Author Question: By what length will a slab of concrete that is originally 18 m long contract when the temperature ... (Read 40 times)

@Brianna17 · **on:** Jul 29, 2018

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