Which of the following eons is the oldest?
a. Proterozoic
b. Phanerozoic
c. Hadean
d. Archean
c
Physics & Space Science
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A positive and a negative charge near each other are released. As they move, the force on each particle
A) increases. B) decreases. C) stays the same.
Physics & Space Science
A +4.0-?C charge is placed on the x axis at x = +3.0 m, and a ?2.0-?C charge is located on the y axis at y = ?1.0 m. Point A is on the y axis at y = +4.0 m. Determine the electric potential at point A (relative to zero at the origin)
a. 6.0 kV b. 8.4 kV c. 9.6 kV d. 4.8 kV e. 3.6 kV
Physics & Space Science
What was the nationality of the first persons who we know speculated about "elements"?
a. Chinese b. Egyptian c. Greek d. Roman
Physics & Space Science
For stars on the main sequence, the luminosity can be estimated by the formula L = ____________________
Fill in the blank(s) with correct word
Physics & Space Science