When energy is transferred from one part of a system to another, some of the energy is lost during the transfer and cannot be used as it was intended. which two sentences describe examples of this? A-sunlight strikes a solar panel, generating electricity. B-wind moves a turbine, generating electricity. C-friction between the moving parts of an airplane engine warms the parts as the engine burns fuel. D-an electric motor heats up as it powers a blender. E-stereo speakers emit sound when powered by electrical energy.

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Asystematic approach to problem solving is called a (an)

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)