You were driving your car to utd at a speed of 35 miles per hour. you stopped at the floydcampbell intersection with the signal light showing red (wavelength = 6.45 × 10–5 cm). after 30 sec, the signal becomes green whose frequency is 5.80 × 1014 s –1 . which light has higher energy?

On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?