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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: - Force required to move a mass of 1kg at rest on a horizontal rough plane
- A particle is kept at rest at the top of a sphere of diameter 42m.When disturbed slightly
- A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction
- A body of mass 10 kg is moving on an inclined plane of inclination 30°with an acceleration
- Which of the following are mechanical waves?
Topics: Thermodynamics
(179)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Force required to move a mass of 1kg at rest on a horizontal rough plane
- A particle is kept at rest at the top of a sphere of diameter 42m.When disturbed slightly
- A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction
- A body of mass 10 kg is moving on an inclined plane of inclination 30°with an acceleration
- Which of the following are mechanical waves?
Topics: Thermodynamics (179)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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