The eye parts iris, retina, cornea, and ciliary muscle, play roles related to ________, ________, ________, and ________ in a camera
a. the aperture, the lens, the ccd, focusing
b. the aperture, the ccd, the lens, focusing
c. the lens, the aperture, focusing, the ccd
d. the lens, focusing, the ccd, the aperture
b
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The force due to gravity between two objects can be described using the equation Fg = G M1 M2 / d2. In this equation, what does d represent?
A) the density of the smaller object B) the distance between the two objects C) the universal gravitational constant
A newton is larger than a pound
a. True b. False Indicate whether the statement is true or false
A circuit consists of a 9.3-mH coil, a 16.0-V battery, a parallel combination of a 19-? resistor and a 6.0-? resistor, and a switch, all in series. What is the time constant of this circuit?
a. 3.7E–4 s b. 2.0E–3 s c. 4.9E–4 s d. 3.3E–2 s e. This circuit has 2 time constants.
A transverse periodic wave is represented by the equation y(x, t) = 2.50 cm cos(2,500 rad/s t - 15.0
x). What is the k vector of the wave?
A. 15.0 
in the - x direction
B. 15.0 in the + x direction
C. 30.0 in the + y direction
D. 30.0 in the - y direction
E. 45.0
in the + x direction