Instructions: On occasion, the notation 
will be a shorthand notation for 
.
Which statement is true about the unit vectors 
, 
and 
?
A.
B.
C.
D.
is directed east and is directed south, points up out of the surface.E.
Answer: B
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The pitch of a sound is determined by
A) the amplitude. B) the speed. C) the frequency. D) the wavelength. E) none of the above
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An alpha particle (charge = +2e) is sent at high speed toward a gold nucleus (charge +79e). What is the electrical force acting on the alpha particle when it is at a distance of 2 × 10^?14 m away from the gold nucleus? (e = 1.6 × 10^?19 C)