Heat Question (Chapter 10) FEW Clarifications:
Conduction:
Which kettle allows water to boil first? Kettle A: Placed on top
of a wire gauze supported by tripod stand and heated by a flame.
Kettle B: Placed on another tripod stand heated by a flame WITHOUT
wire gauze.
Ans is Kettle B because wire gauze allows heat to be conducted
away faster.
HOWEVER, doesn't it make sense that Kettle A allows heat to be
conducted via the wire gauze to heat up the water in the kettle
whereas Kettle B does not as it lacks the wire gauze? So water in
kettle A should boil first?
Which is the correct interpretation? Is my concept of conduction
wrong?
Radiation:
A solar panel has a dull black surface to absorb more heat
energy from the Sun. However, doesn't it also make sense that heat
will be loss/radiated faster also as black surfaces are good
radiators? Is my concept of radiation wrong again?