A helium-neon laser emits light at 632.8 nm. If the laser emits photons/second, what is its power output in mW?

Avoltaic cell converts chemical energy to

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_

Which of the following is not a physical property of mattera. melting pointb. heat of combustionc. viscosityd. boiling point