What kind of material in the solar nebula could remain solid at temperatures as high as 1,500 K, such as existed in the inner regions of the nebula?
A) rocks
B) metals
C) silicon-based minerals
D) hydrogen compounds
E) molecules such as methane and ammonia
B
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Quasars can emit as much as thousands of times as much energy as normal galaxies
Indicate whether the statement is true or false
The flow rate of a liquid through a 4.0-cm-radius pipe is 0.0080 m3/s. The average fluid speed in the pipe is
a. 0.040 m/s. b. 0.0050 m/s. c. 0.16 m/s. d. 1.6 m/s. e. 16 m/s.
The spreading of white light into its spectrum is called
A) refraction. B) dispersion. C) reflection. D) demodulation. E) rainbowing.
Four identical springs each have the same spring constant k. If these four springs are attached end to end forming a spring four times the length of one of the original springs, what will be the spring constant of the combination?
a. k c. 4k b. k/4 d. 1.41k