The Virgo cluster
a. is the galactic cluster that contains the Milky Way.
b. is the oldest known cluster of galaxies.
c. is located at the center of the universe.
d. contains mostly spiral galaxies and very few elliptical galaxies.
e. is a rich cluster and the closest cluster of galaxies outside of the Local Group.
e
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The mass of a sulfur atom is 32.0 u, and the mass of a fluorine atom is 19.0 u. What is the mass of a mole of sulfur hexafluoride (SF6)?
a. 41.0 g b. 20.5 g c. 106 g d. 146 g e. 211 g
Define shepherd moons and give an example of them at work
What will be an ideal response?
A Hooke's law spring is compressed a distance d and is used to launch a particle of mass m vertically to a height h above its starting position. Under double the compression, the spring is now used to launch a particle of mass 2m. How high does the second mass rise above its starting position?
a. h b. 2h c. 3h d. 4h
The time derivative of a vector is a:
A. Either a scalar or a vector. B. Tensor. C. Scalar. D. Vector.