The heat of sun reaches to us according to

Heat and Mass Transfer
The heat of sun reaches to us according to

None of these

Convection

Conduction

Radiation

None of these

Convection

Conduction

Radiation

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Heat and Mass Transfer
In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by

Hr (time)

Sq. m (area)

K.cal (heat)

°C (temperature)

Hr (time)

Sq. m (area)

K.cal (heat)

°C (temperature)

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Heat and Mass Transfer
The emissive power of a body depends upon its

Physical nature

Wave length

All of these

Temperature

Physical nature

Wave length

All of these

Temperature

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Heat and Mass Transfer
Fourier's law of heat conduction is valid for

Regular surfaces having non-uniform temperature gradients

One dimensional cases only

Three dimensional cases only

Two dimensional cases only

Regular surfaces having non-uniform temperature gradients

One dimensional cases only

Three dimensional cases only

Two dimensional cases only

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Heat and Mass Transfer
Thermal conductivity of a material may be defined as the

All of these

Quantity of heat flowing in one second through one cm cube of material when opposite faces are maintained at a temperature difference of 1°C

Heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces

Quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1°C

All of these

Quantity of heat flowing in one second through one cm cube of material when opposite faces are maintained at a temperature difference of 1°C

Heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces

Quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1°C

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Heat and Mass Transfer
Heat transfer by radiation mainly depends upon

Its temperature

Nature of the body

All of these

Kind and extent of its surface

Its temperature

Nature of the body

All of these

Kind and extent of its surface

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Heat and Mass Transfer

Heat and Mass Transfer The heat of sun reaches to us according to

Heat and Mass Transfer In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by

Heat and Mass Transfer The emissive power of a body depends upon its

Heat and Mass Transfer Fourier's law of heat conduction is valid for

Heat and Mass Transfer Thermal conductivity of a material may be defined as the

Heat and Mass Transfer Heat transfer by radiation mainly depends upon

Heat and Mass Transfer
The heat of sun reaches to us according to

Heat and Mass Transfer
In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by

Heat and Mass Transfer
The emissive power of a body depends upon its

Heat and Mass Transfer
Fourier's law of heat conduction is valid for

Heat and Mass Transfer
Thermal conductivity of a material may be defined as the

Heat and Mass Transfer
Heat transfer by radiation mainly depends upon