PHGY 210 Final: 2008 FINAL EXAM

Under these conditions, which of the following statements istrue?

a,Steam burns the skin worse than hot water because the thermalconductivity of steam is much higher than that of liquidwater.
b,Steam burns the skin worse than hot water because the latent heatof vaporization is released as well.
c,Hot water burns the skin worse than steam because the thermalconductivity of hot water is much higher than that of steam.
d,Hot water and steam both burn skin about equally badly.

Which of the following states the relevance of the first law of thermodynamics to biology?

A) Energy is destroyed as glucose is broken down during cellular respiration
B) Energy can be freely transformed among different forms as long as the total energy is conserved.
C) Photosynthetic organisms produce energy in sugars from sunlight.
D) The total energy taken in by an organism must be greater than the total energy stored or released by the organism.
E) Living organisms must increase the entropy of their surroundings

Which of the following statements are IMPOSSIBLE? Choose allthat apply.

____ A perfectly functioning hydraulic had a pressure of 24 psi inthe fluid near the small piston and a pressure of 24 psi in thefluid near the big piston.

____ A 31 L container displaced 34 L of water when partiallysubmerged

____ A substance underwent condensation during which itstemperature changed 5 K.

____ A 24 N brick was fully submerged in water. The buoyant forceon the brick was 15 N. As a direct result, the brick sank.

____ Last Wednesday, the Sun heated the Moon via conduction.

____ The temperature inside a physics laboratory chamber wasmeasured to be 18 °F.