MHT CET 2021 23th September Morning Shift | Heat and Thermodynamics Question 278 | Physics

If $$\mathrm{m}$$' represents the mass of each molecules of a gas and $$\mathrm{T}$$' its absolute temperature then the root mean square speed of the gas molecule is proportional to

$$\mathrm{m^{-\frac{1}{2}}T^{\frac{1}{2}}}$$

$$\mathrm{m^{\frac{1}{2}}T^{-\frac{1}{2}}}$$

$$\mathrm{m^{\frac{1}{2}}T^{\frac{1}{2}}}$$

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

-0

An ideal gas at pressure '$$p$$' is adiabatically compressed so that its density becomes twice that of the initial. If $$\gamma=\frac{c_p}{c_v}=\frac{7}{5}$$, then final pressure of the gas is

$$\frac{7}{5}$$p

2.63p

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

-0

Which one of the following statements is wrong for an isobaric process?

The pressure of the system remains constant

There is change in volume, when work is done

Temperature of the system remains constant

Energy exchanged is used to do work to change internal energy

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

-0

For a perfectly black body, coefficient of emission is

zero

infinity

unity

less than one (non-zero)

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