What is meant by the microwave observations of the cosmic background radiation revealing the "genetic code" of the universe?
What will be an ideal response?
The latest microwave observations of the cosmic microwave background are sensitive enough to detect tiny temperature variations across the sky. These correspond to slight density enhancements at the end of the era of nuclei which magnified under the force of gravity to become the large scale structures—voids, superclusters, etc.—that we see at the present time. The present conditions of the universe are dependent on the structure of these initial density fluctuations, and for this reason it is analogous to the genetic code of DNA in a living organism.
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Which of the following are the jovian planets?
A) Jupiter, Saturn, Uranus, Neptune, and Pluto B) only Jupiter C) only Jupiter and Saturn D) Jupiter, Saturn, Uranus, and Neptune only E) everything past Mars and the asteroid belt
What is the one piece of evidence that suggests that the dinosaurs were made extinct by the impact of an asteroid 65 million years ago?
A) the crater from this impact can still be seen in the deserts of Arizona B) a layer of sediment laid down at that time contains grains of shocked quartz, solidified rock droplets, and soot from global wildfires C) a layer of sediment laid down at that time is littered with dinosaur fossils D) dinosaur fossils are found in rock layers older than 65 million years but not younger than 65 million years
The most massive galaxies in the universe are
A) ellipticals. B) spirals. C) lenticulars.
A particle (m = 20 mg, q = ?5.0 ?C) moves in a uniform electric field of 60 N/C in the positive x direction. At t = 0, the particle is moving 25 m/s in the positive x direction and is passing through the origin. How far is the particle from the origin at t = 2.0 s?
A. 80 m B. 20 m C. 58 m D. 10 m E. 30 m