A potential difference is applied across the ends of a metallic conductor kept at a fixed temperature. If we plot the value of the applied potential difference (V) versus the current passing (I) then

When you turn on a battery-operated device, an electrical circuit is

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?