Please help me plz...

Explain why electric current cannot exist if a current doesn't have a voltage source.

Which body is in equilibrium? (1) a satellite orbiting earth in a circular orbit (2) a ball falling freely toward the surface of earth (3) a car moving with a constant speed along a straight, level road (4) a projectile at the highest point in its trajectory

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical