Avoltaic cell spontaneously converts chemical energy to
(1) electrical energy (3) mechanical energy
(2) geothermal energy (4) nuclear energy

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Why is nh3 classified as a polar molecule

Explain that newton first law,second law and third law of motion?