A ball rolling down an incline has its maximum kinetic energy at

What invention proved wagner to be right?

Do radio waves travel at the speed of sound

A mechanical wave generally does NOT A. move through a medium. B. move the medium from one place to another. C. move through solids. D. disturb the medium.

Two blocks A and B each of mass m are placed on a smooth horizontal surface. Two horizon forces F and 2F are applied on the two blocks A and B. The block A does not slide on block B. Then the normal reaction between the blocks is

How is the magnetic force on a particle moving in a magnetic field different from gravitational and electric forces.

The net force acting on an insect falling downward at constant velocity is

Which statement best compares the accelerations of two objects in free fall? O The heavier object has a greater acceleration.

A series RCL circuit includes a resistance of 280, an inductive reactance of 508, and a capacitive reactance of 315. The current in the circuit is 0.312 A.

A ray in benzene has a critical angle of 41.8 deg when trying to enter air. What is the index of refraction for benzene?

An elevator has mass 600 kg, not including passengers. the elevator is designed to ascend, at constant speed, a vertical distance of 20.0 m (five floors) in 16.0 s, and it is driven by a motor that can provide up to 40 hp to the elevator.