In 1928, the International Astronomical Union (IAU) established _______________ official constellations with carefully defined boundaries that together include every part of the sky
Fill in the blank(s) with correct word
88
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On the Sun, what takes approximately 22 years to happen?
A) The Sun takes that time to rotate on its axis. B) The complete sunspot cycle, including magnetic field reversals. C) Solar vibrations begin every 22 years. D) Solar activities goes from its maximum to minimum. E) The corona reaches its maximum temperature and ejects gas every 22 years.
Potential energy may be positive or negative
Indicate whether the statement is true or false
Why are emission nebulae ideal places to go hunting for brown dwarfs?
What will be an ideal response?
A pair of parallel plates, forming a capacitor, are connected to a battery. While the capacitor is still connected to the battery maintaining a constant voltage, the plates are pulled apart to triple their original distance. What is the ratio of the final energy stored to the original energy stored?
a. 3 b. 1 c. 1/3 d. 1/9 e. 9