To avoid confusion, cosmologists use the term ice to mean only frozen water; other frozen gases are called plasma.
a. true
b. false
b. False
(Ice refers to water and to any frozen volatile, including hydrogen, helium, methane, ammonia, and carbon monoxide.)
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Water is to be condensed at 1 atmosphere pressure in a compact heat exchanger having vertical stainless steel plates at 40ºC. Plot the condensation boundary layer thickness flowing down the vertical surface as a function of the distance down the plate, assuming laminar flow. At what point would you assume the condensate flow to become turbulent?
What will be an ideal response?
The direction of polarization of an electromagnetic wave is taken by convention to be
A. the electric field direction.
B. the magnetic field direction.
C. the direction of 
D. perpendicular to the electric field direction.
E. None of these choices are correct.
The force on the walls of a vessel of a contained gas is due to:
A. the repulsive force between gas molecules B. a slight loss in the speed of a gas molecule during a collision with the wall C. a change in momentum of a gas molecule during a collision with the wall D. elastic collisions between gas molecules E. inelastic collisions between gas molecules
An iceboat is traveling in a circle on the ice. Halfway around the circle the sail and the steering mechanism fall off the boat. Which statement is correct?
a. The boat will continue traveling in the circle because there is no friction. b. The boat will continue to travel in the circle because its velocity exerts a force on it. c. The boat will move off on a line tangent to the circle because there is no force on it. d. The boat will move off tangent to the circle because there is a force on it perpendicular to the boat directed to the outside of the circle. e. The boat will move off to the outside perpendicular to the tangent line since a force directed to the outside of the circle always acts on the boat.