Stephen is playing pool. He hits the cue ball with a force of 240 N and this takes .05 seconds. If the mass of the cue ball is .08 kg, how fast is the cue ball moving after it is hit?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

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 compounds would be primarily ionic? methane, ch4, ammonia nh3, calcium chloride, cacl2, or carbon dioxide, co2