October 16th, 2017, 01:19 AM  #1 
Newbie Joined: Aug 2017 From: Davao Posts: 9 Thanks: 0  Thermal Expansion
1. A thin brass sheet at 15 ˙C has the 20.023 Sq.cm. surface area while thin steel at 20˙C of 20 sq.cm. At what temperature the two sheets have the same area.

October 16th, 2017, 02:48 AM  #2 
Senior Member Joined: Apr 2014 From: Glasgow Posts: 2,102 Thanks: 704 Math Focus: Physics, mathematical modelling, numerical and computational solutions 
The "area expansion" part of the Wikipedia page should be what you need; you just need to look up the thermal expansion coefficient for brass and steel to use the equations there. https://en.wikipedia.org/wiki/Thermal_expansion 

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