Answer:
A causes free electrons to flow
Explanation:
The amount of force that causes electrons to flow in a conductor is called electromotive force.
The Answer is true, the saying opposites attract are true for magnets when poles match though they repel.
Answer:
708.3 Hz
Explanation:
For an open-air column, like the empty can, the fundamental frequency is given by

where
v = 340 m/s is the speed of sound
L is the length of the column
In this problem, the length of the bottle is
L = 24 cm = 0.24 m
Therefore, the fundamental frequency is

Magenta is the psychological perception of the mixture of red and blue light
at high intensity, with the absence of green. So your "magenta" paper is
absorbing the green and reflecting the red and the blue.