Properties of Solids & Liquids (KVPY Stream-SA (Class 11) Physics): Questions 11 - 13 of 27

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Question number: 11

» Properties of Solids & Liquids » Pressure Due to a Fluid Column

MCQ▾

Question

Water flows through a horizontal pipe of variable cross-section. The pressure of water is p at a point where the flow velocity is v. If ρ is the density of the water, the pressure at a point where the flow velocity is 3v will be,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 12

» Properties of Solids & Liquids » Application of Surface Tension

Appeared in Year: 2014

MCQ▾

Question

A machine is blowing spherical soap bubbles of different radii filled with helium gas. It is found that if the bubbles have a radius smaller than 1 cm, then they sink to the floor in still air. Larger bubbles float in the air. Assume that the thickness of the soap film in all bubbles is uniform and equal. Assume that the density of soap solution is same as that of water (= 1000 kg m–3). The density of helium inside the bubbles and air are 0.18 kg m–3 and 1.23 kg m–3, respectively. Then the thickness of the soap film of the bubbles is (note 1 μm = 10–6 m)

Choices

Choice (4) Response

a.

7.00 μm

b.

0.50 μm

c.

1.50 μm

d.

3.60 μm

Question number: 13

» Properties of Solids & Liquids » Specific Heat Capacity

Appeared in Year: 2013

MCQ▾

Question

A 10.0 W electrical heater is used to heat a container filled with 0.5 kg of water. It is found that the temperature of the water and the container rise by 3 K in 15 minutes. The container is then emptied, dried, and filled with 2 kg of oil. It is now observed that the same heater raises the temperature of the container-oil system by 2 K in 20 minutes. Assuming no other heat losses in any of the processes, the specific heat capacity of the oil is.

Choices

Choice (4) Response

a.

b.

c.

d.

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