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Author Question: A very light 1.00-m wire consists of two segments of equal length, one of steel (Young's modulus is ... (Read 23 times)

Arii_bell

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on: Jul 29, 2018
A very light 1.00-m wire consists of two segments of equal length, one of steel (Young's modulus is 2.00  1011 N/m2 )
 
  and one of brass (Young's modulus is 9.0  1010 N/m2 ). The steel segment is 1.50 mm in diameter, and the brass segment has twice this diameter. When a weight w is hung from the ceiling by this wire, the steel segment stretches by 1.10 mm. Find the weight w.
  A) 190 N
  B) 390 N
  C) 780 N
  D) 1000 N
  E) 3100 N

Question 2

A rubber rod rubbed with fur becomes
 
  A) positively charged.
  B) negatively charged.
  C) both
  D) neither


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thall411

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

C

Answer to Question 2

Answer: B


Arii_bell

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

xiazhe

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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