7.3) A 0.500 kg ball is tied to the end of a 1.50 m string and revolved in a horizontal plane. The ball is
revolved so its angle is 35.0°. Find the velocity of
the ball. [2.43 m/s]

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

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.

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