When we look at the farthest galaxies in the Hubble Ultra Deep Field we can see their light from:
A.) About 12 or 13 billion years ago.
B.) About 4.5 billion years ago.
C.) About 1 or 2 billion years ago.
D.) About 4 million years ago.
Ans: A.) About 12 or 13 billion years ago.
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In the development of a terrestrial planet, the stage of ___________ when dense material settled to the core and less dense to the outer parts
a. differentiation b. cratering c. glaciation d. accretion e. flooding
How does the thickness of a lens relate to it being converging or diverging?
What will be an ideal response?
A 6.0-? and a 12-? resistor are connected in parallel across an ideal 36-V battery. What power is dissipated by the 6.0-? resistor?
A) 48 W B) 220 W C) 490 W D) 24 W
According to calculations made by modern astronomers, the age of the universe is close to
A) 14 billion years. B) 7 billion years. C) 21 billion years. D) 6000 years.