3 and 4 A * TEA 57% 1 6:49 PM3. Someone is speeding on the road at 89 mph (39.8. m/sec). A police car is coming from oppositedirection at 95 mph (42.5 m/s) with a siren frequency of 1200 Hz. Find the frequency heard by thedriver. Take the speed of sound at 20C as 343 m/sec.а. 1189 Hzb. 1528 Hzс. 1192 Hzd. 1211 Hz4. The linear density of a violin string is 7.8 x 10* kg/m. A wave on the string has a frequency of 440Hz and a wavelength of 65 cm. Find the tension on the string.a. 0.22 Nb. 63.8 Nc. 0.036 Nd. 6.38 x 10° N5. A pipe with one end open and one end closed produces a fifth harmonic frequency of 1760 Hz at 20degree C. Find the length of the pipe.а. 14.7 стb. 29.3 стc. 48.7 cmd. 24.4 cm6. An infinitely long wire has a charge density of 2.7 x 10° C/m. Find the electric field 5.00 m awayfrom the wire.a. 0.97 N/Cb. 9.71 N/Cc. 4.86 N/Cd. 1.94 N/C

“Since you have asked multiple questions, we will solve the first question (Question number 3) for…

3. Someone is speeding on the road at 89 mph (39.8 m/sec). A police car is coming from opposite direction at 95 mph (42.5 m/s) with a siren frequency of 1200 Hz. Find the frequency heard by the driver. Take the speed of sound at 20C as 343 m/sec. a. 1189 Hz b. 1528 Hz c. 1192 Hz d. 1211 Hz

3. Someone is speeding on the road at 89 mph (39.8 m/sec). A police car is coming from opposite direction at 95 mph (42.5 m/s) with a siren frequency of 1200 Hz. Find the frequency heard by the driver. Take the speed of sound at 20C as 343 m/sec. a. 1189 Hz b. 1528 Hz c. 1192 Hz d. 1211 Hz

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter17: Sound Waves

Section: Chapter Questions

Problem 17.3OQ: As you travel down the highway in your car, an ambulance approaches you from the rear at a high...

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A driver travels northbound on a highway at a speed of 25.0 m/s. A police car, traveling southbound at a speed of 40.0 m/s, approaches with its siren producing sound at a frequency of 2 500 Hz. (a) What frequency does the driver observe as the police car approaches? (b) What frequency does the driver detect after the police car passes him? (c) Repeat parts (a) and (b) for the case when the police car is behind the driver and travels northbound.
A physicist a1 a fireworks display times the lag between seeing an explosion and hearing its sound, and finds it to be 0.400 s. (a) How far away is the explosion if air temperature is 24.0°C and if you neglect the time taken for light to reach the physicist? (b) Calculate the distance to the explosion taking the speed of light into account. Note that this distance is negligibly greater.
A driver travels northbound on a highway at a speed of 25.0 m/s. A police car. traveling southbound at a speed of 40.0 m/s. approaches with its siren producing sound at a frequency of 2 500 Hz. (a) What frequency does the driver observe as the police car approaches? (b) What frequency does the driver detect after the police car passes him? (c) Repeat parts (a) and (b) for the case when the police car is behind the driver and travels northbound.
(a) What frequency is received by a person watching an oncoming ambulance moving at 110 km/h and emitting a steady 800—Hz sound from its siren? The speed of sound on this day is 345 m/s. (b) What frequency does she receive after the ambulance has passed?
(a) What is the speed of sound in a medium where a 100kHz frequency produces a 5.96cm wavelength? (b) Which substance in Table 17.1 is this likely to be?
A commuter train blows its 200Hz horn as it approaches a crossing. The speed at sound is 335 m/s. (a) An observer waiting at the crossing receives a frequency of 208 Hz. What is the speed of the train? (b) What frequency does the observer receive as the train moves away?
A tuning fork is known to vibrate with frequency 262 Hz. When it is sounded along with a mandolin siring, four beats are heard every second. Next, a bit of tape is put onto each line of the tuning fork, and the tuning fork now produces five beats per second with the same mandolin siring. What is the frequency of the string? (a) 257 Hz (b) 258 Hz (c) 262 Hz (d) 266 Hz (e) 267 Hz
A yellow submarine traveling horizontally at 11.0 m/s uses sonar with a frequency of 5.27 103 Hz. A red submarine is in front of the yellow submarine and moving 3.00 m/s relative to the water in the same direction. A crewman in the red submarine observes sound waves (pings) from the yellow submarine. Take the speed of sound in seawater as 1 533 m/s. (a) Write Equation 14.12. (b) Which submarine is the source of the sound? (c) Which submarine carries the observer? (d) Does the motion of the observers submarine increase or decrease the time between the pressure maxima of the incoming sound waves? How does that affect the observed period? The observed frequency? (e) Should the sign of v0 be positive or negative? (f) Does the motion of the source submarine increase or decrease the time observed between the pressure maxima? How does this motion affect the observed period? The observed frequency? (g) What sign should be chosen for vs? (h) Substitute the appropriate numbers and obtain the frequency observed by the crewman on the red submarine.
As you travel down the highway in your car, an ambulance approaches you from the rear at a high speed (Fig. OQ17.3) sounding its siren at a frequency of 500 Hz. Which statement is correct? (a) You hear a frequency less than 500 Hz. (b) You hear a frequency equal to 500 Hz. (c) You hear a frequency greater than 500 Hz. (d) You hear a frequency greater than 500 Hz. whereas the ambulance driver hears a frequency lower than 500 Hz. (e) You hear a frequency less than 500 Hz. whereas (he ambulance driver hears a frequency of 500 Hz.
(a) What is the speed of sound in a medium where a 100-kHz frequency produces a 5.96-cm wavelength? (b) Which substance in Table 17.1 is this likely to be?
(a) What is the intensity in watts per meter squared of a just barely audible ZUD—Hz sound? (b) What is the intensity in watts per meter squared of a barely audible 4000—Hz sound?
A dolphin (Fig. P17.7) in seawater at a temperature of 25C emits a sound wave directed toward the ocean floor 150 m below. How much time passes before it hears an echo?