The type of radio galaxy that reveals its motion through the intergalactic medium is called a
A) Seyfert. B) head-tail. C) quasar. D) bipolar jet. E) dual lobe.
B
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Mesons are composed of
A. any odd number of quarks. B. three quarks of matching color. C. three quarks of three different colors. D. a colorless quark-antiquark pair.
Planets would crash into the Sun if it weren't for
A) their tangential velocities. B) their vast distances from the Sun. C) the inverse-square law. D) their relatively small masses. E) the fact that they are beyond the main gravitation of the Sun.
The plastic-like substratum on which the lithospheric plates move is called the
a. outer core. b. endosphere. c. isosphere. d. asthenosphere.
A glass rod is rubbed with nylon. The rod is then brought close to the metal knob of an electroscope. A person's finger briefly touches the knob on the far side and is then removed. After the rod is removed the charge on the electroscope will be ________.
Fill in the blank(s) with the appropriate word(s).