Properties of Solids & Liquids (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 34  38 of 190
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Question number: 34
» Properties of Solids & Liquids » Heat Transfer » Conduction
Question
A solid copper sphere (density ρ and specific heat capacity c) of radius r at an initial temperature 200 K is suspends inside a chamber whose walls are at almost 0 K. The time required (in µ s) for the temperature of the sphere to drop to 100 K is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 35
» Properties of Solids & Liquids » Thermal Expansion
Question
The coefficient of volumetric expansion of mercury is 18 × 10 ^{5} / ^{o} C. A thermometer bulb has a volume 10 ^{6} m ^{3} and cross section of stem is 0.006 cm ^{2}. Assuming that bulb is filled with mercury at 0°C then the length of the mercury column at 100°C is
Choices
Choice (4)  Response  

a.  9.2 mm 

b.  0.03 m 

c.  4.5 cm 

d.  7.4 m 

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Question number: 36
» Properties of Solids & Liquids » StressStrain Relationship
Question
A wire of length lm is stretched by a force of 10 N. The area of crosssection of the wire is 2 × 10 ^{6} m ^{2} and Y is 2 × lO ^{6 } N/m ^{2}. Increase in length of the wire will be 
Choices
Choice (4)  Response  

a.  2.5 × 10 ^{5} mm 

b.  2.5 × 10 ^{5} cm 

c.  2.5 × 10 ^{5} m 

d.  Question does not provide sufficient data or is vague 

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Passage
Read the passage given below and answer the questions that follows:
A brass ball of mass 100 gm is heated to 100°C and then dropped into 200 gm of turpentine in a calorimeter at 15°C. The final temperature is found to be 23°C. Take specific heat of brass as 0.092 cal/gm°C and water equivalent of calorimeter as 4 gm.
Question number: 37 (1 of 3 Based on Passage) Show Passage
» Properties of Solids & Liquids » Heat Transfer » Conduction
Question
Heat lost by the ball is approximately
Choices
Choice (4)  Response  

a.  710 cal 

b.  810 cal 

c.  610 cal 

d.  510 cal 

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Question number: 38 (2 of 3 Based on Passage) Show Passage
» Properties of Solids & Liquids » Heat Transfer » Conduction
Question
Heat gained by turpentine and calorimeter is approximately
Choices
Choice (4)  Response  

a.  511 cal 

b.  815 cal 

c.  704 cal 

d.  620 cal 

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