What three main observed phenomena are the strongest support for the "big bang" theory?
What will be an ideal response?
The Hubble law demonstrates that the Universe is expanding at a rate proportional to galaxy distances. Nearby galaxies have small redshifts, and more distant galaxies have large redshifts.
The existence of the cosmic microwave background radiation is an extra low-level signal, which provides evidence for the release of energy at every point in the Universe at the time of its creation, with a temperature that perfectly matches expectations.
Basic principles of nuclear physics predict the relative amounts of hydrogen, helium and lithium that were created in the big bang.
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Many galaxies with erupting black holes are found ____
a. in poor clusters with little intergalactic gas b. isolated in space c. in one of a pair of orbiting galaxies d. very close to the Milky Way galaxy e. in the Local Group
If ? = 40°, ? = 60°, and M = 4.0 kg, determine the tension in string 1.
A. 15 N B. 22 N C. 17 N D. 20 N E. 36 N
The ultimate truth of any radiometric date depends on the
A) size of the given sample. B) chemical composition of the sample being tested. C) precision and accuracy of the lab techniques. D) reset date of the sample.
The peculiar system SS 433 I. is emitting beams of energy and matter. II. is producing a spectrum with both a red and a blue shift. III. probably contains an accretion disk. IV. is the result of a planetary nebula
a. I b. III c. II & III d. I, II, & III e. I, II, III, & IV