Most of the new star formation in the Galaxy is found in the:
A) halo.
B) spiral arms.
C) bulge.
D) galactic center.
E) globular clusters.
B
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An organ pipe open at both ends has a radius of 4.0 cm and a length of 6.0 m. What is the frequency (in Hz) of the third harmonic? (Assume the velocity of sound is 344 m/s.)
a. 76 b. 86 c. 54 d. 28 e. 129
From stage 4 to stage 7 of star formation, the object plotted on the H-R diagram moves so that:
A) its luminosity decreases, while its temperature increases. B) its luminosity decreases, while its temperature stays the same. C) its luminosity increases, while its temperature increases. D) its luminosity increases, while its temperature stays the same. E) its luminosity stays the same, and its temperature stays the same.
A diatomic molecule has 18 × 10-5 eV of rotational energy in the l = 2 quantum state. What is its rotational energy in the l = 0 quantum state?
A) 60 µeV B) 15 µeV C) 0 eV D) 90 µeV E) 30 µeV
When light passes through two or more narrow slits, an alternating dark and bright pattern is observed on a screen because of __________
Fill in the blank(s) with correct word