# Homework Help: Resistance from heat system, (Thermo)

1. Feb 4, 2010

### hitman0097

1. The problem statement, all variables and given/known data
A thermistor is a solid-state device widely used in a variety of engineering applications. Its primary characteristic is that its electric resistance varies greatly with temperature. Its temperature dependence is given approximately by R = R0e^(B/T), where R is in ohms (Ω), T is in kelvins, and R0 and B are constants that can be determined by measuring R at calibration points such as the ice point and the steam point.

a.) If R = 7360 Ω at the ice point and 153 Ω at the steam point, find R0 and B.
R0 = ohms
B = K

(b) What is the resistance of the thermistor at T= 98.6°F?

c) What is the rate of change of the resistance with temperature (dR/dT) at the ice point and the steam point?

2. Relevant equations
R = R0e^(B/T)

3. The attempt at a solution
for part A I tried to solve it algebraically by Making each equation equal to B and solve for R0.
But My answers were all wrong (-2.61, 11.28)