For the Doppler effect to occur?

What is a real world application of atwood's machine?

The force of attraction exerted by non moving static charges in each other A) electrostatic force B) gravitational force C) electromagnetic force D) attractive force

Where did most of the comets in the Kuiper belt come from? A. They came from the Oort cloud B. They are the remains of a planet after it exploded C. They are the remnants of the inner planet's accretion D.

Why do soap molecules adsorb at the water/air interface on the surface of aqueous solutions?

What is the French word for shepherds crook

If earth somehow expanded to a larger radius, with no change in mass, how would you're weight be affected? How would it be affected if earth shrunk?

Consider a helium balloon on a string tied to the seat of your stationary car. The windows are closed, so there is no air motion within the car. The car begins to accelerate forward. Which way will the balloon lean, forward or backward

The force of gravity acts upon meteors from the rocky asteroid belt between mars and Jupiter. Where is the force of gravity most likely to pull these meteors

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. Which of the following best describes how such a telephone is able to transmit and receive information? A.

Calculate the gravitational potential energy relative to the ground when an 82 kg person climbs to the top of a 2.0 m stepladder.