Which of the following best describes the nature of planetary rings?
a. They are composed of countless individual particles.
b. The are solid, concentric rings around a planet.
c. They are a solid sheet of material around a planet, looking much like a DVD or blu-ray disk.
d. They are composed of reflective molecules of gas.
They are composed of countless individual particles.
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__________ galaxies contain large clouds of gas and dust, both young and old stars, but have no obvious spiral arms or nucleus
a. Irregular b. S0 c. E7 d. Sa e. E0
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Answer the following statement true (T) or false (F)
Which of the following gases in Earth's atmosphere is not primarily a product of volcanic outgassing?
A) water (H2O) B) nitrogen (N2) C) oxygen (O2) D) carbon dioxide (CO2)
A linear charge of nonuniform density ? = bx, where b = 2.1 nC/m2, is distributed along the x axis from x = 2.0 m to x = 3.0 m. Determine the electric potential (relative to zero at infinity) of the point y = 4.0 m on the y axis
a. 36 V b. 95 V c. 10 V d. 17 V e. 15 V