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The internal energy change in a system that has absorbed 2 kcals of heat and done 500J of work is:
Options
(a) 6400 J
(b) 5400 J
(c) 7900 J
(d) 8900 J
Correct Answer:
7900 J
Explanation:
According to first law of thermodynamics Q = ∆U + W
∆U = Q – W = 2 x 4.2 x 1000 – 500 = 8400 – 500 = 7900 J
Related Questions: - In a series resonant LCR circuit, the voltage across R is 100 volts and R =1kΩ
- Copper and carbon wires are connected in series and the combined resistor is kept
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Topics: Thermodynamics
(179)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In a series resonant LCR circuit, the voltage across R is 100 volts and R =1kΩ
- Copper and carbon wires are connected in series and the combined resistor is kept
- If a solid ball of metal has a concentric spherical cavity with in it if the ball
- In an L-C-R series resonant circuit, the capacitance is changed from C to 4C.
- The potential difference applied to an X-ray tube is 5 kV and the current through it
Topics: Thermodynamics (179)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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