What is the minimum diameter of a mirror on a telescope that would allow you to resolve objects with angular separation of 3.5 cross times 10 to the power of negative 5 end exponent radians ? Assume an average wavelength of 550 nm for the light received.

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

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?