The hydrogen Balmer line H? has a wavelength of 486.1 nm in the laboratory. It is observed in a quasar at 2430.5 nm. What is the fractional change in wavelength or redshift z of this quasar?
a. 5
b. 0.5
c. 0.25
d. 4
e. 1944.4
d
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The resolving power of a telescope is
a. a measure of the minimum angular separation that can be seen with the telescope. b. a measure of the maximum angular separation that can be seen with the telescope. c. a measure of the amount of light that the telescope can gather in one second. d. the separation between the objective and the image. e. a measure of how blurry object appear in the telescope.
Unlike the atmospheres of Jupiter and Saturn, Uranus and Neptune have almost no:
A) Hydrogen. B) Helium. C) Methane. D) Ammonia. E) Nitrogen.
An object on the flat bed of a truck that is accelerating along a straight horizontal road. The coefficient of static friction is 0.300 in this case. Of the following choices, which is the lowest value of acceleration that would result in the object sliding on the bed of the truck?
A. 0.280 m/s2 B. 0.310 m/s2 C. 2.93 m/s2 D. 2.99 m/s2 E. 3.02 m/s2
As viewed from any place within the continental United States, noon on apparent solar time is defined as the moment when the Sun is
A) directly overhead. B) ante meridiem. C) at a right ascension of 0 hours. D) directly south.