
#1
Sep1306, 05:53 PM

P: 267

Pacemakers which are designed for longterm use commonly employ a lithiumiodine battery capable of supplying 0.42 A x h of charge. (a) How many coloumbs of charge can such a battery supply? (b) If the average current produced by the pacemaker is 5.6 mcA, what is the expected lifetime of the device?
I am pretty sure I have to use the equation I = Q/t, so Q = It? How do I get t, since it is not mentioned at all? Does this have anything to do with the "x h" mentioned in the problem? 



#2
Sep1306, 06:12 PM

P: 1,445

what unit make up an Ampere??
since I = Q/t and time is in what units? can you figure out how to d oyour problem now?? 



#3
Sep1306, 06:17 PM

P: 267

A = C/s, so C = As = (0.42)(3600) = 1512C. As for part (b), what is 5.6 mcA? I see the A, but was does mc mean?




#4
Sep1306, 06:31 PM

P: 1,445

Pacemaker problemmicro = 10^6 



#5
Sep1306, 06:34 PM

P: 267

Okay, I correctly solved this problem, thank you!



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