ankitunluckyalone
New member
will give you 10 points please? 1 . A particular guitar string is supposed to vibrate at 200 Hz, but it is measures to actually vibrate at 205 Hz. By what % should the tension in the string be changed to get the frequency to the correct value?
2 Compare the intensities and the amplitude of the earthquake wave as it passes two points 10 Km and 20 Km from the source
3 A cord of mass 0.55 Kg is stretched between the two supports 30m apart. If the tension in the cord is 150 N, how long will it take a pulse to travel form one support to the other?
4 What are the lowest and the highest frequencies that an ear can detect when the intensity level is 30dB.
5 A pipe in air at 20 C is to be designed to produce two successive harmonics at 240 Hz and 280Hz. How long the pipe must be, and is it open or closed
6 How many overtones are present within the audible range for a 2.44m long organ pipe at 20 C if it is (i) open (ii) closed
7 Ultrasound waves are used to measure blood flow speeds. Suppose that a device emits a sound at 500kHz , and the speed of sound in the human tissue is taken to be 1540m/s. What is the expected beat frequency if the blood is flowing normally in large artery at2 cm/s directly away from the sound source?
2 Compare the intensities and the amplitude of the earthquake wave as it passes two points 10 Km and 20 Km from the source
3 A cord of mass 0.55 Kg is stretched between the two supports 30m apart. If the tension in the cord is 150 N, how long will it take a pulse to travel form one support to the other?
4 What are the lowest and the highest frequencies that an ear can detect when the intensity level is 30dB.
5 A pipe in air at 20 C is to be designed to produce two successive harmonics at 240 Hz and 280Hz. How long the pipe must be, and is it open or closed
6 How many overtones are present within the audible range for a 2.44m long organ pipe at 20 C if it is (i) open (ii) closed
7 Ultrasound waves are used to measure blood flow speeds. Suppose that a device emits a sound at 500kHz , and the speed of sound in the human tissue is taken to be 1540m/s. What is the expected beat frequency if the blood is flowing normally in large artery at2 cm/s directly away from the sound source?