Is this correct I do not really understand what endothermic and exothermic are.
2 answers:
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Answer:
C) He should connect four 1-Ohm resistors in series
Explanation:
If there are n resistors connected in series, say , the total resistance of the connection is the sum of the individual resistances, ie for a series combination of n resistors, the following holds;
where is the total resistance.
Since the student needs a 4-Ohm resistor and the only available ones are 1-Ohm each, he should combine each of them in series.
Answer:
1.045 KW
Explanation:
Rate of heat transfer is determined with the rate of change of specific enthalpy of the air.
Using relation
Q= mCpΔT
=рVCpΔT
VCp (
=(101.35/0.287×297)×150×1.005(24-5)/1×60×6=1.045 KW