A description of the severity of the damage caused by an earthquake is given by its ranking on the ______________ scale
Fill in the blank(s) with correct word
modified Mercalli
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What is the composite volcano shape?
What will be an ideal response?
In the symbol for the Hubble type of a galaxy, SBc, the "B" denotes
A. the presence of a bar B. a large bulge component C. loosely wound spiral arms D. the presence of a ring E. tightly wound spiral arms
Why does the Big Bang theory predict that the cosmic background radiation should have a perfect thermal radiation spectrum?
A) The background radiation came from the heat of the universe, with a peak corresponding to the temperature of the universe. B) The spectrum of pure hydrogen is a perfect thermal radiation spectrum. C) The spectrum of 75 percent hydrogen and 25 percent helium is a perfect thermal radiation spectrum. D) The light from all the stars and gas in the sky averaged over the entire universe is a perfect thermal radiation spectrum. E) It doesn't predict that the cosmic background radiation should have a perfect thermal radiation spectrum.
A certain astronomical telescope has a diameter of 5.60 m. What is the minimum angle of resolution for this telescope when it is forming images using light of wavelength 620 nm?
A) 1.11 × 10-7 rad B) 3.11 × 10-7 rad C) 2.70 × 10-7 rad D) 1.35 × 10-7 rad E) 4.05 × 10-7 rad