In the following situations, which ball has the greatest kinetic energy? A) A golf ball rolling off the end of a ramp at 3m/s
B) A ping pong ball sitting at the top of a ramp
C) A golf ball sitting at the top of a ramp
D) A ping pong ball rolling off the end of a ramp at 3m/s

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force

Sound travels slower in colder air that it does in warmer air. make a claim about the effect of air temperature on the speed of sound. support your claim with evidence