A force of 100N was necessary to lift a rock. A total of 150J of work was done. How far was the rock lifted?

A wave has a wavelength of 45 meters and a period of 9.0 seconds. What is the frequency of the wave?

What is 62.125 kg rounded to two significant figures?

3. What is the difference between an emission spectrum and an absorption spectrum? What is the Bohr model of the atom, and how does it explain both emission and absorption spectra?

An object moving in a straight line changes its velocity uniformly from 2m/s to 4 m/s over a distance of 12 m. What was its acceleration? (A) 0.5 m/s^2 (B) 1 m/s^2 (C) 2 m/s^2 (D) 3 m/s^2

An elevator rising at a constant speed. What forces are acting on the elevaror? A: Normal and tension B: Gravity and tension C: Normal, gravity, and tension D: Gravity

A baseball player is dashing toward home plate with a speed of 3.8 m/s when she decides to hit the dirt. She slides for 1.3 s, just reaching the plate as she stops (safe, of course).

The water that powers the generators enters and leaves the system at a low speed (thus we can neglect its change of kinetic energy) and loses 160 m of altitude during the process.

What is: the fastest car the fastest animal the fastest human the fastest aeroplane

Why is gravitational potential energy negative?

Imagine an elevator crowded with too many passengers for such a small space. This situation would be a good analogy for a substance with what property