Which event in a solar cell uses the photoelectric effect?

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?