An aluminum wire 2.0 m long and 2.0 mm in diameter supports a ...

[cool]

An aluminum wire 2.0 m long and 2.0 mm in diameter supports a 10.0-kg fixture. What is the stress in the wire? Young's modulus for aluminum is 7.0  1010 N/m2.
 
  A) 9.3  107 N/m2 B) 3.1  107 N/m2 C) 6.2  107 N/m2 D) 1.2  108 N/m2

Question 2

According to the theory of cosmic inflation, the universe
 
  A) began as the result of the big crunch collapse of some pre-existing universe.
  B) began from a powerful electromagnetic effect in vacuum.
  C) had no beginning but instead has always existed.
  D) began as a tiny fragment of space and time.
  E) began when two very massive pre-existing particles collided and annihilated with each other.

[katkat_flores]

Answer to Question 1

B

Answer to Question 2

D

[cool]

Thanks

[katkat_flores]

Welcome