MHT CET 2024 4th May Morning Shift | Heat and Thermodynamics Question 67 | Physics

An insulated container contains a monoatomic gas of molar mass ' $m$ '. The container is moving with velocity ' $V$ '. If it is stopped suddenly, the change in temperature is ( $R=$ gas constant)

$\frac{\mathrm{mV}^2}{5 \mathrm{R}}$

$\frac{\mathrm{mV}^2}{3 \mathrm{R}}$

$\frac{\mathrm{mV}^2}{7 \mathrm{R}}$

$\frac{m V^2}{9 R}$

MHT CET 2024 4th May Morning Shift

MCQ (Single Correct Answer)

-0

In an isobaric process of an ideal gas, the ratio of work done by the system to the heat supplied $\left(\frac{W}{Q}\right)$ is

$\frac{1}{\gamma-1}$

$\gamma$

$\frac{\gamma}{\gamma-1}$

$\frac{\gamma-1}{\gamma}$

MHT CET 2024 4th May Morning Shift

MCQ (Single Correct Answer)

-0

A sphere is at temperature 600 K . In an external environment of 200 K , its cooling rate is ' $R$ ' When the temperature of the sphere falls to 400 K , then cooling rate ' $R$ ' will become

$\frac{3}{16} \mathrm{R}$

$\frac{9}{16} R$

$\frac{16}{9} R$

$\frac{16}{3} R$

MHT CET 2024 3rd May Evening Shift

MCQ (Single Correct Answer)

-0

A gas expands in such a way that its pressure and volume satisfy the condition $\mathrm{PV}^2=$ constant. Then the temperature of the gas

will decrease.

will increase.

will not change.

may increase or decrease depending upon the values of pressure and volume.

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