The primary mirror in a reflecting telescope is a
plane mirror.
concave mirror.
convex mirror.

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

If forces acting on an object are unbalanced. true or false

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2