1. What is the speed of a sound wave in air at 300°K? What is the speed in helium at the same temperature? Can you explain why a person who has inhaled helium speaks with a high-pitched voice (do not try this yourself)? 2. Find the Mach number of an airplane traveling at 2000 f t/s at altitudes of 5000 f t, 10, 000 f t, 20, 000 f t, and 30, 000 f t. Assume a standard atmosphere (Table Appendix-C.6).

1. What is the speed of a sound wave in air at 300°K? What is the speed in helium at the same temperature? Can you explain why a person who has inhaled helium speaks with a high-pitched voice (do not try this yourself)? 2. Find the Mach number of an airplane traveling at 2000 f t/s at altitudes of 5000 f t, 10, 000 f t, 20, 000 f t, and 30, 000 f t. Assume a standard atmosphere (Table Appendix-C.6).

Similar questions

QUESTION 40 Which of these expressions yields the speed of sound in air in SI units if the air temperature is 114 degrees Celsius? a. 331.5 + 0.607 + 114 b. 331.5 + 0.607 times 114
2. Suppose the intensity of sound of a jet during takeoff is 100 watts/m². What is the corresponding sound intensity in decibels? How much more intense is this sound than the least audible sound a human can hear? 3. A 1-liter solution contains 10-8 moles of hydrogen ions. Determine whether the solution is acidic, neutral, or basic.
please quickly thanks ! You have two mono-frequency sound sources. If you set one frequency as 600Hz, and sweep another frequency from 597Hz to 603Hz, what will happen to the sound intensity you measure? A.It varies, and the interval of this variation will gradually become shorter before half of the sweeping time, then gradually longer in the rest time. B.It varies, and the interval of this variation will gradually become shorter. C.It doesn't change at all. D.It varies, and the interval of this variation will gradually become longer
30 m from an ultrasonic sensor. The total travel time of the ultrasonic wave is 33 ms (milliseconds). What is the speed of sound in these conditions?
What is the frequency of a wave which has a period of57500 s?2.A.0.00001386 HzD.0.00001908 HzB.0.00001739 HzE.0.00001775 HzC.0.00002115 HzF.0.00001999 Hz
5. A quantum object travels directly toward you at a constant rate while producing a sound with a singular frequency of 440 Hz. While you stand still, the object passes through you and continues Moving (you are uninjured). You measure an overall shift in the frequency you hear to be 25.0 Hz. Assume is it 20.0 °C during this shift. a) What is the speed of this particle? b) After is passes through you, you notice that your wallet is missing and see it attached to this particle. You begin accelerating toward the particle at a constant rate of 1.50 m/s² via ion propelled roller shoes. At what time do you perceive a frequency of 435 Hz? c) You stop accelerating when you perceive a frequency of 435 Hz and continue to travel at a constant rate at which time the particle then instantaneously reverses it path to return your wallet, traveling back toward you at its same constant rate which it initially had. What frequency do you then perceive at it travels toward you?
Determine the intensity of a 119-dB sound. The intensity of the reference level required to determine the sound level is 1.0×10−12W/m2. A. Express your answer to two significant figures and include the appropriate units. B. Determine the intensity of a 21-dBsound. Express your answer to two significant figures and include the appropriate units.
Step 1: Write down the equation needed to solve for velocity Velocity = Wavelength x Frequency Step 2: Place the known measurements into the equation Step 3: Solve the equation. Carefully put the numbers into your calculator. Recheck your answers! It is very easy to hit the wrong button on your calculator. Use correct SI units-Answer A sound wave travels 2.462 km in 8.73 s. What is the velocity of the sound?
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 highest frequency sound humans can hear is about 20,000 HzHz. 1. What is the wavelength of sound in air at this frequency? 2. What is the wavelength of the lowest sounds we can hear, about 20 HzHz?
1. A car is blowing its horn (f = 285Hz) while driving away from you at 18.0m/s. The air temperature is -12.0°C. a) What frequency do you hear? b) How fast would the car have to drive, and in what direction, for you to hear a frequency of 356Hz?
10 B. Suppose that you put your left ear down against a railroad track, and your friend one kilometer away strikes the track with a hammer. a). How much sooner will the sound get to your left ear than to your right ear? (The speed of sound is about 5950 m/s in steel and 340 m/s in air.) b). Draw a sketch to support your results and include given information, formulas and calculations. Your answer