Because of Heisenberg's Uncertainty Principle, the velocity of a particle is known least precisely when the length of the wave packet representing the particle is
a. < 10?15 m.
b. < 10?10 m.
c. of the order of 1.00 m.
d. >10 m.
e. the length of a plane wave (infinite)
a
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Large, smooth, dark plains on the moon are called ____
a. ejecta blanket b. central peak c. maria d. multiringed basin e. Sinuous rilles
Which of the following is an example of antimatter?
A) neutron B) positron C) neutrino D) muon E) electron
A farsighted person cannot see clearly objects that are closer to her eyes than 60.0 cm
Which one of the following combinations represents the correct focal length and the refractive power of the contact lenses that will enable her to comfortably see the objects at a distance of 25.0 cm from her eyes? A) -42.9 cm, +2.33 diopters B) -42.9 cm, -2.33 diopters C) +42.9 cm, +2.33 diopters D) +42.9 cm, -2.33 diopters E) +60 cm, +42.9 diopters
As more resistors are added in series to a constant voltage source, the power supplied by the source
A) increases. B) decreases. C) does not change. D) increases for a time and then starts to decrease.