A form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.
Greater red shifts in the spectra of galaxies indicate faster speeds.
Answer:
As the skydiver falls to the Earth, she experiences positive acceleration only due to gravity.
Explanation:
As the skydiver falls to the Earth, she experiences friction in the form of air resistance which tries to slow her down and is proportional to the her velocity. So it cannot have a positive acceleration as it acts in opposite direction to slow her down.
Inertia during skydiving is experienced when we open an parachute, the parachute slows down the speed of are descent hence changing our inertia of motion with a velocity.
Only the Earth's, gravitational field has an positive acceleration as it pulls us towards the Earth, hence increasing our velocity.
We can solve the problem by using Ohm's law.
The resistance of the person, with dry skin, is

. In order to be felt, the current must be at least

Ohm's law gives us the relationship between current and voltage:

where
I is the current
R the resistance
V the voltage
Using the data of the problem, we find that the minimum voltage needed is