Author Question: If one metal has double the number of conduction electrons per unit volume of a second metal, then ... (Read 80 times)

evelyn o bentley · **on:** Jul 29, 2018

If one metal has double the number of conduction electrons per unit volume of a second metal, then its Fermi level (energy) is how many times that of the second metal?

A) 1.41 B) 1.59 C) 2.00 D) 2.83 E) 3.22

Question 2

A bimetallic strip is made by bonding together a 1.0-mm thick and 15.0-cm long steel strip to a similar strip made of aluminum.

The strip is straight when the temperature is 20.0C. What will the radius of curvature of the strip be when the temperature is 40.0C? The coefficient of thermal expansion of steel is 10.5 10-6K-1 and that of aluminum is 23.0 10-6K-1.
A)

4.0 m

B)

3.6 m

C)

4.8 m

D)

5.2 m

E)

4.4 m