Which three particles make up an atom?
positives, negatives, and electrons.
protons, neutrons, and electrons.
protons, neutrons, and isotopes.
neutrons, isotopes, and electrons.

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

Who was the first scientist to measure speed as distance over time?

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)