Neptune was discovered by irregularities in the orbit of
A) Jupiter.
B) Saturn.
C) Uranus.
D) Pluto.
E) Earth.
Answer: C
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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.
Which of the following colors has the shortest wavelength?
A. Yellow B. Red C. Orange D. Green
What are the 3 parts of this type of galaxy, and which 2 might you see through a telescope?
A: Disk, bulge, and halo; would see bulge and disk, and wouldn't see halo. B: Disk, bulge, and halo; would see bulge and halo, and wouldn't see disk. C: Stars, Gas, and dust; would see gas and dust, and wouldn't see stars. D: Spirals, ellipticals, and irregulars; would see ellipticals and spirals, but wouldn't see irregulars. E: Spirals, ellipticals, and irregulars; would see irregulars and spirals, but wouldn't see ellipticals.
Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of and Betty has a speed of
Their dog, Spot, starts by Arthur's side at the same time and runs back and forth between them at 5.0 m/s. By the time Arthur and Betty meet, what distance has Spot run? What will be an ideal response?