Calculate the force of gravity in (N) on a 87 kg astronaut on the surface of Neptune. The mass of Neptune is 1.02 x 1026 kg, and its radius is 2.5 x 107 m. (Remember G=6.67 x 10-11)

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

Name two kinds of practical electric pumps.

Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.