PURPOSE: To illustrate the function of silvering a dewar.
DESCRIPTION: Hot water is put into two dewars, one unsilvered and one silvered. The temperature of both in centigrade degrees is monitored as time passes:
t (min) silvered unsilvered
0 -- 84.5 -- 84.5
15 -- 83.5 -- 80.0
40 -- 83.0 -- 74.5
70 -- 82.0 -- 68.5
SUGGESTIONS:
REFERENCES: (PIRA 4B50.10)
EQUIPMENT: Two dewars in stands with cork stoppers, one silvered and one unsilvered, hot plate and water, digital thermometers
SETUP TIME: 10 min.
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