The relationship between a car and energy is that the car uses gas to produce speed within energy needs to be powered
Answer:

Explanation:
Given that,
The magnitude of magnetic field, B = 2.21
We need to find the magnitude of the electric field. Let it is E. So,

Put all the values,

So, the magnitude of the electric field is equal to
.
There are some missing information in the question.
However, since you are talking about magnetic force, I think you refer to the Lorentz force. When a particle of charge q and velocity v is immersed in a magnetic field of intensity B, the force acting on the particle is:

where

is the angle between the magnetic field and the direction of the particle.
Therefore, if force F is doubled, then also the velocity v must be double of its initial value:
Answer:
The main use for gypsum is in the production of Plaster of Paris and drywall products. Gypsum is also used as a soil conditioner.
Explanation:
1) 4min = 4*60 sec = 240 sec
2) Distance = speed times time = 3 * 240 = 720 m