You pull on the front of a box with a force of 30N. Your friend pushes on it from the back with a force of 40N. The net force is 70N.

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

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

What part of the ear is names after tools, such as the hammer and the anvil?