The flywheel of an engine has moment of inertia 2.50 kg·m2 about its rotation axis. what constant torque is required to bring it up to an angular speed of 495 rev/min in 7.40 s, starting from rest?

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? ab c d