If you were to drop a rock from a tall building, assuming that it had not yet hit the ground, and neglecting air resistance, after it has fallen 22 m: how much time has passed (in s)? what is the speed at this distance (in m/s)?

How do we measure or think of speed in the united states?

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.

Why do atoms emit energy of only specific wavelengths