The Pleiades (or Seven Sisters) an example of a(n) ________
Fill in the blank(s) with correct word
open cluster
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Comets were likely a major agent in bringing both water and organic molecules to the surface of the early Earth
Indicate whether the statement is true or false
If a planet has 3 times the radius of the Earth, but has the same density as the Earth, what is the gravitational acceleration at the surface of the planet? (g = 9.80 m/s2)
a. 29.4 m/s2 b. 88.2 m/s2 c. 265 m/s2 d. 3.27 m/s2
Which statement is always correct when applied to a charge distribution located in a finite region of space?
a. Electric potential is always zero at infinity. b. Electric potential is always zero at the origin. c. Electric potential is always zero at a boundary surface to a charge distribution. d. Electric potential is always infinite at a boundary surface to a charge distribution. e. The location where electric potential is zero may be chosen arbitrarily.
At the moment of a total eclipse, the moon lies along a line from the Earth to the sun. If your normal weight is 600 N, how much is your weight decreased by the combined pull of the sun and moon? MSUN = 2.0 × 10^30 kg, rS-E = 1.5 × 10^8 km MMOON = 7.4 × 10^22 kg, rM-E = 3.8 × 10^5 km