Which of the following is not believed to be composed of quarks?
A) alpha particle
B) beta particle
C) proton
D) neutron
E) pion
B
Physics & Space Science
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The apparent visual magnitude difference between two stars is 10 and thus the approximate intensity ratio is 10,000
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
Early human culture, involving villages and a sense of history, could best be described as a(n)
A) industrial culture. B) migratory culture. C) hunting culture. D) scientific culture. E) agri-culture.
Physics & Space Science
What is the apparent path of the Sun against the background of stars?
a. ecliptic b. zenith c. nadir d. elliptic e. shadow
Physics & Space Science
Automobile engine blocks are made with _________cast iron.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science