1) Calculate the centripetal force acting on a 925 kg car as it rounds an unbanked curve with a radius of 75 m at a speed of 22 m/s.



2) A car with a mass of 833 kg rounds an unbanked curve in the road at a speed of 28. 0 m/s. If the radius of the curve is 105 m, what is the average centripetal force exerted on the car?



3) An amusement park ride has a radius of 2. 8 m. If the time of one revolution of a rider is 0. 98 s, what is the speed of the rider?



4) An electron (m=9. 11x10 -31kg) moves in a circle whose radius is 2. 00 x 10 -2m. If the force acting on the electron is 4. 60x10 -14N, what is its speed?



5) A 2. 7x10 3kg satellite orbits the Earth at a distance of 1. 8x10 7m from the Earth’s centre at a speed of 4. 7x10 3m/s. What force does the Earth exert on the satellite?



6) A string can withstand a force of 135 N before breaking. A 2. 0 kg mass is tied to the string and whirled in a horizontal circle with a radius of 1. 10 m. What is the maximum speed that the mass can be whirled at before the string breaks?



7) A motocross rider at the peak of his jump has a speed such that his centripetal acceleration is equal to g. As a result, he does not feel any supporting force from the seat of his bike, which is also accelerating at rate g. Therefore, he feels if there is ni force of gravity on him, a condition described as apparent weightlessness. If the radius of the approximately circular jump is 75. 0 m, what is the speed of the bike?

Answer:

Use Aufbau's principle,

1s^2,2s^2,2p^6,3s^2,3p^6,4s^2

Fill 20 electrons,

Max number of electrons that sub shells can hold,

s=2

p=6

d=10

f=14

Answer:

Explanation:

5x + y = 7

20x - y = -2

    25x = 5

        x = (1/5)

5(1/5) + y = 7

1 + y = 7 .

y = 6

system of equations  5x+y=7, 20x+2=y

is  \(x=\frac{1}{5} \\y=6\)

Therefore,

Calculation

\(5x+y=7.............(i)\\20x+2=y..........(ii)\)

adding equations (i) and (ii)

⇒\(5x+y=7-(20x-y=-2)\)

⇒\(25x=5\)

⇒\(x=\frac{1}{5}\)

putting the value of x in equation (i), we get

⇒\(5\)×\(\frac{1}{5}+y=7\)

⇒\(y=7-1\)

⇒\(y=6\)

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The charge on each of the equally charged drops of hairspray willl be 7 × 10 ⁻¹³ C

The force of attraction between two charges, according to Coulomb's law, is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

Similar charges repel each other, whereas charges that are opposed attract each other.

Given data;

Electric force,F = 9 × 10 ⁻⁹ N

Distance between charges,d = 7 × 10⁻⁴ m

Chrge,q₁ = q₂ =q C

From Columb's law;

\(\rm F = K \frac{q_1q_2}{d^2} \\\\ 9 \times 10^{-9} = 9 \times 10^9 \frac{q^2}{(7 \times 10^{-4})^2} \\\\ q^2 = 4.9 \times 10^{-25} \\\\ q = 7 \times 10^{-13} \ C\)

Hence the charge on each of the equally charged drops of hairspray willl be 7 × 10 ⁻¹³ C

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Based on the provided description, the best description for the motion of this object is that it is standing still.  Since the object is represented by a dot located on the circle and not moving from its initial position, it indicates that there is no change in its position over time. Therefore, the object is not in motion and can be considered stationary.

The options of constant speed, constant acceleration, and falling do not apply in this scenario because the object is not depicted as moving or changing its position on the motion map.

Hence, the most appropriate description for the motion of this object is that it is standing still.

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Answer:

34.34 °C

Explanation:

From the question,

Heat lost by the silver block = heat gained by the iron block.

cm(x-y) = c'm'(y-z)................... Equation 1

Where c = specific heat capacity of the silver block, m = mass of the silver block, c' = specific heat capacity of the iron, m' = mass of the iron. x = initial temperature of the silver block, z = initial temperature of the iron,  y = final temperature of the mixture.

make y the subject of the equation

y = (cmx+c'm'z)/(cm+c'm')............... Equation 2

Given: c = 50 g, c = 0.2350 J/g·°C, x = 100°C, m' = 50 g, c' = 0.4494 J/g.°C, z = 0°C

Substitute these values into equation 2

y = [(50×0.2350×100)+(50×0.4494×0)]/[(50×0.2350)+(50+0.4494)]

y = 1175/(11.75+22.47)

y = 1175/34.22

y = 34.34 °C

The output force on the piece of food the chopsticks pick up is mechanical advantage times 3 N.

