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Author Question: A 7.0-kg pipe is hung from a steel wire that is 2.5 m long and has a diameter of 0.75 mm. Young's ... (Read 85 times)

azncindy619

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on: Jul 29, 2018
A 7.0-kg pipe is hung from a steel wire that is 2.5 m long and has a diameter of 0.75 mm. Young's modulus for steel is 2.0  1011 N/m2. (a) By what distance does the wire stretch? (b) If the wire diameter were doubled, what would be the stretch?
 
  What will be an ideal response?

Question 2

What is the net power that a person with surface area of 1.20 m2 radiates if his emissivity is 0.895, his skin temperature is 27C, and he is in a room that is at a temperature of 17C? ( = 5.67  10-8 W/m2  K4 )
 
  A) 65.7 W B) 60.3 W C) 64.8 W D) 68.4 W E) 62.6 W
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amynguyen1221

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Reply #1 on: Jul 29, 2018
Answer to Question 1

(a) 1.9 mm (b) 0.49 mm

Answer to Question 2

E


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azncindy619

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Reply #2 on: Jul 29, 2018
Thank you!


amynguyen1221

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Reply #3 on: Jul 29, 2018
Always glad to help...


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