Atransformer for a laptop computer converts a 120-v input to a 24-v output. if the output current for the transformer is 1.8 a, find the input current.

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

What happens to the light rays when they hit the specimen?