What can you use to test tread wear on your tires

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

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value