The position versus time for a certain object moving along the x-axis is shown. The objects initial position is -3m. Find the instantaneous velocity at 8 s. Answer is units of m/s.

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

How have the competing explanations' experiments on atoms affected the development of the atomic model?

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