the emission of electrons or other free carriers when light shines on a material.
the answer is c because it is the 3rd step in the scientific analysis steps
<span>Pitch and frequency are more or less the same thing - high pitch = high frequency.
The freqency of vibration of a string f = 1/length (L) so as length decreases the frequency increases.</span>
5.91(approx) seconds just divide velocity by acceleration