Young's modulus for steel is 20*10^10 N/m^2 and the density is 7.8*10^3 kg/m^3. The bulk modulus for water is 2.2*10^9 N/m^2 and the density is 1.0*10^3 kg/m^3 A. What is the speed of sound in steel ? B. What is the speed of sound in water ?

The speed of sound in air is 330 m s-¹ 1. A motorcyclist travelling at a speed of 29 m s-¹ sounds the horn on their motorbike while passing a pedestrian beside the road. The rider hears the horn as a sound of frequency 250 Hz. a. What frequency does the pedestrian hear: i. when the motorcycle approaches? ii. when the motorcycle moves away? b. Explain why, when the motorcycle is right in front, the pedestrian hears the same frequency as the rider. D

What is the dynamic range of human ear?a. threshold of hearing (W/m2)b. threshold of pain (W/m2)c. SIL of threshold of hearing(dB)d. SIL of threshold of pain(dB)e. Sound intensity level of 200 dB

49. What will most likely happen to a ringing bell if placed inside a bell jar connected to a vacuum pump? A. The sound intensity will increase.B. The sound intensity will decrease.C. Frequency of the sound will decrease.D. The speed of sound will increase.

Q18 An Ethernet cable is 3.85 m long. The cable has a mass of 0.210 kg. A transverse pulse is produced by plucking one end of the taut cable. The pulse makes four trips down and back along the cable in 0.715 s. What is the tension in the cable?

The maximum energy of a vibrating mass is 3.00 x 10^-2 joules. The amplitude of oscillaiton is 2.50 mm with a frequency of 200 Hz. A. What is the mass of the object? B. What is the maximum acceleration of the object? C. If the mass affects the vibration frequency (like that of a mass and spring system), what should the mass be to double the maximum energy? Assume that the oscillation amplitude is not affected.

An ethernet cable is 3.90 m long and has a mass of 0.210 kg. A transverse pulse is produced by plucking one end of the taut cable. The pulse makes four trips down and back along the cable in 0.810 s. What is the tension in the cable?N

A.) The frequency of a vibrating bar is inversely proportional to the SQUARE of its length: f = constant/L2. I have two identical bars, except that one has a length of 36.8 cm and the other a length of 24.2 cm. What is the ratio of the vibrational frequency of the shorter bar to the longer bar? B.)A 0.8 meter length of string in mode number 2 vibrates with a frequency of 385 Hz. What is the velocity of the wave on the string

A piano wire of linear density 12 g/m has a length 2 m. It is stretched with a force of 7000N. A. What is the third harmonic of vibation of this wire? Draw a diagram. B. By what factor do you have to change the tension to get a fundamental mode at the same frequency.

At the pool, your friend’s watch beeps under the water. You hear a frequency of 1000 Hz from your spot on a beach chair. a. What is the wavelength of this sound in air? b. What is the frequency and wavelength of this sound wave under the water?