1
JEE Main 2021 (Online) 26th August Morning Shift
Numerical
+4
-1
Change Language
A soap bubble of radius 3 cm is formed inside the another soap bubble of radius 6 cm. The radius of an equivalent soap bubble which has the same excess pressure as inside the smaller bubble with respect to the atmospheric pressure is ................ cm.
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2
JEE Main 2021 (Online) 27th July Evening Shift
Numerical
+4
-1
Change Language
The water is filled upto height of 12 m in a tank having vertical sidewalls. A hole is made in one of the walls at a depth 'h' below the water level. The value of 'h' for which the emerging steam of water strikes the ground at the maximum range is ________ m.
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3
JEE Main 2021 (Online) 27th July Morning Shift
Numerical
+4
-1
Change Language
A stone of mass 20 g is projected from a rubber catapult of length 0.1 m and area of cross section 10$$-$$6 m2 stretched by an amount 0.04 m. The velocity of the projected stone is ______________ m/s.

(Young's modulus of rubber = 0.5 $$\times$$ 109 N/m2)
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4
JEE Main 2021 (Online) 22th July Evening Shift
Numerical
+4
-1
Out of Syllabus
Change Language
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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