An observer accurately measures the constant velocity of a car from her frame of reference. Another observer measures the constant velocity of the car from his frame of reference. If the two frames of reference are at rest with respect to each other, how will the velocity measurements compare?

The necleus of an atom is made up of what subatomic particles?

Which of these metals are magnetic?

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?