How do elliptical galaxies typically compare to spiral galaxies?
A) Elliptical galaxies are redder and rounder.
B) Elliptical galaxies are redder and flattened.
C) Elliptical galaxies are bluer and rounder.
D) Elliptical galaxies are bluer and flattened.
E) Elliptical galaxies are always much smaller.
A) Elliptical galaxies are redder and rounder.
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Our galaxy is suspected to be surrounded by a galactic halo or corona because the disk of the galaxy
a. rotates faster than expected in its outer region. b. rotates more slowly than expected in its outer region. c. is only visible during a total eclipse of our Sun. d. is surrounded above, below, and well beyond by the brightly glowing corona.
Which would have the lower average molecular kinetic energy?
(i) a sample of hydrogen gas, H2, at 0°C (ii) a sample of oxygen gas, O2, at 100° C
1.(i) 2.(ii) 3.They have the same average molecular kinetic energy. 4.It is impossible to tell.Jupiter's "striped" appearance is a result of
A) alternating bands of rising and falling air at different latitudes. B) alternating bands of liquid and gaseous material at different latitudes. C) changes in the atmospheric composition with latitude. D) changes in the strength of Jupiter's magnetic field with latitude.
________ has the largest gravitational pull on Earth
A) Mars B) The Moon C) Venus D) Jupiter E) The Sun