Question

Solution

Correct option is Heat energy in copper block The amount of ice that melts will be maximum if the entire heat energy of the copper block is used up in melting ice. Now, of heat energy is needed to melt 1 kg of ice into water. Therefore, the amount of ice melted by J of heat energy is SIMILAR QUESTIONS

Q1

The density of a liquid of coefficient of cubical expansion . When the liquid is heated to a temperature T, the change in density will be

Q2

Two rods of different materials having coefficient of thermal expansion and Young’s modulii Y1 and Y2 are fixed between two rigid and massive walls. The rods are heated to the same temperature. If there is no bending of the rods, the thermal stresses developed in them are equal provided

Q3

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Q4

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Q5

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Q6

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Q7

One mole of oxygen is heated from 0oC, at constant pressure, till its volume increases by 10%. The specific heat of oxygen, under these conditions is 0.22 cal g – 1 K – 1. The amount of heat required (in joules) is

Q8

A drilling machine of power P watts is used to drill a hole in copper block of mass M kg. If the specific heat of a copper is s J and 40% of  the power is lost due to heating of the machine, the rise in the temperature of the block in T seconds will be (in oC)

Q9

A geyser, operating on LPG (liquefied petroleum gas) heats water flowing at the rate of 3.0 litres per minute, from 27oC to 77oC. If the heat of combustion of LPG is , how much fuel in grams is consumed per minute?

Q10

The dimensions of the coefficient of thermal conductivity are