Spectrographic analysis of light from a distant galaxy shows that the galaxy is receding from Earth at v = 0.384 c. Use Hubble's law with H = 17 km/s/106 lightyears to estimate the distance to the galaxy.
a. 3.3 108 lightyears
b. 6.8 109 lightyears
c. 9.9 108 lightyears
d. 2.2 109 lightyears
e. 6.5 106 lightyears
[Ques. 2] If it is 1:00 P.M. EST in Washington, D.C., what is the time in Denver, Colorado, the longitude of which is 30 more westerly?
a. 9:00 A.M. MST
b. 11:00 A.M. MST
c. 3:00 P.M. MST
d. Noon. MST
[Ques. 3] How much heat is necessary to change 30 g of water at 10C into water at 80C?
a. 0.21 kcal
b. 2.1 kcal
c. 4.5 kcal
d. 0.51 kcal
[Ques. 4] 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
[Ques. 5] If it is 10:00 A.M. EST in Washington, D.C., what is the time in Denver, Colorado, the longitude of which is 30 more westerly?
a. 12 noon MST
b. 8:00 A.M. MST
c. 10:00 A.M. MST
d. 9:00 A.M. MST
[Ques. 6] How much heat is necessary to change 10 g of ice at 20C into water at 10C?
a. 0.02 kcal
b. 0.2 kcal
c. 1 kcal
d. 0.08 kcal
[Ques. 7] The law of conservation of baryon number is that
a. the total number of baryons and leptons is conserved.
b. the total number of baryons is conserved.
c. the (number of baryons) (number of antibaryons) is conserved.
d. the total number of quarks is conserved.
e. the (number of baryons) + (number of antibaryons) is conserved.
[Ques. 8] The longest day (daylight) of the year for the Northern Hemisphere occurs at the time of the
a. autumnal equinox.
b. vernal equinox.
c. winter solstice.
d. summer solstice.
[Ques. 9] Which of the following has the highest thermal conductivity?
a. Air
b. A newspaper
c. A rug
d. An aluminum saucepan
[Ques. 10] Particles composed of quarks are
a. photons.
b. leptons.
c. neutrinos.
d. W and Z bosons.
e. baryons and mesons.
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