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Good and Bad Conductor of Heat

9 MinsPhysics
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REVISE WITH CONCEPTS

Applications of Thermal Conductivity

ExampleDefinitionsFormulaes

Water as Bad Conductor

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QUICK SUMMARY WITH STORIES

Important Questions

Three rods made of same material and having same cross-section have been joined as shown in figure. Each rod is of same length. The left and right ends are kept at and respectively. The temperature of the junction of the three rods will be

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In an experiment on the specific heat of a metal a 0.20 kg block of the metal at is dropped in a copper calorimeter (of water equivalent 0.025 kg) containing  of water at . The final temperature is . Compute the specific heat of the metal. If heat losses to the surroundings are not negligible, is your answer greater or smaller than the actual value for specific heat of the metal ? 

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Steam at is passed  into 20 g of water acquires a temperature of , the mass of water presents will be [Take specific heat of water 1 cal latent heat of steam = ]

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A geyser heats water flowing at the rate of per minute from to . If the geyser operates on a gas burner. What is the rate of consumption of the fuel if its heat of combustion is ?

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Work done in converting 1g of ice at -10C into steam at 100C is 

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A sphere of aluminium of mass 0.047 kg placed for sufficient time in a vessel containing boiling water, so that the sphere is at  .It is then immediately transferred to 0.14 kg copper calorimeter containing 0.25 kg of water at  . The temperature of water rises and attains a steady state at  .Calculate the specific h capacity of aluminium. Given :specific heat capacity of water is 4186 specific heat capacity of copper calorimeter is 385

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The quantities of heat required to raise the temperature of two solid copper spheres of radii  and through are in the ratio :

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1 mole of a gas with is mixed with 1 mole of a gas with then the value of for resulting mixture is 

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A liquid of mass m and specific heat c is heated to temperature 2T. Another liquid of mass m/2 specific heat 2c is heated to a temperature T. If these two liquids are nixed, the resulting temperature mixture is 

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The quantity of heat required to raise the temperature of unit mass of a substance through one degree Celsius is known as

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