases, then its kinetic energy will increase proportionally because mass and kinetic energy have a linear relationship when graphed.
Explanation:
100% Edge 2022 :)
An object is moving east with a constant speed of 30 m/s for 5 seconds. What is the object's acceleration
Answers
Answer:
The answer is 6 m/s²Explanation:
The acceleration of an object given it's velocity and time taken can be found by using the formula
\(a = \frac{v}{t} \\ \)
where
v is the velocity
t is the time
We have
\(a = \frac{30}{5} \\ \)
We have the final answer as
6 m/s²Hope this helps you
footballer shoots ball has mass (m) with force (F), ball gains velocity from force its value is 6m/s. the ball stops after 10sec. So magnitude of momentum of ball after 3.333 sec. is....... kg.m/sec. ( choose the best answer)
3m
4m
6m
8m
Answers
The magnitude of momentum of the ball after 3.333 sec is 10F/3 kg.m/sec. None of the options provided match this answer exactly.
What is Momentum?
Momentum is a physical property of an object that describes its motion. It is defined as the product of an object's mass and velocity, and it is a vector quantity, which means it has both magnitude and direction.
The magnitude of momentum of the ball after 3.333 sec can be calculated using the equation:
p = m * v
where p is momentum, m is mass, and v is velocity.
Given that the ball gains a velocity of 6m/s from the force and stops after 10 seconds, we can calculate the mass of the ball as:
v = F * t / m
6 = F * 10 / m
m = 10F / 6
m = 5F / 3
Now, we can calculate the momentum of the ball after 3.333 sec using the above equation:
p = m * v
p = (5F / 3) * (6 * 3.333 / 10)
p = (5F / 3) * 2
p = 10F / 3
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at the top of a hill, an athlete on a skateboard has x joules of mechanical energy. how much mechanical energy will she have at the botto
Answers
The athlete has x joules of mechanical energy at the top of the hill, she will also have x joules of mechanical energy at the bottom of the hill, neglecting any losses due to friction or other factors.
Assuming that there is no significant loss of mechanical energy due to friction or other factors, the athlete on the skateboard will have the same amount of mechanical energy at the bottom of the hill as she did at the top. This is due to the law of conservation of mechanical energy, which states that the total amount of mechanical energy in a closed system remains constant.
Mechanical energy is the sum of kinetic energy and potential energy. At the top of the hill, the athlete has only potential energy due to her height above the ground. As she moves downhill, some of this potential energy is converted into kinetic energy as she gains speed. At the bottom of the hill, all of the potential energy has been converted into kinetic energy, but the total amount of mechanical energy is the same as it was at the top.
Therefore, if the athlete has x joules of mechanical energy at the top of the hill, she will also have x joules of mechanical energy at the bottom of the hill, neglecting any losses due to friction or other factors.
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Rewrite the following sentence in the negative form >Each library contains 3000 brand new books
Answers
∠1 and ∠2 are vertical angles. If m∠1 = (17x + 1)° and m∠2 = (20x – 14)°, find m∠2. Answer with "m∠2=_"
Answers
Answer:
m<2 = 86
Explanation:
Vertical angles means the angles are equal to each other so:
<1 = <2
17x + 1 = 20x - 14
17x - 20x = -14 - 1
-3x = -15
x = 5
m<2:
20x - 14
20(5) - 14
100 - 14
86
what is electricity
Answers
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.
a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.
Hope this helps
A baseball bat balances 71.1 cm from one end. If a 0.560 kg glove is attached to that end, the balance point moves 23.7 cm toward the glove. Find the mass of the bat.
Answers
Based on the principle of moments, the mass of the baseball bat is 1.12 kg.
What is the mass of the baseball bat?The mass of the baseball bat is determined using the principle of moments as follows:
The principle of moments states that the sum of anticlockwise is equal to the sum of the clockwise moments about the fulcrum.
Assuming the mass of the baseball bat acts through the center of gravity:
d * Mg = x * mg
where;
M is the mass of the bat
m is the mass of the glove = 0.560 kg
x is the pivot point = 71.1 - 23.7
x is the pivot point = 47.4
d is balance point = 23.7
g is the acceleration due to gravity = 9.8 m/s²
M = x * m / d
M = 47.4 * 0.560 / 23.7
M = 1.12 kg
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plaque contains billions of bacteria true or false
Answers
Answer:
true
Explanation:
Answer: True
Explanation:
If a geothermal power plant produces 6000 watts of power for every 13000 watts of heat from water, what is its efficiency?
Answers
If a geothermal power plant produces 6000 watts of power for every 13000 watts of heat from water, so its efficiency is 46%.
What is efficiency?Efficiency is defined as the proportion of energy which is wasted during a process. The rate at which energy is wasted needs to be reduced and there are a many ways to save energy, such as thermal energy. The formula of efficiency is equals to useful power out divided by total power in. Mathematically it is written as
Efficiency = useful power out ÷ total power in
Some amount of energy is always wasted from every machine, the efficiency should always be less than 1 or less than 100%. No machine is 100 percent efficient.
So we can conclude that if a geothermal power plant produces 6000 watts of power for every 13000 watts of heat from water, so its efficiency is 46%.
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If you travel 100km west and then 500km west, what is the total displacement
Answers
Answer: 600 km west
Explanation:
When looking at total distance/displacement, simply add the two given quantities together. Note- in the future, make sure to pay attention to units and directions of components. For example, if it was 100 km east and then 500 km west, your total would be -100 km west + 500 km west, giving you 400 km west.
A long wire carries a long wire carries a current toward the east in a magnetic field that is directed due south. What is the direction of the magnetic force on the wire? a) west b) north c) east d) vertically upward e) vertically downward
Answers
When a long wire carries a current towards the east in a magnetic field that is directed due south, the direction of the magnetic force on the wire is vertically downward.
The force exerted by a magnetic field on a moving charged particle is described by the Lorentz force equation. The direction of the magnetic force F on a moving charged particle with charge q is given by F = qv x B, where v is the velocity of the particle and B is the magnetic field vector.
The direction of the magnetic force is perpendicular to both the velocity of the particle and the direction of the magnetic field.
If the current in the wire is towards the east and the magnetic field is directed towards the south, then the magnetic force on the wire will be perpendicular to both these directions, which is vertically downward.
Therefore, the correct option is e) vertically downward.
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How does online gaming affect the health of the student
Answers
Answer:
because we more see th online gaming and not eat food and playing that game all the time so it effect the health
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10.What is the acceleration of a freely falling object 5 seconds after it has been released from a height of 200 m
Answers
Answer:
9.81 m/s^2
Explanation:
Acceleration is constant 9.81 m/s^2 ( of course....ignoring air friction)