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Draw a P – V diagram for Liquid and gas at various temperatures showing critical
asked
Mar 19, 2022
in
11th Physics
marks1
chapter11
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0
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0
answers
If for a gas, `R/(C_V)= 0.67` then which gas is this:- monatomic, diatomic and tri
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Mar 19, 2022
in
11th Physics
marks2
chapter11
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A 50g lead bullet, specific heat `0.02 cal |g | '^C` is initially at `30^oC`. It is fixed vertically upward with a speed of `840m |s` and on returning to the starting level strikes a cake of ice at `0^oC`. How much ice is melted? Assume that all energy is spent in melting ice
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Mar 19, 2022
in
11th Physics
marks2
chapter11
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A gas mixture consists of 2 moles of oxygen and 4 moles of argon at temperature T. If we neglect all vibration modes, find the total energy of the
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Mar 19, 2022
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11th Physics
marks2
chapter11
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Show that `C_P - C_V = R` Where `[C_P =` specific heat at constant pressure ; `C_V =` specific heat at constant volume and R = Universal Gas constant] for an ideal
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Mar 19, 2022
in
11th Physics
marks2
chapter11
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How do you justify that when a body is being heated at melting point, the temperature remains
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Mar 19, 2022
in
11th Physics
marks2
chapter11
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If half mole of helium is contained in a container at S. T. P. How much heat energy is needed to double the pressure of the gas, keeping the volume of the gas constant? Given specific heat of gas `= 3J | g
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Mar 19, 2022
in
11th Physics
marks3
chapter11
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Draw and explain a P – T diagram for water showing different
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Mar 19, 2022
in
11th Physics
marks2
chapter11
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From what height should a piece of ice fall so that it completely melts? Only one – quarter of heat produced is absorbed by the ice. Given latent heat of ice is `3.4 × 10^5 J | Kg` and acceleration due to gravity, `g = 10m| s^2`
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Mar 19, 2022
in
11th Physics
marks2
chapter11
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On a winter night, you feel warmer when clouds cover the sky than when sky is clear.
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Mar 19, 2022
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11th Physics
marks1
chapter11
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If a body is heated from `27^o C` to `927^oC` then what will be the ratio of energies of radiation
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Mar 19, 2022
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11th Physics
marks1
chapter11
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Two rods A and B are of equal length. Each rod has its ends at temperatures T1 and T2. What is the condition that will ensure equal rates of flow of heat through the rods A and
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Mar 19, 2022
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11th Physics
marks2
chapter11
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A layer of ice 10cm thick is formed on a pond. The temperature of air is `– 10^oC`. Calculate how long it will take for the thickness of ice to increase by 1mm. Density of ice` = 1g|cm^3`; Thermal conductivity of ice `= 0.005Cal|s|cm|^oC`; Latent heat of ice `= 80Cal|g`
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Mar 19, 2022
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11th Physics
marks2
chapter11
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Two conducting slabs of thermal conductivities K1 and K2 are joined as shown in the figure. The temperature of the ends of slab are `θ_1 and θ_2 (θ_1 > θ_2)`. Find the final temperature of
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Mar 19, 2022
in
11th Physics
marks2
chapter11
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The ends of the two rods of different materials with their thermal conductivities, radii of cross – section and length in the ratio 1:2 are maintained at the same temperature difference. If the rate of flow of heat through the larger rod is 4 cal |s, what is the rate of flow through the shorter
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Mar 19, 2022
in
11th Physics
marks2
chapter11
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What are thermal radiation? Write its properties of thermal
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Mar 19, 2022
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11th Physics
marks2
chapter11
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An indirectly heated filament is radiating maximum energy of wavelength `2.16xx 10^(-7)m`. Find the net amount of heat energy lost per second per unit area, the temperature of surrounding air is `13^oC`. Given `b = 2.88xx10^(-3) mk, σ = 5.77xx10(-8)
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Mar 19, 2022
in
11th Physics
marks2
chapter11
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Animals in the forest find shelter from cold in holes in the snow.
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Mar 19, 2022
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11th Physics
marks2
chapter11
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A brass boiler has a base area of `0.15m^2` and thickness 1.0cm. It boils water at the rate of 6kg| min when placed on a gas stove, Estimate the temperature of the part of flame in contact with the boiler. Thermal conductivity of brass `= 10^9J|s|m|'^oC`, heat of vaporization of water `=
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Mar 19, 2022
in
11th Physics
marks2
chapter11
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How do you explain heating of rooms based on principle of
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Mar 19, 2022
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11th Physics
marks2
chapter11
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