How much you react to a flashing red traffic light?

a. prepare to stop only if the light changes to red.

b. slow down and look for traffic ; there is no need to stop.

c. stop if you see another road user getting ready to cross.

d. treated like a stop sign and come to a complete stop.

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.