The temperature u in a thin circular metal plate of radius 1 m only depends on the distance r from the utre of the: plai. aai the cienlar blry ofth plaie is perectly iesaisl (ie no heat flow across the boundary) determine the temperature u in the plate at time t, given a temperature distribution u-f(r) at t0

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u.s. legal proceeding.)

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question