Relate the age of the universe to the Hubble constant
What will be an ideal response?
Inverting the Hubble constant and putting all distances in kilometers, gives us the age of the universe in seconds, assuming that Ho has never changed.
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In the UNS designation system, high-strength low-alloy steels start with the letter _________.
Fill in the blank(s) with the appropriate word(s).
If the sun is at one focus of the ellipse, what is at the other focus?
What will be an ideal response?
The idea that other civilizations are waiting for us to reach a certain technological level before revealing themselves to us is referred to as the
A) conspiracy hypothesis B) UFO hypothesis C) sentinel hypothesis D) zoo hypothesis
Farsightedness can usually be corrected with
A) convex lenses. B) concave lenses. C) convex mirrors. D) cylindrical lenses. E) concave mirrors.