What must you do to get away from the harmful effects of radioactivity?
A) live at the North or South Poles.
B) go deep beneath Earth's surface.
C) go to the Moon.
D) die.
Answer: D
Physics & Space Science
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The Lewis symbol 
would be characteristic of which group?
a.
6A
b.
2A
c.
3A
d.
5A
Physics & Space Science
From what part of the H-R diagram have the giants in a star cluster evolved?
What will be an ideal response?
Physics & Space Science
At a certain time, the average size of a transistor in a microprocessor was 250 nanometers. A human hair has a diameter of 70 microns (micrometers). How many transistors fit across a human hair?
A) 280 B) 28 C) 2800 D) 2.8 E) 0.28
Physics & Space Science
Sunlight reflected from interplanetary dust results in the appearance of ______________
Fill in the blank(s) with correct word
Physics & Space Science