
#1
Dec1010, 05:12 PM

P: 10

1. The problem statement, all variables and given/known data
A steel rule is calibrated for meauring lengths at 20.00 C. The rule is used to mesure the lenght of a Vycor glass brick; when both are at 20.00 C the length is 25.00cm. What is the length of both the rule and the brick when at 80.00 C 2. Relevant equations coef of glass a=.75 *10^6K coef of steel a=12*10^6 K 3. The attempt at a solution.75*10^6K *60.0 (the diff of Temp)*25.0 (L inital) after this I am confused 



#2
Dec1010, 05:43 PM

Mentor
P: 39,716

http://en.wikipedia.org/wiki/Thermal_expansion And to your question, how do you apply a linear coefficient of expansion to calculate the change in length? 



#3
Dec1010, 06:08 PM

P: 10

I was using the books list. So should I still use the Coeffient for glass even though the problem says to assume that the glass doesn't expand in this problem.What is the proper way to set up my formula and coeff ? Can you show me another way?




#4
Dec1010, 06:20 PM

Mentor
P: 39,716

Thermal expansion bt. steel rule and vycor glass brickAnd as for how to use the coefficients to calculate the change in length, surely your book has examples on how to do it...? 



#5
Dec1010, 06:22 PM

P: 10

a is linear coeffient and B is volume expansion coeffiecient.




#6
Dec1010, 06:25 PM

P: 10

No, there aren't many examples in the book on this . The question i asked is asked completely by my second response. Sorry about that.



Register to reply 
Related Discussions  
Thermal expansion of a glass bottle  Introductory Physics Homework  1  
Thermal Expansion of Aluminium Sleeve over Steel shaft  Introductory Physics Homework  1  
Thermal conductivity of glass  Introductory Physics Homework  0  
Steel Glass?  Materials & Chemical Engineering  2 