27 degrees celcius converted to kelvin

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?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?