The Big Bang theory seems to explain how elements were formed during the first few minutes after the Big Bang. Which hypothetical observation (these are not real observations) would call our current theory into question?
A) the discovery of a galaxy with a helium abundance of only 10% by mass
B) the discovery of a star-like object made almost entirely of carbon and oxygen
C) the discovery of a planet that with no helium in its atmosphere
D) the discovery of a galaxy with 27% helium by mass
A) the discovery of a galaxy with a helium abundance of only 10% by mass
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An atom in face centered cubic aluminum has ______________nearest neighbors.
Fill in the blank(s) with the appropriate word(s).
The basic molecular building blocks of proteins are
A) nucleotides B) fatty acids C) amino acids D) monosaccharides
The buoyant force of the atmosphere on a body is equal to the
A) weight of air displaced. B) volume of air displaced. C) mass of the air displaced. D) all of the above E) none of the above
What is the purpose of the European CHEOPS mission?
A) to precisely measure the properties of known extrasolar planets B) to discover new types of extrasolar planets unobservable with current instruments C) to search for signals from alien civilizations D) to search for new extrasolar planets throughout the entire sky