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Introduction to Internal Energy

7 MinsPhysics
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REVISE WITH CONCEPTS

Internal Energy (U)

ExampleDefinitionsFormulaes

Heat Internal Energy and Work

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QUICK SUMMARY WITH STORIES

Important Questions

A boy of mass 50 kg runs up a staircase of 45 steps in 9 s. If the height of each step of the staircase is 15 cm, find the power of the boy.

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An ideal gas is taken through a cycle as shown in the figure. If the net heat supplied in the cycle is , then work done by the gas in the process is

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One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the figure, The change in internal energy of the gas during the transition is:

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P-V diagram of an ideal gas is shown in figure. Work done by the gas in the process ABCD is:

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Two persons of masses and respectively, are at the opposite ends of the boat. The length of the boat is and weigh . The man walks to the man and sits with him. If the boat is in stil water the centre of mass of the system shifts by

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In a cyclic process, work done by the system is

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An ideal gas expands from volume to . This may be achieved by either of three processes: isobaric, isothermal and adiabatic. Let be the change in internal energy of the gas , Q be the quantity of heat added to the system and W be the work done by the system on the gas. Identify which of the following statements is false for ?

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 A thermodynamic process, 200 J of heat is given to a gas and 100 J of work is also done on it. The change in internal energy of the gas is

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For cyclic process which of the following quantity is zero?

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The internal energy of an ideal gas depends upon 

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