Question

State reason for the observation that the smeel of lighted incense stick reaches you several meters away but to get the smell form an unlit incense stick you have to go close ?

Answer 1

because kinetic energy is directly proportional to the temperature .as we increase the temperature the particles of that stick mix with air and go long away

Answer 2

When molecules of some volatile substances from hot sizzling food diffuse into air and reach the odur sensitive part of our nose we have the perception of smell.

At higher temperature of molecules diffuse into air at a faster rate and therefore travel long distances.

Hence the smell of hot sizzling food reaches as quickly even when we are several metres away.

While on the contrary , when the food is called the vapour diffuse is at a slower rate and therefore does not travel longer distances.

So, one has to come closer to have the perception of smell.