An alternative statement of the uncertainly principle tells us ...

[ericka1]

An alternative statement of the uncertainly principle tells us that we cannot know precisely both
 
  A) a particle's mass and energy.
  B) whether a particle is a wave or whether it is truly a particle.
  C) a particle's energy and the time during which it has this energy.
  D) a particle's momentum and its energy.

Question 2

In our solar system, terrestrial planets are
 
  A) small, made mostly of rock and iron with high densities, and found close to the Sun
  B) large, made mostly of gases and liquids with low densities, and found far from the Sun
  C) large, made of pure gases with low densities, and found far from the Sun
  D) small, made of pure rock with high densities, and found close to the Sun

[chreslie]

Answer to Question 1

C

Answer to Question 2

A

[ericka1]

TY

[chreslie]

You're welcome