## anonymous one year ago A copper rod at 25 degrees C is 1.5 m long. How long would it take a sound to move through the rod from one end to another? A. 2.9 * 10^-4 s B. 4.2 * 10^-4 s C. 9.8 * 10^-4 s D. 4.5 * 10^-3 s ***i will draw a table! :)

1. anonymous

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2. anonymous

sorry it is a bit messy! all degrees are in degrees Celsius!!

3. Michele_Laino

here we have to compute this: $t = \frac{{1.5}}{{3560}} = ...\sec$

4. anonymous

we get 4.213483146E-4 so our solution is choice B?

5. anonymous

not sure if i calculated that corrrectly?

6. Michele_Laino

that's right!

7. anonymous

yay!! :D thanks!!

8. Michele_Laino

:)