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Physics 1 Marks Question

Mechanical Properties of Fluids · UP Board (UPMSP) STD 11 Science (UPMSP - English Medium). 2 questions.

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Question 11 Mark
This model of the atmosphere works for relatively small distances. Identify the underlying assumption that limits the model.
Answer
Temperature (T) remains constant only near the surface of the earth not at greater height.
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Question 21 Mark
Is surface tension a vector?
Answer
Surface tension $\Big[\sigma=\frac{\text{W.D.}}{\text{Changr in Surface Area}}\Big]$ so, $\sigma$ is not a vector as it is equal to the work done per unit change in surface area.
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