A wire, 6.0 m long, with a mass of 10 g, is under tension. A transverse wave is propagated on the wire, for which the frequency is 280 Hz, the wavelength is 0.60 m, and the amplitude is 8.4 mm
The time, for a crest of the transverse wave to travel the length of the wire, in ms, is closest to: A) 36
B) 31
C) 40
D) 44
E) 49
A
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A light bulb used in a slide projector draws a current of 6 amperes when operating on 120 volts.The power consumed by the light bulb is 20 watts
a. True b. False Indicate whether the statement is true or false
An enclosed chamber with sound absorbing walls has a 2.0 m × 1.0 m opening for an outside window. A loudspeaker is located outdoors,, 78 m away and facing the window
The intensity level of the sound entering the window space from the loudspeaker is 79 dB. Assume the acoustic output of the loudspeaker is uniform in all directions and that the acoustic energy incident upon the ground is completely absorbed and therefore is not reflected into the window. The threshold of hearing is 1.0 × 10-12 W/m2. The acoustic power entering through the window space is closest to A) 160 µW. B) 79 µW. C) 320 µW. D) 790 µW. E) 1600 µW.
During which step in the website plan shown above would you determine the website's subsidiary pages?
A. Step 1 B. Step 2 C. Step 3 D. Step 4
Which of the sailboats shown sails the fastest in its forward direction?
1) 1 2) 2 3) 3 4) 4 It is interesting to note that 5) this is the only boat that sails forward. 6) only two of the boats sail forward. 7) three out of the four boats sail forward. 8) all sail forward, but at different speeds.