List of questions i just cannot figure out! Someone please help

[rx-[7]]

Ok ignore the first 2 questions as ive already done em.

its just the rest i cannot figure out. If anyone could just shed a little light on this problem it i can finally sleep.

Thanks in advanced

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regards

[rx-[7]]

oh btw the coefficient of thermal expansion tables is 3.2X10 to the power of -6 and steel 11x10 to the power of -6

[krab]

oh btw we don't do your homework for you; we only help YOU to do it.