The mechanical equivalent of heat J is...

The mechanical equivalent of heat J is

has the same dimension as heat

has the same dimension as power

has the same dimension as energy

is dimensionless

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5g of a gas is contained in a rigid container and is heated from 15^@C to 25^@C . Specific heat capacity of the gas at constant volume is 0.172 cal g ^(-1)^@C^(-1) and the mechanical equivalent of heat is 4.2 J cal . Calculate the change in the internal energy of the gas.

Take the mechanical equivalent of heat as 4J // cal. A 10-gram bullet moving at 2000 m//s plunges into 1 kg of paraffin wax ( specific heat 0.7 cal // ( g^(@) C ) . The wax was initially at 20^(@)C . Assuming that all the bullet's energy heats the wax, its final temperature is

The mechanical equivalent of heat (1) has the same dimensional formula as heat (2) has the same dimensional formula as worked (3) has the same dimensional formula as energy (4) is dimensionless

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A large number of water drops, each of radius I, combine to have a drop of radius R. If the surface tension is T and mechanical equivalent of heat is J, the rise in heat energy per unit volume will be:

Define mechanical equivalent of heat. What is its value ?

1 cm^(3) of water at its boiling point absorbs 540 cal of heat to become steam with a volume of 1671 cm^(3) . If the atmospheic pressure is 1.013 xx 10^(5) N//m^(2) and the mechanical equivalent of heat = 4.19 J//cal , the energy spent in this process in overcoming intermolecular forces is

State Joule's law of equivalence between work and heat. Hence define mechanical equivalent of heat. Give its value.

A room at 20^@C is heated by a heater of resistence 20 ohm connected to 200 VV mains. The temperature is uniform throughout the room and the heati s transmitted through a glass window of area 1m^2 and thickness 0.2 cm. Calculate the temperature outside. Thermal conductivity of glass is 0.2 cal//mC^@ s and mechanical equivalent of heat is 4.2 J//cal .

SL ARORA-Thermal Properties of Matter-Exercise

Resistance of tungsten wire at 150^(@)C is 133 Omega. Its resistance t...
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Triple point of water is
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The mechanical equivalent of heat J is
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During constant temperature, we feel colder on a day when the relative...
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When a body is heated, then maximum rise will be in its
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A composite rod made of copper (alpha =1.8xx10^-5 K^-1) and steel (alp...
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If the temperature of a rod is increased by 10^@C, its length increase...
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The volume of a gas at 20^(@)C is 100 cm 3 at normal pressure. If it i...
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The coefficient of volumetric expansion of mercury is 18xx10^(-5)//^(...
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Coefficient of real expension of mercury is 0.18 xx 10^(-3//@)C. If th...
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The density of a substance at 0^(@)C is 10 g//c c and at 100^(@)C, its...
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A uniform metal rod is used as a bar pendulum. If the room temperature...
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Calculate the presure required to stop the increases in volume of a co...
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A clock which keeps correct time at 20^(@)C is subjected to 40^(@)C. I...
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When water is heated from 0^@C to 20^@C its volume
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Amount of heat required to raise the temperature of a body through 1 K...
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Specific heat of a substance is a function of its
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A body of mass 5 kg moving with a velocity 10 m/s collides with anothe...
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Water falls from a height 500 m. what is the rise in temperature of wa...
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50 g of ice at 0^@C is mixed with 50 g of water at 80^@C . The final t...
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