The major difference between phosphorescent and fluorescent materials is
A) a time delay between excitation and de-excitation.
B) a difference in brightness.
C) the greenish color of phosphorescence.
D) none of the above
Question 2
During a strenuous period of extravehicular activity, an astronaut generates 2.0 MJ of heat per hour, which must be removed by means of the liquid cooling and ventilating garment (LCVG) worn under the spacesuit.
How much water must be circulated in the LCVG to remove this quantity of heat if it takes it from the astronaut at 37C and dumps it at 0C? A) 1.5 kg/hr
B) 7.8 kg/hr
C) 13 kg/hr
D) 26 kg/hr
E) 480 kg/hr
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