Question

Question 15 (12 marks) decide to test the acoustics of the cluff On a recent hike with a friend through hilly country, you around you. Looking at your map, directly morth of your position, you see a 250 m hi Buzard's Rest that is 177 m away. Looking due east, you see a 420 m Perch that is364 m away. Due west is an 83 m high bluff called Traveller's Stand that is470m away, and, due south is a 720 m ridge called Hawk's ye that is 893 m away The temperature at this time of the day is-25 C. From your isterests in drone flying and acoustics, you recall the formulas for the speed of sound in air and wave motion, and uing this know ledge you begin to determine the following escarpment called Oul's Papert v1 docx a) Write down the formula and determine the speed of sound in the air at this temmperature. b) Disregarding the echo from the other directions, if you face Buzzard's Rest and shout, how e) Similarly, if you face Owl's Perch, Traveller's Stand, and Hank's Eye, respectively, how 4) Which location will take the least amount of time for ybu to hear an echo? Explain in detail e) If the ambiest temperature was colder, say 10°C long will it take for you to hear the echo? long will it be until you hear an echo from each specific direction? why this is the case. (i) What would be the speed of sound in the air? (i) Would a temperature of 10°C make a difference to the time it takes for you to bear an echo in each direction? If there is a difference, what is the difference as a percestage? If there is no difference then why is this the case? Explain your reasoning and peovide 0) Which is the most critical factor(s): the geographical direction, the air temperature, the distance to the object which the sound is bouncing off, or the beight of the object which the sound is bouncing off? Or, alternatively, is there another parameter(s) that is even moee important?

Answer 1

ams (a) OH n 1s 213 Huu 331 mls us ร่ at a c at 25°. 273

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720m te énoud, 2 346 2x693 t 5./61 scconds 83m 4-10m de kmouw, t 2.71b seconds ammo takima as c comtantR

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