JEE Main 2020 (Online) 4th September Evening Slot | Properties of Matter Question 173 | Physics

A cube of metal is subjected to a hydrostatic pressure of 4 GPa. The percentage change in the length of the side of the cube is close to :
(Given bulk modulus of metal, B = 8 $$ \times $$ 10¹⁰ Pa)

0.6

1.67

JEE Main 2020 (Online) 4th September Evening Slot

MCQ (Single Correct Answer)

-1

Two identical cylindrical vessels are kept on the ground and each contain the same liquid of density d. The area of the base of both vessels is S but the height of liquid in one vessel is x₁ and in the other, x₂ . When both cylinders are connected through a pipe of negligible volume very close to the bottom, the liquid flows from one vessel to the other until it comes to equilibrium at a new height. The change in energy of the system in the process is:

gdS(x₂ + x₁)²

gdS$$\left( {x_2^2 + x_1^2} \right)$$

$${1 \over 4}gdS{\left( {{x_2} - {x_1}} \right)^2}$$

$${3 \over 4}gdS{\left( {{x_2} - {x_1}} \right)^2}$$

JEE Main 2020 (Online) 4th September Morning Slot

MCQ (Single Correct Answer)

-1

A air bubble of radius 1 cm in water has an upward acceleration 9.8 cm s^–2. The density of water is 1 gm cm^–3 and water offers negligible drag force on the bubble. The mass of the bubble is (g = 980 cm/s²).

1.52 gm

4.51 gm

3.15 gm

4.15 gm

JEE Main 2020 (Online) 3rd September Evening Slot

MCQ (Single Correct Answer)

-1

Out of Syllabus

A metallic sphere cools from 50^oC to 40^o in 300 s. If atmospheric temperature around is 20^oC, then the sphere’s temperature after the next 5 minutes will be close to :

35^oC

31^oC

33^oC

28^oC

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