A closed system can be a bad thing — for an astronaut sealed inside a space...
A closed system can be a bad thing — for an astronaut
sealed inside a space suit, getting rid of body heat can be
difficult.
Suppose a 60-kg astronaut is performing vigorous physical
activity,
expending 200 W of power. If none of the heat can escape from
her
space suit, how long will it take before her body temperature
rises
by 6◦C (11◦F), an amount sufficient to kill her? Assume that
the
amount of heat required to raise her body temperature by 1◦C
is
the same as it would be for an equal mass of water. Express
your
answer in units of minutes.
Homework Answers
Q = mC
T
=energy produced @200W = 200x time
Time = 60x 4200 x 6/200 = 7560 sec = 126 mins Answer
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A closed system can be a bad thing — for an astronaut
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