a charged particle is located in an electric field where the magnitude of the electric field is 2.0 x 10^3 newtons per coulomb. If the magnitude of the electrostatic force exerted on the particle is 3.0 x 10^-3, what is the charge of this particle?

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)