Properties of Solids & LiquidsLatent Heat (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 1  4 of 7
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Question number: 1
» Properties of Solids & Liquids » Latent Heat
Question
A lead bullet at 27° C just n tits when, stopped by an obstacle. Assuming that 25 % of heat is absorbed by the obstacle, then the velocity of the bullet at the time of striking (M. P. of lead = 327°C, specific heat of lead = 0.03 cal/gm °C, latent heat of fusion of lead = 6 cal/gm and J = 4.2 joule/cal)
Choices
Choice (4)  Response  

a.  307.5 m/sec 

b.  1230 m/sec 

c.  410 m/sec 

d.  Question does not provide sufficient data or is vague 

Question number: 2
» Properties of Solids & Liquids » Latent Heat
Question
A lead bullet at 25°C just n tits when stopped by an obstacle. Assuming that 25 % of heat is absorbed by the obstacle, then the velocity of the bullet at the time of striking (M. P. of lead = 320°C, specific heat of lead = 0.02 cal/gm°C, latent heat of fusion of lead = 6 cal/gm and J = 4.2 joule/cal)
Choices
Choice (4)  Response  

a.  4.010 m/sec 

b.  0.365 m/sec 

c.  307.5 m/sec 

d.  None of the above 

Question number: 3
» Properties of Solids & Liquids » Latent Heat
Assertion (Ꭺ)
Latent heat of fusion of ice is 336000 J kg ^{1}
Reason (Ꭱ)
Latent heat refers to change of state without any change in temperature.
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are false 

b.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

c.  Ꭺ is false but Ꭱ is true 

d.  Ꭺ is true but Ꭱ is false 

Question number: 4
» Properties of Solids & Liquids » Latent Heat
Question
A bullet moving with a uniform velocity v, stops sudden after hitting the target and the whole mass melts be m, specific heat S, initial temperature 28°C, melting point 375 °C and the latent heat L. Then v is given by
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

