1
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

The temperature of a gas is $$-50^{\circ} \mathrm{C}$$. To what temperature the gas should be heated so that the rms speed is increased by $$3$$ times?

A
$$3295^{\circ} \mathrm{C}$$
B
$$3097 \mathrm{~K}$$
C
$$223 \mathrm{~K}$$
D
$$669^{\circ} \mathrm{C}$$
2
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

The ratio of radius of gyration of a solid sphere of mass $$M$$ and radius $$R$$ about its own axis to the radius of gyration of the thin hollow sphere of same mass and radius about its axis is :-

A
$$5: 3$$
B
$$2: 5$$
C
$\sqrt{5}: \sqrt{3}$
D
$\sqrt{3}: \sqrt{5}$
3
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

A Carnot engine has an efficiency of $$50 \%$$ when its source is at a temperature $$327^{\circ} \mathrm{C}$$. The temperature of the sink is :-

A
$$15^{\circ} \mathrm{C}$$
B
$$100^{\circ} \mathrm{C}$$
C
$$200^{\circ} \mathrm{C}$$
D
$$27^{\circ} \mathrm{C}$$
4
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

A bullet is fired from a gun at the speed of $$280 \mathrm{~ms}^{-1}$$ in the direction $$30^{\circ}$$ above the horizontal. The maximum height attained by the bullet is

$$\left(g=9.8 \mathrm{~ms}^{-2}, \sin 30^{\circ}=0.5\right)$$:-

A
2000 m
B
1000 m
C
3000 m
D
2800 m
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