Energy is related to mass by: E = mc2
If we want to know the mass converted to energy per second, we can express this relation as
L = Δmc2,
and solve for Δm, where Δm represents the change in mass per second.
Δm =
L
(3 ✕ 108 m/s)2

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

Which of the following statements correctly describes a transformer?