Imagine that f and f were exerted by equal masses suspended at 900 and 2700 respectively. what force f, is needed for the ring to be in translational equilibrium?

A-4.60 μc charge is moving at a constant speed of 6.80×105 m/s in the +x−direction relative to a reference frame. at the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points.

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false