Molly measures a Hubble constant of 20 km/sec/million light-years. Sam measures a Hubble constant of 25 km/sec/million light-years. All other assumptions being the same, which person would estimate a LARGER age to the universe?
A) Sam
B) Molly
C) They both would measure the same age.
B
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The geocentric model of the solar system is attributed to
a. Kepler. b. Brahe. c. Copernicus. d. Aristotle.
Which fundamental quantity does the average person measure most often every day?
a. Mass b. Length c. Time d. Electric charge
Magnetic Field of a Current Loop: Consider two current-carrying circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. If the magnetic field strength at the center of the smaller loop is B, what is the magnetic field strength at the center of the larger loop?
A. 8B B. 4B C. 2B D. B/2 E. B/4
It is possible to observe the surface of a material in a TEM by making a(n) _________of the surface.
Fill in the blank(s) with the appropriate word(s).