At a construction site, the site manager notices that a crane takes 20 seconds to lift a 500kg steel beam up to a height of 15 meters. from this information, he calculates the power output of the crane to be what value?

Part a constants huck finn walks at a speed of 0.60 m/s across his raft (that is, he walks perpendicular to the raft's motion what is huck's velocity (speed and direction) relative to the river bank? express your answer to three significant figures and include the appropriate units. relative to the shore)

Un jugador de beisbol batea un foul recto en el aire. la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher

As the distance from a magnet increases, what happens to the magnet force?