A 2.0 mm diameter wire of length 20 m has a resistance of 0.25 . ...

[swpotter12]

A 2.0 mm diameter wire of length 20 m has a resistance of 0.25 . What is the resistivity of the wire?
 
  A) 0.25   m
  B) 5.0  10-7   m
  C) 3.9  10-8   m
  D) 4.0  10-7   m
  E) 16  10-8   m

Question 2

In Figure 7.7, a 5.00-kg block is moving at 5.00 m/s along a horizontal frictionless surface toward an ideal spring that is attached to a wall. After the block collides with the spring, the spring is compressed a maximum distance of 0.68 m.
 
  What is the speed of the block when the spring is compressed to only one-half of the maximum distance?

[randomguy133]

Answer to Question 1

C

Answer to Question 2

4.3 m/s

[swpotter12]

TY

[randomguy133]

You're welcome