A particle of charge q is placed in a uniform electric field of magnitude E. Consider the following statements about the resulting forces on the particle:
I. It has magnitude q E.
II. It is perpendicular to the direction of the field.
III. It is parallel to the direction of the field.

Which of these statement(S) is true?

A) I and III

b) I

c) III

d) II and I

e) II and III

f) II

g) all are true

h) none are true

In a set amount of time, a battery supplies 25j of energy to an electric circuit that includes two different loads. one of the loads produces 10 j of heat energy during this time interval. how much heat energy is produced by the second load in this time? explain your answer

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)

Why is the use of carbon-14 limited