Charging stops when the voltage across the capacitor reaches the voltage of the power source.
Speed of a radio wave in vacuum/air is 3x10^8 m/s. so, if speed is also distance/time, then time = distance/speed = 400,000/300,000,000 = ????
Answer: Magnitude of electrical force stays the same.
Explanation:
Equation:

Since the magnitude of each charge is halved.
and
the separation is halved.


Cancel out .25 on the numerator and denominator. Leaving the original equation.
Explanation:
The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth's density is 5.51 grams per cubic centimetre.