Una persona empuja una caja de 44 kg desde los 2m/s y llega a una velocidad de 32m/s. Estime la fuerza que ejerce si acelera en una distancia de 74 metros.

A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e