Please help this is the 3rd time i post this question on chegg and it keeps gett
ID: 1588768 • Letter: P
Question
Please help this is the 3rd time i post this question on chegg and it keeps getting it wrong the answer IS NOT 2.303 please help :)
While taking photographs in Death Valley on a day when the temperature is 59.0°C, Bill Hiker finds that a certain voltage applied to a platinum wire produces a current of 1.000 A. Bill then travels to Antarctica and applies the same voltage to the same wire. What current does he register there if the temperature is -88.0°C? Assume that no change occurs in the wire's shape and size.
Explanation / Answer
Rt=R0(1+(T-T0))
of platinum wire=0.0045 link to get value of (http://hyperphysics.phy-astr.gsu.edu/hbase/Tables/rstiv.html#c1)
R0=V/1A (consider the voltage to be 1)
Rt=V/Current
V/Current=V/1A (1+0.0045(-88-59))
Current=1/(1-0.6615)=2.9542 Ampere
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