A cannonball is fired horizontally from the top of a cliff. The cannon is at height H= 100 m above ground level, and the ball is fired with initial horizontal speed v0 assume acceleration due to gravity to be g=9.80m/s^2

In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift the piano.

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2