The force amplified by utilising a tool, mechanical device, or machine system is known as mechanical advantage. To achieve the desired output force amplification, the gadget trades off input forces against movement.

Mathematically:

mechanical advantage = output force/input force

Given that input force = 3 N.

Hence, output force = mechanical advantage × 3 N.

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Answer:

4. A 10-kilogram sled at rest

Explanation:

The object with most inertia is a 10-kilogram sled at rest.

Inertia is the tendency of a body to remain at rest or continue with uniform motion.

Now, this is better highlighted by Newton's first law of motion which states that "an object will remain in a state of rest or of uniform motion unless it is acted upon by an external force".

The statement that express object with most inertia is 4: A 10-kilogram sled at rest.

Therefore, option 4, is correct.

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Explanation:

divide the distance by the time it takes to travel that same distance, then add your direction to it.

Or change in displacement divided by change in time.

Answer:

In general, a scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a scientific theory. It is a misconception that theories turn into laws with enough research.

Explanation:

hope you get it right

  :)

Answer: Found this in google. Statement based on repeated experiments or observations, that describe or predict a range of natural phenomena. Hope this helps!

Explanation:

Answer:

Unlike hard disks, which use magnetic charges to represent 1s and 0s, Compact Disks, DVD's or Blue Rays use reflected light.

Explanation:

The way CD's work is that they are hit by a laser beam which is reflected on the surface of the disc. These disks have some valleys and mountains that reflect light differently so the CD player will interpret these differences in reflection as data which will then be turned into music, videos or computer files.

Answer:

When the pressure and the temperature are increased the volume is 285.7 ml.

Explanation:

We can find the new volume by using the Ideal Gas Law:

\( PV = nRT \)

Where:

P: is the pressure

V: is the volume

n: is the number of moles

R: is the gas constant

T: is the temperature  

Initially, when V₁ = 200 ml, P₁ = 500 torr and T₁ = 10 °C, we have:

\( nR = \frac{P_{1}V_{1}}{T_{1}} \)   (1)  

And finally, when P₂ = 700 torr and T₂ = 20 °C, we have:

\( nR = \frac{P_{2}V_{2}}{T_{2}} \)   (2)

By equating (1) with (2):

\( \frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}} \)                

\(V_{2} = \frac{P_{1}V_{1}T_{2}}{T_{1}P_{2}} = \frac{500 torr*200 ml*20 ^{\circ} C}{10 ^{\circ} C*700 torr} = 285.7 ml \)

Therefore, when the pressure and the temperature are increased the volume is 285.7 ml.                                                

I hope it helps you!                  

If Jupiter was about the size of a basketball, Venus would be about the size of a baseball.

If Jupiter was about the size of a basketball (approximately 9.4 inches or 24 centimeters in diameter), then a planet about the size of a baseball (approximately 2.9 inches or 7.4 centimeters in diameter) would be roughly 1/3 the diameter of Jupiter.

There are four planets in our solar system that are smaller than Jupiter and roughly 1/3 its diameter: Saturn, Uranus, Neptune, and Venus. Of these, Venus is the closest in size to a baseball, with a diameter of approximately 7,520 miles (12,104 kilometers), making it slightly larger than a baseball but still in the same size range.

So, if Jupiter was the size of a basketball, Venus would be the planet in our solar system that is closest in size to a baseball. Saturn, Uranus, and Neptune would be slightly larger, but still much smaller than Jupiter.

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20.206 N is the force of friction that the wheels have against the floor

Frictional force refers to the force generated by two surfaces that contact and slide against each other.

since , F net = 0

F - fr = m * a                                     equation1

where

F = applied force = 28 N

fr = frictional force = ?

m = mass of object = 43.3 kg

a = acceleration = 0.18 m\(/s^{2}\)

substituting values in equation 1

28 - fr = 43.3  * 0.18

fr = 20.206 N

20.206 N is the force of friction that the wheels have against the floor

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An industrial load consumes 10 kW at a power factor of 0.80 lagging from a 240-V, 60- Hz, single phase source. the current drawn 33.33 A.  reactive power is 6,000 VAR,  apparent power is 10,000 VA, reactive power to raise the power is 1,250 VAR, and capacitor bank is approximately 28.96 μF.

