A block of granite is actually mostly empty space because the ...

[savannahhooper]

A block of granite is actually mostly empty space because the atoms making up the granite are
 
  A) in perpetual motion.
  B) made of cotton candy.
  C) not as close together as they could be.
  D) held together by electrical forces.
  E) themselves mostly empty space.

Question 2

Waves travel along a 100-m length of string which has a mass of 55 g and is held taut with a tension of 75 N. What is the speed of the waves?
 
  A) 3700 m/s
  B) 370 m/s
  C) 37 m/s
  D) 0.37 m/s
  E) 3.7 m/s

[annierak]

Answer to Question 1

E

Answer to Question 2

B