An ideal parallel-plate capacitor consists of a set of two parallel plates of area a separated by a very small distance d. when this capacitor is connected to a battery that maintains a constant potential difference between the plates, the energy stored in the capacitor is u0. if the separation between the plates is doubled, how much energy is stored in the capacitor? a. uo/2 b. uo c. uo/4 d. 4uo e. 2uo

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

What determines the amount of inertia an object has

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?