Given:

Real power (P) = 10 kW = 10,000 W

Power factor before correction (pf) = 0.80

Voltage (V) = 240 V

Frequency (f) = 60 Hz

Power factor after correction (pfreq) = 0.95

Now one can substitute the given values into the formulas to find the required values:

Step 1:

P = S × pf

P = 10,000 W × 0.80

P = 8,000 W

Step 2:

S = P / pf

S = 8,000 W / 0.80

S = 10,000 VA

Step 3:

Q = √(\(S^2\) - \(P^2\))

Q = √((10,000 VA\()^2\) - (8,000 W\()^2\))

Q ≈ 6,000 VAR

Step 4:

I = P / V

I = 8,000 W / 240 V

I ≈ 33.33 A

Step 5:

Qreq = P ×tan(acos(pf) - acos(pfreq))

Qreq = 8,000 W × tan(acos(0.80) - acos(0.95))

Qreq ≈ 1,250 VAR

Step 6:

C = Qreq / (2πf\(V^2\))

C = 1,250 VAR / (2π × 60 Hz × (240 V\()^2\))

C ≈ 28.96 μF (capacitance of the capacitor bank in uF.)

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Answer: B

Explanation: just did the quiz

Vector B shows the direction of the centripetal acceleration at this point.

Centripetal acceleration is the acceleration of a frame traversing a circular path. because the pace is a vector quantity (this is, it has both a magnitude, the rate, and a course), when a frame travels on a circular course, its route continuously adjustments, and accordingly its velocity changes.

Centripetal forces motivate centripetal accelerations. within the special case of the Earth's circular motion around the sun – or any satellite's ground movement around any celestial body – the centripetal force causing the movement is the end result of the gravitational enchantment among them.

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Answer:

500j i got it right on a test

Explanation:

Answer:

v/u

Explanation:

v is the image size

u is the object size

but note that you cannot find the magnification of a lens as the v change in different value of u

so the magnification is different too

The type of motion that describes the flight of a softball after it leaves the bat and sails in an arc over the outfield fence The trajectory of a projectile is determined by the angle at which it is launched, the initial velocity, and the effects of air resistance and gravity. The path of a projectile can be predicted using mathematical equations that take into account these factors. Projectile motion is used in a variety of applications, including ballistics, sports, and engineering.

Projectile motion is the motion of a projectile, which is any object that has been thrown, shot, or launched into the air and is subject to gravity. Projectiles move in two dimensions, and their motion can be described using kinematic equations that take into account the initial velocity, the angle at which it was launched, and the effects of gravity.

Projectile motion has two distinct components: horizontal motion and vertical motion. The horizontal motion is constant, which means that it does not accelerate. The vertical motion, on the other hand, is subject to acceleration due to gravity, which is 9.81 m/s².

As a result, the vertical motion of a projectile is parabolic in shape.The trajectory of a projectile is determined by the angle at which it is launched, the initial velocity, and the effects of air resistance and gravity. The path of a projectile can be predicted using mathematical equations that take into account these factors. Projectile motion is used in a variety of applications, including ballistics, sports, and engineering.

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The calculated value of the heat energy released by the system is 196.16 mJ.

To find Q, we can use the following equation:

Q = m * C * ΔT

where:

First, let's convert the given temperature from °C to K:

Cyn6 = 2100 5/53 degrees C = 2373.24 K

-5°C = 278.15 K

Next, we can use the following equation to calculate C, the specific heat capacity of Cyn6:

λ = Q / (m * ΔT)

Solving for C:

C = λ/ (m * ΔT)

Substituting the given values:

C = (3.9 * 10^6 J/mol) / (238 g/mol * 5.53 K)

C = 2963.21 J/g·K

Finally, we can calculate Q:

Q = m * C * ΔT

Substituting the given values:

Q = (238 g) * (2963.21 J/g·K) * (278.15 K)

Q = 196163613 J

Rewrite as

Q = 196.16 mJ (mega joules)

Therefore, the heat energy released by the system is 196.16 mJ.

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Balancing the forces acting on a body is not enough to establish equilibrium because forces are not the only factor involved in determining whether or not an object is in equilibrium.

Equilibrium is established when the forces and torques on an object are balanced. There are two types of equilibria: static equilibrium and dynamic equilibrium.

