The major players in the discovery of the cosmic microwave background were at
A) Kitt Peak and the University of Arizona.
B) Bell Labs and Princeton.
C) Cal Tech and Mt. Palomar.
D) Keck telescopes and the University of Hawaii.
E) Jet Propulsion Lab and MIT.
B
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Light shines through atomic hydrogen gas. It is seen that the gas absorbs light readily at a wavelength of 91.63 nm
What is the value of n of the level to which the hydrogen is being excited by the absorption of light of this wavelength? Assume that the most of the atoms in the gas are in the lowest level. (h = 6.626 × 10-34 J ? s, c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, the Rydberg constant is R = 1.097 × 107 m-1) A) 14 B) 16 C) 11 D) 21
A hydrogen atom is in the 6h state. Which one of the following is not a magnetic quantum number?
A) 0 B) 1 C) 2 D) 4 E) 6
If the net force on an object is zero, does the net torque on the object also have to be zero?
What will be an ideal response?
The quasars with the largest presently known redshifts are close to:
A) .96. B) 3. C) 6. D) 10. E) 65.