Question1
A long solenoid with 70 turns of wire per centimeter carries a current of 0.16. The wire that makes up solenoid is wrapped around a solid core of silicon steel. (The wire of the solenoid is jacketed with an insulator so that none of the current flows into the core.)
Question2
You are walking at 4.55 km per hour across a frozen lake in the snow. You do not understand that with each step you turn 0.400 degrees to your right. If your step length is 59.0 cm what is diameter, in meters, of the circle that you are inadvertently tracing out?