An object located near the surface of Earth has a weight of a 245 N object?
• What is the mass of the object?
• What is the weight of the object on Mars where the gravity is
3.72 m/s2

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?