In the context of the double-slit experiment, quantum uncertainty refers to
A) the fact that the particles of matter or radiation are instantaneously replaced by a spread-out matter field or EM field when the particles impact the screen.
B) the fact that the electron beam or light beam goes through both slits rather than only one.
C) our inability to precisely predict the point at which a spread-out matter field or EM field will interact with the screen.
D) the fact that the entire matter field or EM field instantaneously collapses to the single interaction point when the field interacts with the screen.
E) the fact that each interaction with the screen occurs over a broad area of the screen.
C
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The curved shape of Earth's shadow during an eclipse was evidence for ________.
A. a spherical Earth B. a flat, circular Earth C. a flat, circular Moon D. a spherical Moon E. None of these choices is correct.
The center of the universe:
A) is the Milky Way. B) is the Sun. C) is Earth. D) is where the Big Bang happened. E) does not exist anywhere in space.
Planet W-70 has a radius of 2.48 × 107 m and an escape velocity of 23,300 m/s. What is the mass of W-70? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 1.01 × 1026 kg B) 2.02 × 1026 kg C) 3.03 × 1026 kg D) 4.04 × 1026 kg E) 5.05 × 1026 kg
An ionized atom having Z protons has had all but one of its electrons removed. If E is the total energy of the ground state electron in atomic hydrogen, then what is the total energy of the remaining electron in the ionized atom?
A) ZE B) E/Z C) E D) Z2E E) E/Z2