A ____________ is a large, bright, gaseous feature extending outward from the Sun's surface, often in a loop shape.
A) Sunspots
B) Prominence
C) Solar flare
D) Photosphere
Ans: B) Prominence
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Absorption lines in the spectra of supergiant stars are broader than the same spectral lines in main sequence stars of the same spectral type
Indicate whether the statement is true or false
When a gas is changed to a liquid, the gas
A) releases energy. B) absorbs energy. C) both of these D) neither of these
You hit a handball too hard, and it lands horizontally on top of a roof. If its original velocity was vo at an angle ? above the horizontal, then it lands on the roof with a velocity of
A) vo sin ? B) 2vo C) vo cos ? D) zero E) vo
If a = 3.0 mm, b = 4.0 mm, Q1 = 60 nC, Q2 = 80 nC, and q = 32 nC in the figure, what is the magnitude of the electric force on q?
a.
1.6 N
b.
1.3 N
c.
1.9 N
d.
2.2 N
e.
0.040 N