Wires 1 and 2 are made of the same metal. Wire 2 has twice the length and twice the diameter of wire 1. Required:
a. What is the ratio R2 / R1 of their resistances?
b. What is the ratio p2/p1 of the resistivities of the two wires?

The man fires an 80 g arrow so that it is moving at 80 m/s when it hits and embeds in a 8.0 kg block resting on ice. how far will the block slide on the ice before stopping? a 7.1 n friction force opposes its motion.

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

Aball thrown by ginger is moving upward through the air. diagram a shows a box with a downward arrow. diagram b shows a box with an upward arrow. diagram c shows a box with a downward and upward arrow equal in size. diagram d shows a box with a downward and upward arrow with the downward arrow larger in size. which force diagram represents the forces on the ball? you may neglect the effects of air resistance.