A 119-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 33.9 ° below the horizontal. The coefficient of kinetic friction is 0.216. What should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero?

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?

Which best term to describe a chemical reaction that absorbs energy from its surroundings? a.thermal conductor b.thermal insulator c.endothermic d.exothermic