A neutron star has more mass then what and is about the same size as what?

A photon of wavelength 0.99235 nm strikes a free electron that is initially at rest. the photon is scattered straight backward. what is the speed of the recoil electron after the collision?

A rocket in space can travel without engine power at a constant speed in the same direction. This condition is best explained by the concept of

Which of the following can easily be studied objectively? history meteorology sociology theology

What is the momentum if you have a ball with the mass of 0.5 kg and velocity of 10 m/s?

Robby skateboards 0.50 blocks to his friend's house in 1.2 minutes. what is his speed? 6.0 blocks/min 6.0 blocks/min, in the direction of his friend's house 0.42 blocks/min 0.42 blocks/min, in the direction of his friend's house

A submarine that is in the sea what principle is that

1. It takes 26.5 N to pull a 72 kg sled across snow. What is the coefficient of friction? 2. A 565 N rightward force pulls a large box across the floor with a constant velocity of 0.75 m/s. If the coefficient of friction is 0.

A person holds onto an object for 2 minutes, but doesn't move the object. Is work done on the object?

Which two vectors add together to give a resultant with the smallest magnitude, and which two vectors add to give a resultant with the largest magnitude? in each case specify the magnitude and direction of the resultant?

The largest velocity reached by a falling object is its