A 1024 Hz tuning fork is used to obtain a series of resonance levels in a gas column of variablelength, with one end closed and the other open. The length of the column changes by 20 cmfrom resonance to resonance. From this data, the speed of sound in this gas is

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j ?

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?