Part A Steel train rails are laid in 11.4m -long segments placed end to end. The

Q: Part A Steel train rails are laid in 11.4m -long segments placed end to end. The

Part A Taking the coefficient of expansion for steel as .. ? = 1.20*10^-5

ID: 1307498 • Letter: P

Question

Part A Steel train rails are laid in 11.4m -long segments placed end to end. The rails are laid on a winter day when their temperature is -2.00 ?C. How much space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 30.0?C?

d = mm

Part B If the rails are mistakenly laid in contact with each other, what is the stress in them on a summer day when their temperature is 30.0?C?

? = Pa

PS: The answer is not 4.74 mm and 11980 Pa. I asked this before but appearently it is not the right answer.

Explanation / Answer

Part A

Taking the coefficient of expansion for steel as .. ? = 1.20*10^-5

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Part A Submit MyAnswers GiveUp Correct Part B For the best system, calculate the

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Part A Steel train rails are laid in 11.4m -long segments placed end to end. The

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