A sound wave in air travels at a speed of 340 m/s. If the wavelength is 0.100 m, in what range of the sound spectrum is the wave?
Audible (3400 Hz)
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An athlete competing in long jump leaves the ground with a speed of 9.14 m/s at an angle of 35.0° above the horizontal. How long does the athlete stay in the air?
A) 0.501 s B) 0.876 s C) 1.07 s D) 2.53 s E) 0.535 s
The emphasis of the orange-and-apple sequence in your text is
A) to define systems. B) that actions equal reactions. C) that forces produce accelerations. D) defining friction as a force. E) that mass is not a force.
The zirconium nucleus contains 40 protons, and an electron is 1.0 nm from the nucleus. What is the electric force exerted on the electron by the nucleus? ( e = 1.60 × 10-19 C, k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 2.9 nN B) 1000 C C) 3.7 nN D) 6.8 nN E) 9.2 nN
The four tires of an automobile are inflated to a gauge pressure of 2.0 × 10^5 N/m2 (29 PSI). Each of the four tires has an area of 0.024 m2 that is in contact with the ground. Determine the weight of the auto