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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: - A block of mass m moving at a velocity v collides with another block of mass 2m
- The turn ratio of a transformer is 1:2. An electrolytic dc cell of emf 2 volt is connected
- Huygen’s wave theory could not explain
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Topics: Thermodynamics
(179)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A block of mass m moving at a velocity v collides with another block of mass 2m
- The turn ratio of a transformer is 1:2. An electrolytic dc cell of emf 2 volt is connected
- Huygen’s wave theory could not explain
- Four point masses, each of value m, are placed at the corners of a square ABCD
- A particle is moving in a circle with uniform speed v. In moving from a point to another
Topics: Thermodynamics (179)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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