Question

Q2: Compute the heat flow in cal/s for a 19.0 cm long Cu 3.50 mm square rod with one

end held at 25.0 C and the other end at 35.0 C.

Q3: We have two identical objects – “A” at 201 K, and “B” at 251 K. How much faster

does B radiate heat then A? (ratio)

Q4: Estimate the fuel savings (percentage) you would get by turning down your house

thermostat from 70 F to 60 F for one entire day and night. (Assume the outside temperature is a

constant 30 F) Explain your reasoning!

Answer 1