How much work is accomplished when a force of 400 n pushes a box across the floor for a distance of 10 meters? a. 4000 j b. 40 n c. 4000 n d. 40 j

Ablock of steel has a density of 0.29lbs per cubic inch. if the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight? a. 0.29lbs b. 0.58lbs c. 0.87lbs d. 1lbs

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?