Static equilibrium is when an object is at rest, while dynamic equilibrium is when an object is moving at a constant speed in a straight line. In both cases, the net force on the object must be zero in order to be in equilibrium. In addition, the net torque on the object must also be zero in order to be in equilibrium. This is because torque is a rotational force that can cause an object to rotate around its center of mass.

Example: A ladder leaning against a wall is a good example of a body that is not in equilibrium even though the forces acting on it are balanced. Even though the weight of the ladder and the force of gravity are balanced, the ladder is not in equilibrium because there is a torque acting on it due to the force of friction between the ladder and the ground. This torque causes the ladder to rotate around its center of mass, which can cause it to fall over if the torque is not countered by another force or torque.

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Explanation:

Soln:-

Given:-

Volume(v)=5.0cm^3

mass(m)=13.5 gm

density (d)=?

We know that,

d=m÷v

=(13.5÷5)g/cm^3

=2.7g/cm^3

Hence, the required density of aluminum is 2.7g/cm^3.

The height from where the pitcher releases the ball is the sum of the height of the pitcher and the height difference between the pitcher's mound and the rest of the baseball field.= 1.8 + 0.2= 2 meters.

If the average pitcher is releasing the ball from a height of 1.8 meters above the ground, and the pitcher's mound is 0.2 meters higher than the rest of the baseball field, the height from where the pitcher releases the ball is 2 meters above the ground. What is the difference between the pitcher's mound and the rest of the baseball field? Difference = Pitcher's mound height - Rest of the baseball field height= 0.2 - 0= 0.2 meters. The height of the pitcher is 1.8 meters.

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The statement "Sunspots are brighter than the rest of the sun's surface" is false.

Magnetism is a physical quality mediated by a magnetic field that refers to the ability to create attracted and repulsive occurrences in other substances. Magnetism is the force that magnets exert when they attract or repel one another. The movement of electric charges causes magnetism. Every material is composed of microscopic components known as atoms. Each atom contains electrons, which are charged particles. Magnetism is caused by attraction when two items are brought together or repulsion when two objects are moved apart. A magnet is an item with magnetic qualities. A magnet, for example, may attract another thing.

Here,

Sunspots are really darker than the surrounding photosphere, and thus appear as black spots on the sun's surface. This is because large magnetic fields are concentrated in these areas, inhibiting convection and cooling the surface.

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Answer:

A wind turbine transforms the mechanical energy of wind into electrical energy. A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion. As wind moves past the blades of a wind turbine, it moves or rotates the blades. These blades turn a generator

Answer:

Solid, Liquid and Gas

Explanation:

They are the 3 states or stages of Matter

The calculated average n2 does not agree with the given index of refraction, indicating a potential discrepancy that may be attributed to experimental limitations or errors.

To analyze the agreement between the values for the index of refraction (n2) of glass in each trial, we can observe the trend and variation in the data. From the table, it appears that the values for n2 increase as the angles θ1 and θ2 increase. However, it is difficult to determine the level of agreement between the values without further statistical analysis or calculation of uncertainties.

The conclusion regarding whether the index of refraction is constant for a given medium depends on the level of agreement observed. If the values for n2 in each trial are close to each other and do not deviate significantly, it suggests good agreement and supports the hypothesis of a constant index of refraction.

On the other hand, if there is significant variation and inconsistency among the values, it indicates that the index of refraction may not be constant for the given medium.

To determine the average value of n2 from the provided results, we can calculate the mean of the n2 values:

Average n2 = (1.46 + 1.61 + 1.73 + 1.96 + 2.08 + 2.13) / 6 ≈ 1.85

Comparing the calculated average n2 (1.85) with the given index of refraction of the glass (1.50), we can see that they do not agree. The calculated average n2 is higher than the given value of 1.50. This suggests that there might be some systematic error or uncertainties in the measurements or calculations.

The difference between the calculated and given values could be due to factors such as experimental errors, instrumental limitations, or other sources of uncertainty in the measurement process.

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Complete question is:

Calculate sinθ1, sinθ2 and n2 for each of your results and add them to table 1. Keep your results to 2 or 3 significant figures.

Compare the values for index of refraction of glass for each trial (values in last column). Is there good agreement between them? Would you conclude that index of refraction is a constant for a given medium?

Determine the average value of n2 from your results.

Compare your calculated n2 with the given index of refraction of the glass (1.50). Do they agree? Explain why it does or doesn’t.

Answer:7.5j

Explanation:

P=w/s

Weight = Fg = mg = (60 kg)*(9.8 m/s2) = 588 N