Aplane travels a distance of 500 m east while being accelerated uniformly from rest at the rate of 5.0 m/s2

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.