Answer:
Any object that is being acted upon only by the force of gravity is said to be in a state of free fall.
Explanation:
Answer:
If the two waves have the same amplitude and wavelength, then they alternate between ... In fact, the waves are in phase at any integer multiple of half of a period: ... The propagation velocity of the waves is 175 m/s.
Explanation:
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I'm not sure about the magnitude, but the direction of the normal force is upward.