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JEE Main 2021 (Online) 22th July Evening Shift
Numerical
+4
-1
In 5 minutes, a body cools from 75$$^\circ$$C to 65$$^\circ$$C at room temperature of 25$$^\circ$$C. The temperature of body at the end of next 5 minutes is _________$$^\circ$$ C.
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2
JEE Main 2021 (Online) 20th July Evening Shift
Numerical
+4
-1
One mole of an ideal gas at 27$$^\circ$$ is taken from A to B as shown in the given PV indicator diagram. The work done by the system will be _________ $$\times$$ 10$$-$$1 J. [Given : R = 8.3 J/mole K, ln2 = 0.6931] (Round off to the nearest integer)

JEE Main 2021 (Online) 20th July Evening Shift Physics - Heat and Thermodynamics Question 120 English
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3
JEE Main 2021 (Online) 20th July Morning Shift
Numerical
+4
-1
In the reported figure, heat energy absorbed by a system in going through a cyclic process is ___________ $$\pi$$J.

JEE Main 2021 (Online) 20th July Morning Shift Physics - Heat and Thermodynamics Question 124 English
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4
JEE Main 2021 (Online) 18th March Morning Shift
Numerical
+4
-1
Two separate wires A and B are stretched by 2 mm and 4 mm respectively, when they are subjected to a force of 2 N. Assume that both the wires are made up of same material and the radius of wire B is 4 times that of the radius of wire A. The length of the wires A and B are in the ratio of a : b. Then a/b can be expressed as 1/x where x is _________.
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