Relativity equations for time, length and momentum hold true for
A) relativistic speeds.
B) everyday low speeds.
C) both of these
D) neither of these
Answer: C
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A string on a violin is stretched between two points 20.00 cm apart with a tension of 120.0 N. The mass/length of the string is 0.002000 kg/m. The frequency of the mode next higher than the fundamental mode is
A. 1,400 Hz. B. 1,322 Hz. C. 1,225 Hz. D. 1,558 Hz. E. 2,120 Hz.
A binary star system in the constellation Orion has an angular separation between the two stars of 1.2 × 10^-5 radians. If l = 5 × 10^-7 m, what is the smallest aperture (diameter) telescope that may be used to resolve the two stars?
a. 10 cm b. 5 cm c. 50 cm d. 1 m e. 4 cm
Which one of the following is FALSE?
a) Irregular galaxies, although small, often have lots of star formation taking place in them. b) Barred spiral galaxies have similar properties to normal spirals, except for the "bar" feature. c) Galaxy collisions destroy most of the stars in the galaxies involved. d) Most galaxies appear to be receding from the Milky Way Galaxy. e) Most elliptical galaxies contain only old stars.
The seriousness of an asteroid collision is gauged by the ______________ scale
Fill in the blank(s) with correct word