a tennis ball is hit straight upward and undergoes freefall. what changes would occur to its velocity and acceleration as the tennis ball is falling downwards from its peak towards the ground>

In what direction does the medium move relative to the direction of the wave? explain.

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

Which branches of natural science include the study of an organism that lived 10 million years ago