A centrifuge accelerates from rest to 12,000 rpm in 235s. What was the centrifuge's angular acceleration?

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.

Sound is a disturbance that travels through a medium as a

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction