Warm-Up Exercise for lecture 22

Due 8:00 am, Thurs, 12 Nov 2009

Physics 105, Fall 2009

Which of the following is not a way heat can be transferred:
conduction
convection
perpetuation
radiation

The work done by a gas when expanding can be calculated by:
the area under the curve representing the process in the P-T diagram
the area under the curve representing the process in the P-V diagram
the area under the curve representing the process in the T-V diagram

The first law of thermodynamics is a statement of:
conservation of energy
conservation of (regular) momentum
conservation of angular momentum
conservation of mass

Ralph recently saw a sign while driving that said: "Caution: Bridge freezes before road". He is wondering how that can be the case when the road and the bridge are in thermal contact with each other. Plus, they are both in the same environment. What can you tell him to help him understand?