The main light gathering device of a refractor telescope is

In most circumstances, the normal force acting on an object and the force of static friction do no work on the object. However, the reason that the work is zero is different for the two cases.

High frequency sound waves have a shorter wavelength and a higher A. amplitude B. pitch C. wavelength? than low frequency sound waves

Two asteroids are flying through space, each with an unknown momentum, and The equation shows vector p sub 1. The equation shows vector p sub 2. The equation shows vector p sub x.

Which of the following energy systems is used most when running a 10-second sprint?

Which of the following has the greatest amount of kinetic energy a) slice of pizza b) a person at the top of the stairs c) wind d) a book on a table

What is the momentum of a 15 kg tire rolling down a hill at 3 m/s? 5 kg • m/s 18 kg • m/s 45 kg • m/s 60 kg • m/s

Which of Newton's laws, when combined algebraically with his law of universal gravitation, can be used to calculate Earth's mass? A) first B) second C) third

Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not? A. Helium has no mass, but air does. B. Helium increases the balloon's mass more than air. C.

Consider the following controls in an automobile in motion : gas pedal, brake, steering wheel. what are the controls in this list that cause an acceleration of the car?

What material are oil pipelines made from?