By what length will a slab of concrete that is originally 18 m ...

[@Brianna17]

By what length will a slab of concrete that is originally 18 m long contract when the temperature drops from 24C to -16C? The coefficient of linear thermal expansion for this concrete is 1.0  10-5 K-1.
 
  A) 0.50 cm
  B) 0.72 cm
  C) 1.2 cm
  D) 1.5 cm

Question 2

In a region where the electric field is uniform and points in the +x direction, the electric potential is -2000 V at x = 8 m and is +400 V at x = 2 m. What is the magnitude of the electric field?
 
  A) 200 V/m
  B) 300 V/m
  C) 400 V/m
  D) 500 V/m
  E) 600 V/m

[brittrenee]

Answer to Question 1

B

Answer to Question 2

C

[@Brianna17]

Excellent

[Animal_Goddess]

Gracias!