How many degrees equal π in radians? How many revolutions (turns) equal π radians? ​

Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

What are two different ways you could find the value of a? explain these methods.