AIEEE 2004 | Heat and Thermodynamics Question 432 | Physics

Two thermally insulated vessels $$1$$ and $$2$$ are filled with air at temperatures $$\left( {{T_1},{T_2}} \right),$$ volume $$\left( {{V_1},{V_2}} \right)$$ and pressure $$\left( {{P_1},{P_2}} \right)$$ respectively. If the value joining the two vessels is opened, the temperature inside the vessel at equilibrium will be

$${T_1}{T_2}\left( {{P_1}{V_1} + {P_2}{V_2}} \right)/\left( {{P_1}{V_1}{T_2} + {P_2}{V_2}{T_1}} \right)$$

$$\left( {{T_1} + {T_2}} \right)/2$$

$${{T_1} + {T_2}}$$

$${T_1}{T_2}\left( {{P_1}{V_1} + {P_2}{V_2}} \right)/\left( {{P_1}{V_1}{T_1} + {P_2}{V_2}{T_2}} \right)$$

AIEEE 2004

MCQ (Single Correct Answer)

-1

If the temperature of the sun were to increase from $$T$$ to $$2T$$ and its radius from $$R$$ to $$2R$$, then the ratio of the radiant energy received on earth to what it was previously will be

$$32$$

$$16$$

$$4$$

$$64$$

AIEEE 2004

MCQ (Single Correct Answer)

-1

One mole of ideal monatomic gas $$\left( {\gamma = 5/3} \right)$$ is mixed with one mole of diatomic gas $$\left( {\gamma = 7/5} \right)$$. What is $$\gamma $$ for the mixture? $$\gamma $$ Denotes the ratio of specific heat at constant pressure, to that at constant volume

$$35/23$$

$$23/15$$

$$3/2$$

$$4/3$$

AIEEE 2003

MCQ (Single Correct Answer)

-1

''Heat cannot by itself flow from a body at lower temperature to a body at higher temperature'' is a statement or consequence of :

second law of thermodynamics

conservation of momentum

conservation of mass

first law of thermodynamics