An unpolarized laser has an average power of 1.600mW. At a distance of 20.0 m it forms a circle with a diameter of 3.50 mm. 3pts. a. Assuming the entire average power of the laser is within the circle of light, what is the intensity of the laser light

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?