a fishing boat starts from rest and has a constant acceleration. In a certain time interval, its displacememt doubles. In the same time interval, by what factor does its velocity increase?

Are aliens real? justify you’re answer.

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?

The material that keeps its new shape after it is stretched is called?