Why does the plasma tail of a comet always point away from the Sun?
A) It is allergic to sunlight.
B) Gases from the comet, heated by the Sun, push the tail away from the Sun.
C) Radiation pressure from the Sun's light pushes the ions away.
D) The conservation of the angular momentum of the tail keeps it always pointing away from the Sun.
E) The solar wind blows the plasma ions directly away from the Sun.
E
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Some species of whales can dive to depths of one kilometer. What is the total pressure they experience at this depth? (?sea = 1 020 kg/m3 and 1.01 × 10^5 N/m2 = 1 atm.)
a. 9.00 atm b. 90.0 atm c. 100 atm d. 111 atm e. 130 atm
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A) a fluorescent lamp. B) an incandescent lamp. C) both of these D) neither of these
The main sequence is luminosity class V
Indicate whether the statement is true or false
In a spectroscopic binary, the star whose lines shift the most weighs the most
Indicate whether the statement is true or false