Properties of Solids & Liquids (NEET (NTANational Eligibility cum Medical Entrance Test) Physics): Questions 158  161 of 190
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Question number: 158
» Properties of Solids & Liquids » Latent Heat
Question
A stationary object at 4° C and weighing 3.5 kg falls from a height of 2000 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 = 10 m/s ^{2} and latent heat of ice = 3.5 × 10 ^{5} joule/sec), then the object will melt
Choices
Choice (4)  Response  

a.  2 gm of ice 

b.  2 kg of ice 

c.  20 gm of ice 

d.  200 gm of ice 

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Question number: 159
» Properties of Solids & Liquids » Heat Transfer » Radiation
Question
A body cools from 90° C to 50° C in 10 minutes. If the room temperature is 25° C and assuming Newton’s law of cooling to hold good, the temperature of the body at the end of the next 10 minutes will be
Choices
Choice (4)  Response  

a.  56.40° C 

b.  34.61° C 

c.  46.75° C 

d.  42.85° C 

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Question number: 160
» Properties of Solids & Liquids » Specific Heat Capacity
Question
A beaker contains 400 gm of water. The heat capacity the beaker is equal to that of 20 gm of water. The initial temperature of water in the beaker is 20°C. If 240 gm hot water at 92°C is poured in it, the final temperature (neglecting radiation loss) will be nearest to
Choices
Choice (4)  Response  

a.  12.58°C 

b.  46.18°C 

c.  6.348°C 

d.  73.4°C 

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Question number: 161
» Properties of Solids & Liquids » Surface Energy and Surface Tension
Question
Radius of a capillary tube is 4 × 10 ^{3} m. A liquid of weight 5.20 × 10 ^{4} N may remain in the capillary tube then the surface tension of liquid will be
Choices
Choice (4)  Response  

a.  2.3 × 10 ^{2} N/m 

b.  20 N/m 

c.  2.0 × 10 ^{2} N/m 

d.  20 × 10 ^{3} N/m 

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