The process whereby heat flows by means of molecular collisions is referred to as
A)
conduction.
B)
convection.
C)
radiation.
D)
inversion.
E)
evaporation.
A
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General Relativity: Suppose a 70-kg student were to be compressed to form a black hole. What would be the Schwarzschild radius of this black hole? (G = 6.67 × 10-11 N ? m2/kg2, c = 3.0 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
A conical pendulum is constructed with a string 2.5 m in length. The pendulum is set in horizontal circular path about the vertical axis. If the angular velocity of the conical pendulum is a constant 2.8 rad/s, then the angle the string makes with the vertical axis is
A. 48 degrees. B. 60 degrees. C. 71 degrees. D. 75 degrees. E. 80 degrees.
Consider an atom of carbon in which the nucleus contains six protons and seven neutrons. What is its atomic number and atomic mass number?
A) atomic number = 6; atomic mass number = 13 B) atomic number = 6; atomic mass number = 7 C) atomic number = 13; atomic mass number = 6 D) atomic number = 7; atomic mass number = 13
The sweeping of atmospheric gas particles into space by the Sun is referred to as
A) a solar flare B) solar wind stripping C) evaporation D) thermal escape