Una caja de madera se desliza a velocidad constante sobre una mesa de trabajo; si la caja tiene una masa de 15Kg. y el coeficiente de fricción es de 0.2. Determina el valor de la fuerza que se le aplica a la caja de madera.

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.

The two required components for a generator

Question 1 (5 pts): what is the maximum distance for which you can you resolve the two individual headlights of an on-coming truck as two separate lights rather than one if the headlights are separated by 2.00 m and your eye has a diameter of 1.00 centimeter? assume a wavelength of 500 nm.