If two light waves are coherent, which of the following is NOT necessary?
A) They must have the same frequency.
B) They must have the same wavelength.
C) They must have the same amplitude.
D) They must have the same velocity.
E) They must have a constant phase difference at every point in space.
C
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Refrigerator magnets are typically
A) short range. B) long range. C) none of these
Vector is 75.0 cm long and points at 30° above the positive x axis. Vector is 25.0 cm long and points along the negative x axis. Vector is 40.0 cm long and points at 45° below the negative x axis
(a) Determine the x and y components of Vector . (b) Determine the x and y components of Vector . (c) Determine the x and y components of Vector . (d) Determine the sum of these three vectors in terms of components. (e) Determine the sum of these three vectors in terms of magnitude and direction.
The conversion of the initial potential energy of a person on a sled on a smooth icy slope into kinetic energy at the bottom is an example of the principle of conservation of ________.
What will be an ideal response?
The main energy transformation that occurs while an electric blender is mixing your orange juice is
A) electric E ? kinetic E. B) chemical E ? thermal E. C) electric E ? chemical E. D) kinetic E ? electric E. E) thermal E ? kinetic E.