The two days when the Sun rises due east and sets due west are the ________
Fill in the blank(s) with correct word
equinoxes.
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The production of elements heavier than helium by fusion in stars and during supernova explosions is called ______________________
Fill in the blank(s) with correct word
If the radiant energy from the Sun comes in as a plane EM wave of intensity 1340 W/m2, calculate the peak values of E and B. (µ0 = 4p × 10^-7 T×m/A)
a. 1010 V/m, 3.0 × 10^-4 T c. 330 V/m, 3.0 × 10^-4 T b. 330 V/m, 3.35 × 10^-6 T d. 1010 V/m, 3.35 × 10^-6 T
The observed relationship between the masses of central black holes and the bulge masses of galaxies implies that ________
A) the black hole will eventually suck in the rest of the galaxy B) galaxy formation and supermassive black hole formation must be related somehow C) quasars were more common 10 billion years ago than they are today D) the biggest galaxies have the most luminous quasars
Pluto was discovered in
A) ancient times. B) 1789. C) 1859. D) 1930. E) 1992.