Plz ! which characteristics describe a maritime polar air mass? a. cold and humid air b. cold and dry air c. warm and humid air d. warm and dry air.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)