What is the name of a sudden, highly energetic, eruptive explosion on the surface of the Sun?
A. flare
B. coronal hole
C. granulation
D. sunspot
Answer: A
You might also like to view...
A far sighted person can not see clearly objects that are closer to his eyes than 60.0 cm
Which one of the following combinations represents the correct focal length and the refractive power of the contact lenses that will enable him to see the objects at a distance of 25.0 cm from his eyes? A) -42.9 cm, +2.33 diopters B) -42.9 cm, -2.33 diopters C) +42.9 cm, +2.33 diopters D) +42.9 cm, -2.33 diopters E) +60 cm, +42.9 diopters
The density of the Sun is most similar to which object?
A) Halley's Comet's nucleus B) the Earth C) Mercury D) the Moon E) Jupiter
If you have 7 total 100-W light bulbs in a parallel circuit in your basement and you leave them on for 1.5 days, how much energy (in kilowatt hours) would be used?
a. 25.2 kWh b. 1050 kWh c. 3520 kWh d. 25200kWh
Wood from an ancient stump has a ratio of carbon-14 to carbon-12 that is one-eighth that of new wood. About how old is the stump? (Carbon-14's half-life is 5730 years.)