Assume it to be approximately an annular ring with an inner radius of r1 = 0.280 m and an outer radius of r2 = 0.440 m. the motorcycle is on its center stand, so that the wheel can spin freely.(a)if the drive chain exerts a force of 2450 n at a radius of 5.00 cm, what is the angular acceleration (in rad/s2) of the wheel?

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match

Atrain is traveling at 30.0 m/s relative to the ground in still air. the frequency of the note emitted by the train whistle is 262 hz. the speed of sound in air should be taken as 344 m/s. what frequency (f approach) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it? what frequency (f recede) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and receding from it?

A200 g lead frying pan gains 2000 joules of heat. what is the change in temperature