Un atleta attraversa un fiume largo 100m alla velocità di 1.4 m/s, ma incontra una corrente di 0.80 m/s perpendicolare alla sua direzione. Quale distanza avrà percorso?

Phase changes are chemical changes. true or false

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.

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up