A conductive wire has a resistance of 36 ohms at 32 ° C centigrade and 63 ohm at 23 ° C. Calculate the temperature coefficient and the resistance it presents if the temperature increases by 100 ° C compared to the initial one.

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.