A transverse periodic wave is represented by the equation z(y, t) = 1.50 cm sin(1,250 rad/s t + 10.0
y). What is the k vector of the wave?
A. 10 
in the + y direction
B. 10 
in the - y direction
C. 20 
in the + z direction
D. 20
in the - z direction
E. 10
in the - z direction
B. 10 in the - y direction
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No work is done by gravity on a bowling ball that rolls along a bowling alley because
A) no force acts on the ball. B) little distance is covered by the ball. C) the force on the ball is at right angles to the ball's motion. D) the ball's speed remains constant.
A galvanometer calibrated to read potential difference is
A) an ammeter. B) a voltmeter. C) an ohm meter. D) none of the above
A cola drink is a good example of
a. a compound. b. a heterogeneous mixture. c. a homogeneous mixture. d. an element.
The gravitational field at the moon due to the earth is (the mass of the earth is 
kg, the distance to the moon is 
m)
A. 
N/kg toward the earth.
B. 
N/kg away from the earth.
C. 
N/kg away from the earth.
D. 
N/kg toward the earth.
E. 
N/kg toward the earth.