The main reason that massive nuclei don’t simply shed protons to relieve the instability caused by too much electrostatic repulsion is that
A. Energy would not be conserved for typical values of A.
B. This would lead to openings in proton energy levels.
C. Protons aren’t repelled as strongly as alpha particles.
D. Isolated protons can’t exist outside an atom.
A. Energy would not be conserved for typical values of A.
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Film behind a double slit is exposed to light in the following way: First one slit is opened and light is allowed to go through that slit for time ?t. Then it is closed and the other slit is opened and light is allowed to go through that slit for the same time ?t. When the film is developed the pattern will be
a. one single slit pattern. b. two superimposed single slit patterns, their centers displaced from each other by the distance between the two slits. c. one double slit pattern. d. two double slit patterns, their centers displaced from each other by the distance between the two slits. e. random darkening of the film. (no pattern at all)
A supercluster is a cluster of supergiants
Indicate whether the statement is true or false
If a sheet containing two very thin slits is heated (without damaging it), what happens to the angular location of the first-order interference minimum?
A) It moves toward the centerline. B) It moves away from the centerline. C) It doesn't change.
A body of mass 5.0 kg is suspended by a spring which stretches 10 cm when the mass is attached. It is then displaced downward an additional 5.0 cm and released. Its position as a function of time is approximately
a. y = ?0.10 sin 9.9t. b. y = 0.10 cos 9.9t. c. y = ?0.10 cos (9.9t + 0.1). d. y = 0.10 sin (9.9t + 5). e. y = ?0.05 cos 9.9t.