Suppose the date is March 21 and the Sun crosses your meridian at an altitude of 23-1/2° in the north. Where are you?
A) the equator
B) the Tropic of Cancer (latitude 23-1/2°N)
C) the Tropic of Capricorn (latitude 23-1/2°S)
D) the Arctic Circle (latitude 66-1/2°N)
E) the Antarctic Circle (latitude 66-1/2°S)
E) the Antarctic Circle (latitude 66-1/2°S)
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What is the Q-value of the following reaction?
14N + 4He = 1p + 17O (14.003074 ) (4.002603 ) (1.007825 ) (16.999131 ) A) 11.91 MeV B) 1.191 MeV C) -1.191 MeV D) 1.279 × 10-3 MeV E) -1.279 × 10-3 MeV
Which telescope imaged the center of the Milky Way Galaxy at a wavelength of 8 microns to reveal the distribution of the dusty interstellar medium?
a. Spitzer Space Telescope b. infrared telescope c. European Southern Observatory d. X-ray telescope e. radio telescope
Kirchhoff's Rules: Determine the current in the 12-? resistor for the circuit shown in the figure assuming that the batteries are ideal.
A. 0.25 A B. 0.50 A C. 0.75 A D. 1.0 A
Which of the following best describes what we mean by gravitational lensing?
A) A massive object bends light beams that are passing nearby. B) A massive object scatters away the light of more distant objects. C) Gravity causes matter that would otherwise be dark to become visible. D) Telescope lenses are distorted by gravity.