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.

Physics & Space Science

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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

Physics & Space Science

The dome of water associated with a hurricane making landfall is called a

a. storm surge. b. tide. c. tidal wave. d. flood.

Physics & Space Science

On what four assumptions is the principle of faunal succession based?

What will be an ideal response?

Physics & Space Science

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.

Physics & Space Science