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 one year ago
In a thermometer calibration test 0.31 OHM are registered when the temperature is 422 (K),
according to R=R0*e^(A*((1/T)(1/T0))) where A is a constant, R0 is in OHMs, and T0 in (K).
If a R0=2.2 OHM for T0=310 (K), calculate R for 390 (°F).
 one year ago
In a thermometer calibration test 0.31 OHM are registered when the temperature is 422 (K), according to R=R0*e^(A*((1/T)(1/T0))) where A is a constant, R0 is in OHMs, and T0 in (K). If a R0=2.2 OHM for T0=310 (K), calculate R for 390 (°F).

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JeanetteBaker
 one year ago
Best ResponseYou've already chosen the best response.4First, you need to find the value of A. Use the initial conditions along with the measured readings to find A. R=Ro*e^A*(1/T1/To) so A = [ln(R/Ro)]/(1/T1/To) = [ln(.31/2.2)]/(1/4221/310) to find R for 390 F, convert F to Kelvin... 390 F = 472 K then used this value of T along with the value of A you calculated. so R=Ro*e^A*(1/T1/To) =2.2*e^2289*(1/4721/310)

stdygp
 one year ago
Best ResponseYou've already chosen the best response.0thank you very much, I thought the first condition was R=R0*e^A*(1/T1/422), the second R=0.22*e^A*(1/T1/310) and the last R=Ro*e^A*(1/T1/472), because only T0 is the registered temperature, I'll ask about both ideas, maybe the problem was not worded nicely
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