Water ripples are produced by making a cork oscillate up and down at a frequency of 5 Hz. The peaks of the ripples are 0.03 meters apart. What is the speed of the water ripples?
0.15 m/s
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What is the angular magnification of a magnifying glass of focal length 4.0 cm if the image is to be viewed by a relaxed eye (image at the far point) having a near point of 25 cm and a far point at infinity?
A) 2.0 x B) 3.0 x C) 3.6 x D) 4.0 x E) 6.3 x
The repeating trends that take place when examining the elements are called
A) periodic. B) the family cycle. C) the metal shift. D) a group conscience. E) none of the above
An infinite plane of charge with
is tilted at a 45° angle to the vertical direction as shown below. The potential difference, VA ? VB, in volts, between points A and B, a 4.50 m distance apart, is
?
?
a.
?7.06.
b.
?9.98.
c.
?14.11.
d.
+7.06.
e.
+9.98.
As a gust of wind blows across a field of grain, a wave can be seen to move across the field as the tops of the plants sway back and forth. This wave is a:
a. transverse wave. c. polarized wave. b. longitudinal wave. d. interference of waves.