With explanation pls

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping