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Author Question: A steel cable spanning a river is 200.000 m long when the temperature is 20.C. What will be its ... (Read 28 times)

leo leo

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on: Jul 27, 2018
A steel cable spanning a river is 200.000 m long when the temperature is 20.C. What will be its length when the temperature drops to 0C? (The coefficient of thermal expansion of steel is 12.  10-6K-1.)
 
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Question 2

How far apart should two protons be if the electrical force of repulsion is equal to the weight (attraction to the Earth) of one of the protons?
 
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momtoalll

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Reply #1 on: Jul 27, 2018
Answer to Question 1

199.952 m

Answer to Question 2

12. cm


leo leo

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Reply 2 on: Jul 27, 2018
Excellent

marict

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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