- #1

Kaleb

- 49

- 0

**[SOLVED] 10m Steel Wire Length/ +20 Degrees C**

## Homework Statement

10.00-m long steel wire supports a pendulum bob at its end. How many millimeters longer is the wire when the temperature increase by 20.0 C

## Homework Equations

(Delta)L = La(Delta)T

or

Change in Length = Length * linear expansion * change in temperature

Linear Expansion for Steel

a = 11x10^-6/C

## The Attempt at a Solution

The problem asks for: How many millimeters longer is the steel wire when the temp increases by 20 Celcius.

Variables:

L = 10M

a = 11x10^-6/C

(delta)T = (x+20)

x = original temp

equation: (delta)L = 10m * (11*10^-6/(x+20)) * (x+20)

Attempt at Solving:

110m * 10^-5 (the x+20 cancel out?)

And then I get confused as what to do. Any help is appreciated, tips are always welcome.