The damage caused by electric shock depends on the current flowing through the body; 1 ma can be felt and 5 ma is painful. above 15 ma, a person loses muscle control, and 70 ma can be fatal. a person with dry skin has a resistance from one arm to the other of about 60000 ω. when skin is wet, the resistance drops to about 4900 ω. what is the minimum voltage placed across the arms that would produce a current that could be felt by a person with dry skin? answer in units of v.
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Physics, 21.06.2019 16:20
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Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.
Answers: 3
The damage caused by electric shock depends on the current flowing through the body; 1 ma can be fe...
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