Ball thrown upwards at velocity of 21.3 m/s what time will ball reach highest point

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 best represents the law of conservation of mass ?

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?