Three point charges are positioned as follows: 
is at (0.00 m, 0.00 m), 
is at (1.20 m, 0.00 m), and
at (1.20 m, 1.60 m). If
what is the magnitude of the force on 
a. 
b. 
c. 
d. 
e. 
a.
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An electron and an alpha particle (a helium-4 nucleus) each have the same non-relativistic speed. Which has the greatest kinetic energy, and which has the shortest de Broglie wavelength?
a. the alpha particle, the alpha particle b. the alpha particle, the electron c. the electron, the alpha particle d. the electron, the electron
According to the second law of thermodynamics, for any process that may occur within an isolated system, which one of the choices applies?
A) Entropy remains constant. B) Entropy increases. C) Entropy decreases. D) Both A and B are possible. E) Both A and C are possible.
The planet(s) of our solar system that are never visible to the naked eye are
a. Pluto. b. Mercury, Neptune, and Pluto. c. Saturn, Uranus, Neptune, and Pluto. d. Neptune and Pluto. e. Mercury and Venus.
Suppose you electrically charge a comb by running it through your hair. If you then shake this comb back and forth one time every second, you will create
A) an electromagnetic wave having a frequency of 1 Hz and a speed of 300,000 km/s. B) a sound wave having a frequency of 1 Hz and a speed of 300,000 km/s. C) an electromagnetic field that vibrates at a frequency of 1 Hz, but no electromagnetic wave is created. D) the tooth fairy. E) a sound wave having a wavelength of 300,000 km and a speed of 300,000 km/s.