Properties of Solids & Liquids (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 137 - 141 of 190

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Question number: 137

» Properties of Solids & Liquids » Surface Energy and Surface Tension

MCQ▾

Question

In a surface tension experiment with a capillary tube water rises up to 0.1 m . If the same experiment is repeated on an artificial satellite, which is revolving around the earth, water will rise in the capillary tube up to heights of,

Choices

Choice (4) Response

a.

0.98 m

b.

0.1 m

c.

Full length of the capillary tube

d.

0.2 m

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Question number: 138

» Properties of Solids & Liquids » Latent Heat

MCQ▾

Question

A stationary object at 4°C and weighing 5.5 kg falls from a height of 6000 m on a snow mountain at 0°C. If the temperature of the object just before hitting the snow is 0°C and the object comes to rest immediately? (g = 10m/s 2 and latent heat of ice = 3.5 × 10 5 joule/sec), then the object will melt

Choices

Choice (4) Response

a.

2 kg of ice

b.

0.9438 kg of ice

c.

200 kg of ice

d.

2.346 gm of ice

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Question number: 139

» Properties of Solids & Liquids » Newton's Law of Cooling

MCQ▾

Question

A body initially at 80° C cools to 64° C in 5 minutes and to 52° C in 10 minutes. The temperature of the body after 15 minutes will be

Choices

Choice (4) Response

a.

42.7° C

b.

47°

c.

40° C

d.

35° C

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Question number: 140

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

The lengths and radii of two wires of same material are respectively L, 2L, and 2R, R. Equal weights are applied on then. If the elongations produced in them are l 1 and l 2 respectively then their ratio will be

Choices

Choice (4) Response

a.

4: 1

b.

2: 1

c.

8: 1

d.

1: 8

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Question number: 141

» Properties of Solids & Liquids » Heat Transfer » Conduction

MCQ▾

Question

A 5 cm thick ice block is there on the surface of water in a lake. The temperature of air is - 10° C; how much time it will take to double the thickness of the block (L = 80 cal/g, K ice = 0.004 erg/s-k, d ice = 0.92 g cm -3)

Choices

Choice (4) Response

a.

191 hours

b.

1 hour

c.

1.91 hours

d.

19.1 hours

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