An electron inside a hydrogen atom is confined to within a space of about 0.12 nm
What is the uncertainty in this electron's speed? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A) 3.1 × 105 m/s B) 3.1 km/s C) 4.8 × 106 m/s D) 4.8 m/s E) 9.6 × 105 m/s
E
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What does the exclusion principle say?
A) Two fermions cannot occupy the same quantum state at the same time. B) No two particles of any type can ever occupy the same quantum state at the same time. C) If a particle has a precisely defined position it is excluded from having a precisely defined momentum. D) The laws of quantum mechanics are excluded from our common sense.
The Milky Way Galaxy
a. contains about 100 billion stars. b. is about 200 light-years in diameter. c. is the largest known object in the universe. d. all of the above e. a and c
Microscopic slush in ice water tends to make water density
A) lower. B) higher. C) sustain at one value.
Are the Hawaiian Islands made up primarily of igneous, sedimentary, or metamorphic rock?
What will be an ideal response?