What does it mean for a chemical equation to be balanced?

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

Why should the wavelength scale of spectroscope be calibrated

Part of a control linkage for an airplane consists of a rigid member cb and a flexible cable ab. if a force is applied to the end b of the member and causes it to rotate by θ = 0.5°, determine the normal strain in the cable. originally the cable is unstretched.