Answer:
(a) Approximately
.
Explanation:
Let
denote the capacitance of a capacitor. Let
be the potential difference (voltage) between the two plates of this capacitor. The energy
stored in this capacitor would be:
.
Rearrange this equation to find an expression for the potential difference
in terms of capacitance
and energy
:
.

The capacitance
of this capacitor is given in nanofarads. Convert that unit to standard unit (farads):
.
Given that the energy stored in this capacitor is
, the potential difference across the capacitor plates would be:
.
Answer:
The vibrations from sound waves cause our ears to send signals to our brains to create sound. The speed of sound waves will determine the sound's pitch, or how high or low something sounds. Sound waves are important because they allow us to hear important messages and emergency signals to protect ourselves.
Explanation:
I hope this helps :)
Explanation:
The Coulomb's law states that the magnitude of each of the electric forces between two point-at-rest charges is directly proportional to the product of the magnitude of both charges and inversely proportional to the square of the distance that separates them:

In this case we have an electron (-e) and a proton (e), so:

In this case, the electric force is negative, therefore, the force is repulsive and its magnitude is:
