Question

what are the modes of heat transfer?

Answer 1

 As the name suggests, heat transfer is the travel of heat or thermal energy from one object or entity to another.

This transfer takes place in three ways - conduction, convection, and radiation

• Conduction can occur in solids and fluids. It is the transfer of heat across a medium or objects which are in physical contact.

• Convection is the transfer of heat from a fluid to a solid surface or within a fluid.

• Matter that is at finite temperature emits energy in space in the form of electromagnetic waves. This is known as 'radiation'.

Answer 2

Solution:

Given:

=> Velocity of sound in gas at 27°C = 330 m/s.

To Find:

=> Velocity at 327°C.

Let velocity at 327°C be x,

So,

\sf{\implies \dfrac{27}{330}=\dfrac{327}{x}}⟹33027=x327

\sf{\implies \dfrac{330 \times 327}{27} = x}⟹27330×327=x

\sf{\implies x = 3996.6\;m/s}⟹x=3996.6m/s

{\boxed{\boxed{\bf{So,\;velocity\;at\;327^{\circ}C=3996.6\;m/s}}}}So,velocityat327∘C=3996.6m/s

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