The gold in Uncle Harry's teeth fillings originated in
A) the deep interior of the Earth.
B) fusion processes that date back about 5.5 billion years.
C) the Big Bang.
D) stars that blew up eons ago.
E) Fort Knox.
Answer: D
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Fill in the blank(s) with the appropriate word(s).
Thin Films: What is the minimum thickness of a soap bubble film with refractive index 1.38 that results in a constructive interference in the reflected light if this film is illuminated by a beam of light of wavelength 610 nm?
A. 222 nm B. 111 nm C. 333 nm D. 444 nm E. 555 nm
Which of the following characteristics describes silicate minerals?
-Silicate minerals contain only silicon. -Silicate minerals make up 8 percent of Earth's crust. -Silicate minerals contain calcite and dolomite. -Silicate minerals contain halite and gypsum. -Silicate minerals contain silicon and oxygen.
Where did the elements heavier than hydrogen and helium come from?
A) They were produced in the Big Bang. B) They evolved from hydrogen and helium shortly after the Big Bang. C) They were produced inside dense interstellar gas. D) They were produced inside stars. E) All of the above