You drop a rock down a well that is 31 m deep. How long does it take the rock to hit the bottom of the well?
O A. 6.3 5
O B. 2.7 s
O C. 1.9 s
O D. 2.5 s

Is the time in tennessee the same as florida

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

What word chemical equation describes cavendish’s experiment with zinc?