When a voltage or potential difference (V) is applied across a conductor, the current (I) in the material is found to be proportional to the voltage. a. True
b. False

Which of the following represents an upside-down image?

Arock collection comes from which part of earth?

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage