1

IIT-JEE 2010 Paper 1 Offline

Numerical

+3

-0

A piece of ice (heat capacity = 2100 J kg

^{-1}^{o}C^{-1}and latent heat = 3.36 $$ \times $$ 10^{5}J kg^{-1}) of mass m grams is at - 5^{o}C at atmospheric pressure. It is given 420 J of heat so that the ice starts melting. Finally when the ice-water mixture is in equilibrium, it is found that 1 gm of ice has melted. Assuming there is no other heat exchange in the process, the value of m isYour input ____

2

IIT-JEE 2010 Paper 1 Offline

Numerical

+3

-0

Two spherical bodies A (radius 6 cm ) and B (radius 18 cm ) are at temperature T

_{1}and T_{2}, respectively. The maximum intensity in the emission spectrum of A is at 500 nm and in that of B is at 1500 nm. Considering them to be black bodies, what will be the ratio of the rate of total energy radiated by A to that of B?Your input ____

3

IIT-JEE 2010 Paper 2 Offline

Numerical

+3

-0

A diatomic ideal gas is compressed adiabatically $${1 \over {32}}$$ of its initial volume. If the initial temperature of the gas is T

_{i}(in Kelvin) and the final temperature is a T_{i}, the value of $$a$$ isYour input ____

4

IIT-JEE 2009 Paper 2 Offline

Numerical

+3

-1

A metal rod AB of length 10x has its one end A in ice at 0$$^\circ$$C and the other end B in water at 100$$^\circ$$C. If a point P on the rod is maintained at 400$$^\circ$$C, then it is found that equal amounts of water and ice evaporate and melt per unit time. The latent heat of evaporation of water is 540 cal/g and latent heat of melting of ice is 80 cal/g. If the point P is at a distance of $$\lambda x$$ from the ice end A, find the value of $$\lambda$$. (Neglect any heat loss to the surrounding.)

Your input ____

Questions Asked from Heat and Thermodynamics (Numerical)

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