What is true of galaxies at the larger redshifts compared to ones nearby?
A) They are mostly giants.
B) They are redder.
C) They appear smaller and more irregular.
D) They are almost all ellipticals.
E) They appear larger and more regular.
C
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In the two-slit experiment, monochromatic light of wavelength 600 nm passes through a pair of slits separated by 2.20 × 10-5 m. What is the angle corresponding to the first bright fringe?
A) 1.56° B) 2.22° C) 3.12° D) 4.70° E) 6.24°
A radioactive isotope of atomic number Z emits a beta-minus particle, and then the daughter nucleus emits a gamma ray. What is the atomic number of the resulting nucleus after both processes?
A) Z - 3 B) Z + 1 C) Z - 2 D) Z - 1
Vector 1 is 7 units long and is at 70°. Vector 2 is 5 units long and is at 155°. Vector 3 is 3 units long and is at 225°. Which vector has equal-magnitude components?
a. Vector 1 b. Vector 2 c. Vector 3 d. None of the vectors has equal-magnitude components.
Rank these planets in order of the strength of the greenhouse effect on the planet, from the weakest to the strongest greenhouse effect.
A) Mars, Mercury, Earth, Venus B) Mercury, Venus, Earth, Mars C) Mercury, Earth, Mars, Venus D) Mercury, Mars, Earth, Venus E) Mars, Earth, Venus, Mercury