Describe how sound waves are affected by each medium (solid liquid and gas) through which the sound wave passes.

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?