Which of the following materials has the largest conductivity (at 20C)?
A) copper
B) platinum
C) silver
D) iron
E) glass
Question 2
Wall posters are usually sold curled up in cylindrical cardboard tubes. If the length of the tube is 84.5 cm, and the diameter of the tube is 2.40 cm, what is the area of the poster, in cm2? (Assume the poster doesn't overlap itself.)
A) 1529 cm2
B) 203 cm2
C) 637 cm2
D) 382 cm2
E) 605 cm2
