Do I have abs?

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.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Diamond will scratch quartz. true or false