When the frequency of the source of a water wave increases, the speed of the waves traveling in the water
a. remains unchanged.
b. increases.
c. decreases.
d. cannot be determined.
a
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A force of 3.8N directed along the positive x-axis combines with a second force directed along the positive y-axis to produce a total force vector of magnitude 6.1N. What is the magnitude of the second vector?
A. 2.7N B. 9.5N C. 23.5N D. 4.8N E. Not enough information is given.
In the figure, a 1.6-kg weight swings in a vertical circle at the end of a string having negligible weight. The string is 2 m long. If the weight is released with zero initial velocity from a horizontal position, its angular momentum (in kg?m2/s) at the lowest point of its path relative to the center of the circle is approximately
a.
40
b.
10
c.
30
d.
20
e.
50
A car is driven 1200 m north at 20.0 m/s and then driven 1600 m east at 25.0 m/s. What are the magnitude and direction of the displacement for this trip?
a. 1400 m, northeast b. 2000 m, 36.9° north of east c. 2000 m, 53.1° north of east d. 2800 m, 36.9° east of north e. 2800 m, 53.1° east of north
A terminal moraine marks the
A) farthest a glacier can spread from side-to-side. B) location where a glacier started to form. C) farthest point of a glacier's advance. D) location where outwash forms.