The frequency of a periodic wave is 325 Hz. If the wavelength is 50.0 cm, then what is the velocity of the wave?
A. 163 m/s
B. 203 m/s
C. 237 m/s
D. 285 m/s
E. 316 m/s
A. 163 m/s
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Some recent evidence points to the possibility of there being some liquid water on Mars "recently." Why does this puzzle astronomers?
A. Currently Mars is too hot for liquid water. B. The Martian atmosphere is too cold and has too low a pressure for liquid water. C. The Martian atmosphere is too thick, and clouds would form. D. All of these choices are correct.
Frequency and amplitude are independent of each other.
Answer the following statement(s) true (T) or false (F)
The intensity level of sound 30 m from a jet airliner is 120 dB. At what distance from the airplane will the sound intensity level be a tolerable 100 dB? (Assume spherical spreading of sound.)
a. 60 m c. 300 m b. 90 m d. 400 m
A ship is being pulled through a harbor at constant velocity by two tugboats as shown in the figure. The lines attached to the two tugboats have the same tension of 200,000 N
Each line makes an angle of 28.0° with the direction the ship is being towed. What is the magnitude of the drag force due to the water on the ship? A) 177 × 105 N B) 1.88 × 105 N C) 93.9 × 104 N D) zero E) 3.53 × 105 N