You do 1200J of work with gears. If the gears do 1000J of work, what is the efficiency of the gears?

What is hidden during a lunar eclipse? isn't the moon hidden?

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

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant