According to the Hubble law, where H = 17 km/s/106 lightyears, what is the velocity of recession of a quasar at a distance of 2 billion lightyears from Earth?

a. 0.75 c
b. 0.33 c
c. 0.55 c
d. 0.11 c
e. 0.93 c


d

Physics & Space Science

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Astronomers try to reconstruct our Galaxy's past from _____

A) its spherical component B) its disk component C) its spiral arms D) the stars of neighboring galaxies

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A glider on an air track is connected by a spring to the end of the air track. If it takes 0.30 s for the glider to travel the distance of 12 cm from one turning point to the other, its amplitude is

A. 12 cm B. 6 cm C. 24 cm D. 36 cm E. 3.6 cm F. We are not given enough information to answer.

Physics & Space Science

Iridescent colors in the pearly luster of an abalone shell are due to

A) refraction. B) diffraction. C) dispersion. D) polarization. E) interference.

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The large canyon of Mars, Valles Marineris, is a ________ produced when the entire Tharsis region bulged outward causing the surface to split

Fill in the blank(s) with correct word

Physics & Space Science