Question # 1

Change in which parameter determines the work done by a gas during adiabatic prcoess.

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volume

Pressure

Temperature

Weight

In onw cycle of a steam engine there are how many dead centres.

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1

2

3

zero

The specific heat of an ideal gas values as

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To

T1

T2

T3

Which of the following has negative specific heat

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Ne

CO2

O2

Sturated vapours

Which of the given geometries will result in the largest convection consfficient.

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Vertical plate

Diagonal plate

horizontal plate facing upwards

Horizontal plate facing downwards

The specific heat capacity of the body depends upon.

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the heat given to it

Mass of the body

Temperature raised

Material of the body

The heat accepted and rejected by a Carnot engine operating between two heat reservoirs defines.

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The efficiency of the working substance of the engine

the ideal gas scale of temperature

The ratio of the absolute temperature of the reservoirs

The thermal capacity of the working substance

The expression PV/KT represents.

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Number of moles of the gas

Number of molecules in the gas

Total mass of the gas

Density of the gas

Which of the following should not change in an Isothermal process.

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Volume

Pressure

Temperature

All of these

The term used for heat capacity per unit mass is.

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Latent heat

Specific heat

Energy density

Specific energy

The normal Human body temperature in Fahrenheit scale is.

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32 ^oF

40 ^oF

98.4^oF

212 ^oF

Internal energy of a gas decreased when

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It gains heat

Change in cycle

Change in adiatatic

Change in reversible

Thermal conduction in metals differs from thermal conduction in insulators,. The reasons for this is that , in metals heat can be transported by.

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Electrons

Lattice vibrations

Photons

Positive ions

How does heat transfer between objects.

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From cold to hot objects

From hot to cold objects

By electromagnetic radiations

From hotter to hottest objects.

Pressure of a gas depends upon

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Only on the molecular speed

Only on the speed of molecules on a unit volume

Only on the mass of molecules

Number of molecules mass and speed in a unit volume

What makes the air coming out of a punctured tyre cool.

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Isothermal expansion

Adiabatic expension

Flow at high speed

Atmospheric pressure

The ratio of specific heat capacity to motor heat capacity of a body

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Is a universals cantante

Depends upon the mass of the body

Depends upon the molecular weight of the body

Is dimensionless

Which law states that if two systems are in thermal equilibrium with a third system they are also in the thermal equilibrium with each other.

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Third law of thermodynamics

Second law of thermodynamics

First law of thermodynamics

Zeroth law of thermodynamics

On what factor the internal energy of a thermodynamic system depend upon.

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History

State

Process

Surroundings

Heat Carnot be transferred from a colder to a hotter region unless work is done This is the statement of.

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Firs law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

Zeroth law of thermodynamcis

What is the heat required in Kilo joules when the temperature of 100 g of copper is raised thgough 20 K/. Specific heat capacity of copper is 0.4 x 10-3 kg -1 k-1

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0.4 kj

0.8 kj

400 kj

800 kj

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