Werner Heisenberg A) developed a wave equation for matter ...

[washai]

Werner Heisenberg
 
  A) developed a wave equation for matter waves (1926).
  B) was the first to produce X-ray-like diffraction patterns of electrons passing through thin metal foil (1927).
  C) set the limits on the probability of measurement accuracy (1927).
  D) suggested the existence of matter waves (1924).
  E) predicted the positron from relativistic quantum mechanics (1928).

Question 2

A pencil balanced on its tip such that it does not move
 
  A) is in unstable equilibrium.
  B) is in stable equilibrium.
  C) has a net torque acting on it.
  D) has a net vertical force.
  E) has a zero moment of inertia.

[fraziera112]

Answer to Question 1

C

Answer to Question 2

A

[washai]

Excellent

[kusterl]

Gracias!