ThermodynamicsThermal Equilibrium (KVPY StreamSA (Class 11) Physics): Questions 1  3 of 3
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Question number: 1
» Thermodynamics » Thermal Equilibrium
Appeared in Year: 2011
Question
The following three objects (1) a metal tray, (2) a block of wood, and (3) a woolen cap are left in a closed room overnight. Next day the temperature of each is recorded as T _{1}, T _{2} and T _{3} respectively. The likely situation is.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 2
» Thermodynamics » Thermal Equilibrium
Question
A magnesium piece of mass 30 g initially at 350 °C is dipped quickly and taken out of 1 kg of water, initially at 45° C. if the temperature of the magnesium piece immediately after being taken out of the water is found to be 180°C, what is the temperature of the water then? (Specific heat capacities of magnesium and water are 1020 J kg^{–1} K^{–1} and 4200 J kg^{–1}, respectively. )
Choices
Choice (4)  Response  

a.  23.5°C  
b.  48°C  
c.  38.65°C  
d.  46.24°C 
Question number: 3
» Thermodynamics » Thermal Equilibrium
Appeared in Year: 2014
Question
An aluminum piece of mass 50 g initially at 300 °C is dipped quickly and taken out of 1 kg of water, initially at 30° C. if the temperature of the aluminum piece immediately after being taken out of the water is found to be 160°C, what is the temperature of the water then? (Specific heat capacities of aluminum and water are 900 J kg^{–1} K^{–1} and 4200 J kg^{–1}, respectively. )
Choices
Choice (4)  Response  

a.  31.5°C  
b.  45°C  
c.  28.5°C  
d.  165°C 