A tiny ball (mass = 0.035 kg) carries a charge of -16.9 µC. What electric field (magnitude and direction) is needed to cause the ball to float above the ground?

What properties of a moving object are used in determining the object's energy of motion

Imagine that the rightward current flows in the rod for a short time. as a result, what will the net charge on the right and left ends of the rod become? left end negative and right end positive left end negative and right end negative left end negative and right end nearly neutral left end nearly neutral and right end positive both ends nearly neutral

What is the change in internal energy if 20 j of heat is released from a system and the system does 50 j of work on the surroundings? a. -70 j b. 30 j c. -30 j d. 70 j