Statements on Thermodynamics and Energy – Rankers Physics
Topic: Thermal Physics
Subtopic: Thermodynamics

Statements on Thermodynamics and Energy

Consider the following statements:
(A) Temperature of a body is related to its average internal energy, not to the kinetic energy of motion of its centre of mass.
(B) The first law of thermodynamics is based on law of conservation of energy applied to any system in which energy transfer from or to the surrounding (through heat and work) is taken into account.
Based on above information, pick correct option.
Both statements (A) and (B) are true
Both statements (A) and (B) are false
Statement (A) is true while (B) is false
Statement (B) is true while (A) is false

Solution:

Statement (A) is correct because temperature measures internal, disordered molecular kinetic energy, not ordered bulk kinetic energy. Statement (B) is also correct because the first law of thermodynamics is simply the law of conservation of energy.

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