Opposing shearing forces of 3000 N are applied to the 4.00-cm ...

[washai]

Opposing shearing forces of 3000 N are applied to the 4.00-cm  5.00-cm faces of a metal block measuring 3.00 cm  4.00 cm  5.00 cm. By what amount does the block become slanted? The shear modulus for this metal is 8.10  1010 N/m2.
 
  A) 5.56  10-7 m
  B) 9.88  10-7 m
  C) 6.98  10-6 m
  D) 1.54  10-6 m
  E) 3.08  10-6 m

Question 2

A sound of 40 decibels is
 
  A) four times as intense as a sound of 20 decibels.
  B) twice as intense as a sound of 20 decibels.
  C) 1000 times as intense as a sound of 20 decibels.
  D) 100 times as intense as a sound of 20 decibels.
  E) 10 times as intense as a sound of 20 decibels.

[Mholman93]

Answer to Question 1

A

Answer to Question 2

D