an object with mass m has R distance from the center of the earth. if R=2m, what is the difference between R=2m and 2R?

an object with mass m has R distance from the center of the earth. if R=2m, what is the difference between R=2m and 2R?

Easiest 3 physics topics to have on a final???

When a circular loop enters a uniform magnetic field perpendicular to its plane with uniform velocity, how is the variation of induced EMF with time?

What happens if a DC motor or maybe even a generator, has a circular wire loop instead of a rectangular one?

In a generator (AC or DC), what happens if we use a radial magnetic field, does the induced current become purely DC? If so, is it in use anywhere?

A resistor is placed in a circuit. The current in the circuit is 2 amperes and the voltage drop across the resistor is 8 volts. The voltage is then increased to 12 volts. What will be the new current...

I've spent all day on the following questions and can't seem to get them right. If anyone would be willing to provide a break down with the answer that would be greatly appreciated. I just want to...

1) A block is held at rest, compressing a spring on a frictionless surface, as shown in diagram 1. Use the information given in the diagram to answer the following: a) What is the block's speed...

Which of the following questions best highlights a shortcoming of the big bang theory? A. What makes people think that the universe started from a single point? B. If there was only...

A 750-Newton man is standing on a bathroom scale in an elevator. When the elevator is moving, the man notices that the scale is reading 780 N. How would you describe the motion of the elevator?...

A rollercoaster track provides 6400 N of centripetal force on a rollercoaster car. The car travels at a speed of 22 m/s as it rounds a horizontal curve with a radius of 15 m. What is the mass of the...

1) The angular velocity of a cylinder decreases from 3 rad/s to 2 rad/s in 20 rev. at constant acceleration. a) Î±=? b) How much time does it take? 2) A block...

Please write a question that shows what the main general question pops up when researching or reading about optical illusions. What is a good follow up question on a project about optical illusions...

Degrees as on a protractor

Which observation led scientists to describe matter as behaving like a wave? A. Counts of the number of atoms in a sample B. Electrons flowing from a metal using certain types of light C...

A baritone guitar has a longer neck than a normal guitar. A mandolin has a much shorter neck than a normal guitar. When notes are played on all of the instrumentâ€™s top (thickest) string, which guitar...

A diagram shows a moving 5.00-kilogram cart at the foot of a hill 10.0 meters high. What is the minimum kinetic energy needed for the cart to move from its current position to reach the top of the...

Dwight uses a spring (k = 40 N/m) on a horizontal surface to make a launcher for model cars. The spring is attached to a holder that has a mass of 0.5 kg. If he compresses the spring and releases...

Special relativity can be used to study an object in which frame of reference? A. A frame of reference that has no change in velocity B. A frame of reference that is moving in a circle C...

How would an observer on train A, which is moving close to the speed of light, view a clock in train B, which is stationary at the train station? A. The clock in train B appears to be the same...

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