Which contributions did johannes kepler make? check all that apply. he revived aristotle's model of the solar system. he solved ptolemy's model by proving elliptical orbits. he proved galileo's calculations were incorrect. he determined that planets move faster when closer to the sun. he discovered laws of planetary motion.

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

How do the forces acting on a boat compare to the force acting on a plane ?