Which of the following quantities is equal to the energy per second generated by fusion in the Sun's core?
A) the force of gravity holding the Sun together
B) the temperature of the Sun's core
C) the temperature at the Sun's photosphere
D) the luminosity of the Sun's photosphere
D) the luminosity of the Sun's photosphere
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About what percent of all asteroids are S-type asteroids?
A) 5% B) 10% C) 15% D) 50% E) 75%
In the two-slit experiment, monochromatic light of wavelength 600 nm passes through a pair of slits separated by 2.20 × 10-5 m. What is the angle corresponding to the first bright fringe?
A) 1.56° B) 2.22° C) 3.12° D) 4.70° E) 6.24°
The universe was two minutes old when ________ started to form from deuterium fusion
Fill in the blank(s) with correct word
Automobile engine blocks are made with _________cast iron.
Fill in the blank(s) with the appropriate word(s).