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kumpel [21]
3 years ago
5

A thermodynamic system undergoes a process in which its internal energy decreases by 1,477 J. If at the same time 678 J of therm

al energy is transferred to it, how much work (in J) is done by the system?
Physics
1 answer:
Andrews [41]3 years ago
5 0

Answer:2155 J

Explanation:

Given

Change in Internal energy \Delta U=-1477 J i.e. decrease in Internal Energy

Heat added to system Q=678 J

According First law for a system

dQ=dU+dW

678=-1477+dW

dW=2155 J

Thus 2155 J of work is done by system                      

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3 years ago
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2 years ago
The resonance frequency of a driven RLC circuit is 1300 Hz. a. What is the resonance frequency if the resistance R is doubled?
Marta_Voda [28]

Answer:

a) f(R0) = 1000 Hz

b) f(R0) = 707.11 Hz

c) f(R0) = 707.11 Hz

d) f(R0) = 1000 Hz

e) f(R0) = 1000 Hz

Explanation:

Let R be the resistance of the circuit, L be the inductance of the circuit, C be the capacitance of the circuit, E_0 be the peak emf of the circuit, f be the frequency f(R) be initial resonance frequency of the circuit and f(R0) be the new respective resonance frequency in each question.

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f(R0) = 7071 Hz

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f(R0)/1000 = √C/√2C

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