Question

Why do different substances produce electromagnetic waves when they are heated up or energized?

Answer 1

Due to the Prevost's Theory of Heat Exchange.It says that every body which has its temperature greater than O kelvin will absorb and radiate all kind of radiations.

If temperature of the body is greater than that of surrounding then the energy radiated will be greater than the energy absorbed.

If temperature of the body is less than that of surrounding then energy absorbed will be greater than the energy radiated.

If the temperature of the body and that of surrounding is same then a body and surrounding will be in thermal equilibrium.

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