According to its rotation curve, the majority of our Galaxy's mass is ________
Fill in the blank(s) with correct word
dark matter
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Exclusion Principle: How many 2d electron states can an atom have?
A. 0 B. 4 C. 6 D. 8 E. 10
Approximately how soon might we expect an immediate response from a civilization that received the signal we sent to the globular cluster M13 (21,000 light-years away) in 1974?
A) 84,000 years B) 21,000 years C) 10,500 years D) 42,000 years
Identify the falsi?able statement below
A) President Kennedy's murder was orchestrated by an undetectable shadow government of the United States. B) The Sun is at the center of the solar system. C) The laws of nature are magni?cent and beautiful. D) The universe was created by God.
A deuteron, with the same charge but twice the mass of a proton, moves with a speed of 6.00 × 10^5 m/s perpendicular to a uniform magnetic field of 0.0525 T. Which of the paths described below would it follow? (qp = 1.60 × 10^?19 C and md = 3.34 × 10^?27 kg)
a. a straight-line path b. a circular path of 61.1 cm radius c. a circular path of 23.9 cm radius d. a circular path of 2.14 cm radius e. a circular path of 1.70 cm radius