Posted by **Bobby** on Wednesday, November 14, 2012 at 6:27pm.

An aluminum bar has the desired length when at 10 degrees Celsius. How much stress is required to keep it at this length if the temperature increases to 33 degrees Celsius?

- Physics -
**Bethany**, Wednesday, November 14, 2012 at 6:35pm
The change in L = (Initial L)x(Force)/E/Area.

The change in L also = (Alpha)x(Initial L)x(Change in Temperature)

So, (Alpha)x(Change in Temperature)x(E) = Force/Area

So, (25x10^-6)x(23)x(70x10^9) = 4.0x10^7 N/m^2

## Answer This Question

## Related Questions

- Physics 20 - 1. How much heat energy is required to change 500 grams of water at...
- Physics - Please Help! I am having difficulties grasping these concepts. Explain...
- Calculus - I do not understand what this question is asking and how to get the ...
- calculus - A cold metal bar at -30 degrees Celsius is submerged in a pool ...
- Chemistry - Calculate the joules of energy involved when 11 grams of water at 10...
- Chemistry - How much time is required for a sound to travel 1 mile if the air ...
- Chemistry - the specific heat of aluminum is 0.900 J/g degrees celsius. how ...
- heat - A siler bar 0.125 meter long is subjected to a temperature change from ...
- science - a silver bar 0.125 meter long is subjected to a temperature change ...
- Chemistry - At 28.4 g sample of aluminum is heated to 39.4 degrees Celsius and ...

More Related Questions