How much cooler is the universe now (at an age of 4 × 1017 s) than it was at an age of 1 second?
A) Its current temperature is one hundred-millionth (10-8) the temperature at an age of 1 second.
B) Its current temperature is one hundred-thousandth (10-5) the temperature at an age of 1 second.
C) Its current temperature is one-hundredth (10-2) the temperature at an age of 1 second.
D) Its current temperature is one ten-billionth (10-10) the temperature at an age of 1 second.
D) Its current temperature is one ten-billionth (10-10) the temperature at an age of 1 second.
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A simple beam AB with an overhang BC is loaded as shown in the figure. The bending moment at the midspan of AB is approximately:
(A) 8 kN?m
(B) 12 kN?m
(C) 17 kN?m
(D) 21 kN?m
The length of a 100-meter long spaceship passing by you at 0.87c is seen to be
A) 50 m. B) 87 m. C) 100 m. D) 125 m. E) 150 m.
The dome of water associated with a hurricane making landfall is called a
a. storm surge. b. tide. c. tidal wave. d. flood.
On what four assumptions is the principle of faunal succession based?
What will be an ideal response?