One "food calorie" equals 1000 calories
a. True
b. False
Indicate whether the statement is true or false
True
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A galaxy that has gone through many collisions and mergers must be a(n) _______________ galaxy
Fill in the blank(s) with correct word
The redshift of the galaxies is correctly interpreted as:
A) a Doppler shift due to the random motions of galaxies in space. B) an aging of light as gravity weakens with time. C) space itself is expanding with time, so the photons are stretched while they travel through space. D) placing our Galaxy near the center of the Local Group. E) the differences in temperatures and star formation in old and young galaxies.
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?
At a particular instant, a proton moves Eastward in a uniform magnetic field that is directed straight downward. The magnetic force that acts on it is
A) to the South. B) zero. C) directed upward. D) Northward. E) Westward.