Reference no: EM139424
Q 1. The highest musical note on a piano has a frequency of 4,286 Hz. Why would a tape of piano music sound terrible if played on a tape player that reproduces frequencies only up to 5,000 Hz?
2. A steel cable with a total length 30 m and mass 100 kg is connected to two poles. The tension in the cable is 3,000 N, and the wind makes the cable vibrate with the frequency of 2 Hz. compute the wavelength of resulting wave on the cable.
3. A 1,750 Hz pure tone is played on a stereo in an open field. A person stands at a point that is 4 m from one of the speakers and 4.5 m from the other. Does the person hear tone? Clarify.
4. Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength of an ultrasound waves themselves. What is a size of the smallest feature observable in human tissue while examined with 25 MHz ultrasound? The speed of sound in human tissue is 1,640 m/s.
5. Ultrasound can be used to measure the thickness of protective coatings applied to surfaces as part of industrial processes since it reflects well from boundaries separating regions with different densities. How thick is the layer of plastic coating on a metal substrate that produces ultrasound echoes from upper and lower surfaces having round-trip times that differ by 0.77 us. Assume the speed of sound in the plastic is 800 m/s.
6. A person stands at a point 400 m in front of the face of a sheer cliff, if the person shouts, how much time would elapse before an echo is heard?
7. A 78 kg man drops from rest on a diving board -3.5m above the surface of the water and comes to rest .59 s after reaching the water. What force does water exert on the man? Answer in units of N
8. What are the frequencies of first four harmonics of middle C (261.6Hz)?
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Why the target should the rifle barrel be pointed
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What is the frictional force exerted on book
: If a person radiates about 66 W of power at room temperature, how long does it take for person to radiate away the energy acquired by consuming a 230 Calorie doughnut.
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The height between point p and the ground is 3m
: A steel ball of mass M is released from rest at point P. It follows a smooth curved rail to point Q and finally reaches point R with K.E. of 7J. The speed of the ball at point Q is 2MS-1 and the height between point P and the ground is 3m. Then find ..
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The sound level measured in the room by a person
: The sound level measured in the room by a person watching a movie in a home theatre system varies from 63 dB throughout a quiet part to 92 dB throughout a loud part. In the order of how many times louder is the latter sound.
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What force does water exert on the man
: Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength of an ultrasound waves themselves. What is a size of the smallest feature observable in human tissue while examined with 25 MHz ultrasound? The speed of..
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Illustrate how the device equipped with ultrasonic speaker
: Sam, who's mass is 79 kg, takes off across level snow in his jet powered skis. The skis have a thrust of 204 N and a coefficient of kinetic friction on snow of 0.1. Unfortunatately the skis run out of fuel after only 13 s.
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What is the mass of the liquid in vat
: You are to program a robotic arm on the assembly line to move in a xy-plane. Its first displacement is; its second displacement is, of magnitude 6.51 and direction 62.7 measured in the sense from +x-axis toward -y-axis. The resultant of the two displ..
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What is the charge on each
: A force vector points at an angle of 50.6° above the +x axis. It has a y component of +280 newtons. Calculate the magnitude of the force vector.
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What is the mass of that sculpture
: A rabbit runs in the straight line with a velocity of +1.6 m/s for a period of time, rests for 12 s, and then runs again along the equivalent line at +0.52 m/s for an unidentified amount of time. The rabbit travels the total distance of 1224 m, and i..
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