(II) Un avión viaja 3100 km a una rapidez de 720 km/h y luego encuentra un viento en cola que incrementa su rapidez a 990
km/h durante los siguientes 2800 km. ¿Cuál fue el tiempo total
del viaje?

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

Need people build a dam to create a reservoir that supplies water a nearby city needs. describe two ways this action will likely affect the water cycle in the local environment. (5 points) worth 20 points

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?