What will the unknown angle θ be in order for the pulley system to the right to be in static equilibrium? note that the 80 n weight is attached to a free-moving pulley and the cable is fastened to the wall on the left

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

What was the first instrument to ever record an earthquake?

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9