14. What is the speed of sound in air at a temperature of 30.0 oC?     331.5 m/s     20.0 m/s     350 m/s     225 m/s     124 m/s

Calculate the speed of sound in air when the temperature is 16°C. m/s v = 332 m/s + |0.59 t °C

5. A jogger runs at 9 m/s, and is trailed by a bumblebee moving at 5 m/s and emitting a frequency of 270 Hz. What frequency does the jogger hear if the speed of sound in air was 336 m/s? V=V Soos = S source (V 1 V 205) f=f Source S = ? V= 11

The sound level at a distance d=34 m from a loudspeaker is 70 dB. What is the power (in Watt) at which sound energy is being produced by the loudspeaker?. The threshold of hearing, lo = 1*10-12 W/m2, A. 0.5265 B. 0.3812 C. 0.1453 D. None E. 0.5812

4. A bystander hears a siren vary in frequency from 592 Hz to 380 Hz as a fire truck approaches, passes by, and moves away on a straight street. What is the speed of the truck? (Take the speed of sound in air to be 343 m/s.) m/s @ 2 W S X command # 3 E D C $ 4 R F G Search or type URL % 5 V.. T G MacBook Pro 6 B Y H & 7 N U 00+ J 8 - M 1332 j ( 9 0 K .C O L command P V - *** : 2 t { option [ ? 12

5. What is the intensity of a sound that has an intensity level of 95 dB? ssfoc s W/m2 ssf60 ssk 60 ssf60 sst ssf60 ssf60 09 0 ssfoo

3. A bystander hears a siren vary in frequency from 598 Hz to 364 Hz as a fire truck approaches, passes by, and moves away on a straight street. What is the speed of the truck? (Take the speed of sound in air to be 343 m/s.) m/s f60 ss f60 s ssfo ssf60 s

There is a tube of length 1.0 m with one end closed. You clapped your hand at the mouth of the tube once. The echo of the clap came back after 6.0 milliseconds. What is the velocity of sound in the tube ? 330 m/s O 320 m/s 290 m/s O 170 m/s

11. An ultrasonic flow meter for measuring flow rate in a square channel uses two transducers that are placed at x = 0.5 m (Transducer 1) and x = 1.7 m (Transducer 2). x is measured along the length of the channel. The width of the channel is 0.2 m. The speed of sound through this medium is 1500 m/s and the flow rate is 0.4 m3/s Find the transit time (in us) of the wave from Transducer 1 to 2 and from Transducer 2 to 1 (in us)

10. The speed of sound in air is 343.2 m/s at 20 °C. You design experiments using three different types of techniques and equipment to measure the speed of sound yourself. You collect the following sets of experimental data (four measurements, or trials, for each of your three techniques). Which trial provides good precision but poor accuracy? a. trial 1: 346 m/s, 356 m/s, 334 m/s, 329 m/s b. trial 2: 374 m/s, 373 m/s, 371 m/s, 373 m/s c. trial 3: 345 m/s, 344 m/s, 342 m/s, 341 m/s d. trial 1: 313 m/s, 333 m/s, 353 m/s, 363 m/s e. more than one of the above provides precision but not accuracy