Luces intersect each Lesson exercise
uswer the following questions
Define electric potential energy.
2. Explain the concept of electric potential difference.
2. What is the relation between electric potential energy and potential dif-
4. What is the other name given to a potential of a single point charge?
3. What are the uses of equipotential surfaces?
ference?
6. Find the magnitude of a charge that can be moved from infinity to a point
in an electric field where the potential is 20V, by spending 600J of work.
12​

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)