The greatest redshifts yet observed for quasars is about
A) 0.1. B) 0.7. C) 1.4. D) 7.0. E) 14.0.
D
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Relative Velocity: A swimmer heading directly across a river that is 200 m wide reaches the opposite bank in 6 min 40 s. During this swim, she is swept downstream 480 m. What is the speed of the current?
A. 0.50 m/s B. 0.80 m/s C. 1.2 m/s D. 1.4 m/s E. 1.8 m/s
The quantum mechanical model of the hydrogen atom requires that if the orbital quantum number of the hydrogen atom is 3, there will be how many permitted orbital magnetic quantum numbers?
a. three c. four b. nine d. seven
The position of a mass that is oscillating on a spring is given by x = (12.3 cm) cos[(1.26 s2)t]. What is the acceleration of the mass when t = 0.825 s?
A) 9.89 cm/s2 B) -9.89 cm/s2 C) 10.6 cm/s2 D) -10.6 cm/s2 E) 0 cm/s2
The most common main-sequence stars have spectral type
A) G. B) A. C) O. D) M.