A very light 1.00-m wire consists of two segments of equal ...

[Arii_bell]

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

[thall411]

Answer to Question 1

C

Answer to Question 2

Answer: B

[Arii_bell]

TYSM

[bitingbit]

Excellent