At what water depth is an ocean wave affected by the ocean floor?
A) It depends on the wave's angle of approach to the shoreline.
B) The ocean floor has no impact on ocean waves.
C) At the depth equal to one-half the wave's wavelength.
D) At the depth where transverse motion dominates.
Answer: C
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A model for how repulsive forces between two particles can be mediated by a third particle would be
a. A person on a skateboard pushing against a wall. b. two people in two canoes throwing a ball back and forth. c. two people in two canoes each pulling on one end of a rope. d. two people in two skateboards giving each other a shove. e. two people in two skateboards each pulling on one end of a rope.
In the Grand Unified Theory, the superforce was:
A) only dark energy. B) a union of the weak and electromagnetic forces. C) a union of all matter and energy. D) a union of the gravitational, strong and weak nuclear, and electromagnetic forces. E) only in effect at low energies.
A lithium atom, mass 1.17 × 10-26 kg, vibrates with simple harmonic motion in a crystal lattice, where the effective force constant of the forces on the atom is k = 49.0 N/m
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, h = 1.055 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) (a) What is the ground state energy of this system, in eV? (b) What is the wavelength of the photon that could excite this system from the ground state to the first excited state? What will be an ideal response?
When a light wave enters into a medium of different optical density
A) its speed and frequency change. B) its speed and wavelength change. C) its frequency and wavelength change. D) its speed, frequency, and wavelength change.