4) Choose True or False. If False, choose the statement that makes it True.
A magnetic field is a region that surrounds a charged particle or object that can exert a force on other charged particles or objects.
False; An electric field is a region that surrounds a magnetic field that can exert a force on other charged particles or objects.
False; An electric field is a region that surrounds a charged particle or object that can exert a force on other charged particles or objects.
True​

What is created when solids,liquids,an gases mix with one another

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2

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.