Which characteristic accounts for the fact that red lights are used in dark rooms and DO NOT expose negatives during developing?

26.4 is about the right time

The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then to distribute the heat over the saucepan and to give heat to the water. the convection of the water distributing the heat within the water, till all the water is boiling

Your answer is 120miles 

Cvelocity of the