What is the work done by a 20 newton force applied at an angle of 45.0° to move a box a horizontal distance of 40 meters? a. 8.0 × 102 joules b. 9.0 × 102 joules c. 5.6 × 102 joules d. 3.6 × 102 joules

Aneutron and a proton combine to form a nucleus. why does the mass of the nucleus differ from the sum of the masses of the individual nucleons?

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k