The resolving power of an optical telescope with a diameter of 232 cm is
a. 0.05 arc seconds.
b. 232 arc seconds.
c. 2.32 arc seconds.
d. 5 arc seconds.
e. 11.6 arc seconds.
A
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You live at a latitude of 39° S. What is the angle between the southern horizon and the south celestial pole?
a. 45° b. 23.4° c. 39° d. 51° e. The answer depends on the day of the year.
Matter Waves: The spacing of the atoms of a crystal is 159 pm. A monoenergetic beam of neutrons directed normally at the surface of the crystal undergoes first order diffraction at an angle of 58° from the normal. What is the energy of each of the neutrons? (mneutron = 1.675 × 10-27 kg, 1 eV = 1.6 × 10-19 J, h = 6.626 × 10-34 J ? s)
A. 0.045 eV B. 0.039 eV C. 0.050 eV D. 0.056 eV E. 0.061 eV
Venus' rotation period is longer than its year
Indicate whether the statement is true or false
Archaeopteryx fossils are those of a prehistoric
a. bird. b. crinoid. c. trilobite. d. ground sloth.