Q1. A single-turn circular loop of radius 6.20 cm is to produce a field at its center that will just cancel the earth's field of magnitude 0.70 G directed at 70 below the horizontal north direction. Find the current in the loop.

Q2. A chair of weight 130 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 43.00 N directed at the angle of 35.0 degrees below the horizontal and the chair slides along the floor. Using Newton's laws, estimate n, the magnitude of the normal force that floor exerts on the chair.