Which of the following statements is true regarding shock waves?
A) They are predominantly transverse in nature.
B) They can be produced by the birth of very hot stars.
C) They are also called shear waves.
D) They cannot be produced by supernova explosions.
B
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To create the above spectra, which of the following is NOT true?
a. A dense gas is excited and the light produced is over all wavelengths.
b. A low-density gas is excited and the light produced is over discrete wavelengths.
c. Light from a low-density gas passes through a warm, dense gas and the light that is produced is at all wavelengths except for a few discrete wavelengths.
d. All of the other choices are not true.
Vision Problems: Nearsightedness is usually corrected with
A. converging lenses. B. diverging lenses. C. convex mirrors. D. cylindrical lenses. E. concave mirrors.
A 2.00 m by 3.00 m plate of aluminum has a mass of 324 kg. What is the thickness of the plate? (The density of aluminum is 2.70 × 103 kg/m3.)
What will be an ideal response?
All the planets in the solar system have at least one moon
Indicate whether the statement is true or false