When a sound from a source is refracted away from the surface of the earth, it gives an indication that the
a. air is cooler than the ground. b air has high humidity. c wind is blowing in the direction of the sound. d ground is cooling faster than the air.

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

Amajor difference radio waves, visible light, and gamma rays is the of the photons, which results in different photon frequencies and wavelengths

Which form of pure carbon is so hard that it can be used in cutting tools?