A 15kg uniform disk A with a radius of 0.4 m is rotating without friction about its center at 10 rad/s. Then another disk B is dropped onto the first disk. The second disk has a mass of 15kg and radius of 0.3m. The second disk is initially not rotating. There is friction between the disks. What is the angular speed of both disks when they stop slipping relative to each other

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.