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Mechanical Properties of question bank (Physics)

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Q1.

The change in energy when a big dropis split in sma $\| n$ droplets is

(A)

$4 R^{2}\left(n^{2 / 3}-1\right) I$

(B)

$4 \pi R^{2}\left(n^{1 / 3}-1\right) T$

(C)

$4 \pi R^{2}\left(n^{-1 / 3}-1\right) T$

(D)

$4 \pi R^{2}\left[n^{-2 / 3}-1\right] T$

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Q2.

We consider a thermodynamic system. If $\Delta U$ represents the increase in its internal energy and $W$ the work done by the system, which of the following statements is true?

(A)

$\Delta U=-W$ is an adiabatic process

(B)

$\Delta U=W$ in an isothermal process

(C)

$\Delta U=-W$ in an isothermal process

(D)

$\Delta U=W$ in an adiabatic process

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