A container of water is placed on a scale, and the scale reads 120. g. Now a 20.0g piece of copper (specific gravity = 8.90 ) is suspended from a thread and lowered into the water, not touching the bottom of the container
What will the scale now read? A) 140 g
B) 120 g
C) 138 g
D) 122 g
E) 112 g
D
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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.
When the number of protons in a nucleus exceeds ______________, the nucleus is unstable
a. 65 b. 56 c. 83 d. 103
According to the quantum mechanical model of the hydrogen atom, if the principal quantum number is n, how many different orbital angular momentum quantum number(s) are permitted?
A) n/2 B) n C) 2n D) 3n E) 4n
Consider a solenoid of length L, N windings, and radius b (L is much longer than b). A current I is flowing through the wire. If the radius of the solenoid were doubled (becoming 2b), and all other quantities remained the same, the magnetic field
A) would remain the same. B) would become twice as strong. C) would become one half as strong.