- #1

amal

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## Homework Statement

A simple pendulum whose string is made of some unknown material loses 5 seconds per day at 15 deg and gains 10 seconds at 30 deg. What is the alpha i.e. coefficient of linear expansion of this material?

## Homework Equations

**3. The Attempt at a Solution [/b**

I assumed the length where the pendulum has correct period to be L. Then,

L

Please guide me.

I assumed the length where the pendulum has correct period to be L. Then,

L

_{15}(Length at 15 deg)= L-(L*alpha*delta T) where delta T is the fall in temperature but since I do not know both L and delta T, I got stuck. Something similar happens for T =30 deg.Please guide me.