Speed of Sound
Speed of Sound kan jedhamu kuni "speed" "sound wave"iin wanna yokan (medium) Elastic ta'e kessa demuni. Gossa wanna kessa darbu irratti hunda'e "speed" kuni gargara jirra (Fakkena "sound wave"iin qillensa kessa calla bishanii kessa bayye faggo demma). Kana qoffa osoo hin ta'in garagarruman kuni fakki "medium" sunni irrattille ni hunda'a (fakkena Temprature). Maqqan kuni bayyinan "sound wave" qillensaffi fayyadatama. "Sea Level"itti, temprature 21°C (70 °F) fi atmosferra sirritti (normalitti) "speed" kuni 344 m/s (769 mph or 1238 km/h) dha.
Maqaan sound velocity(v) fi sound speed(c) kan yerro guddo walli wajjin fayyadamani maqaa Sound Particle Velocity(v) wajjin gargarri bafachunni barbachissa dha. Sound particle velocityiin "velocity particle"(yokan "velocity" wantotta diddiqo waan adunya hundaa kessatti argamanitti).
Gossa atmosferra irratti hunda'e "speed" kuni gargarri jirra. Kan kessa immo kan bayye "speed" jijjiru "tempraturadha". Dhibaan qillensa "speed" "soundii" irratti jijjirama homma hiin fiddu. Ideal gas irratti dhibaan qillensa jijjirama homma fidu hin danda'u. Kunis sababa dhibaan kunif "density"iin qillensa jijjirama wal-qixxe ta'e waan fidanuffi. Kanaffu "ideal gas" kessatti "density" fi "dhiban" walli ballessu. Kunni immo jijjirami sababa "tempraturra" qofaan akka dhufu sababa ta'a. Tempraturra gudda kessatti "speed of sound"iin gudda dha. Fagganne gara olii yoo demnu "speed of sound"iin hirdhacha dhuffa kunis sababa yoo ollii demnu tempraturii waan hirdhacha dhufuffi. Haa ta'u malee olii demne yoo Stratosphere dhaqabnu temprecherii ni darrata kunis sababa ho'a Ozone Layeriif, kanafu "speed of sound"illen ni darratta. 
Jidhii (Humidity)iin jijjirami "speed of sound" irratti qabu diqqa haa ta'u malee lakka'amu ni danda'a. "Speed of sound"iin qillensa jidha kessatti percentii 0.1%-0.6% hirdhatta.
Tilmammi "speed of sound"ii halla qillensa jidha hinqabne fi temprecherri 0 °Cfi dhihoo ta'e kessatti meters per second (m·s-1)iin "formula" kanan argamu ni danda'amma.
where formula_2 is the temperature in degrees Celsius (°C).
"Formula"n kuni kan dhufee "formula" Taylor Expansion term lamman dura irratti. "Formula"n Taylor immo kan fakkatta:-
Lakkofsii 331.3 m/s kuni "speed" temprature 0 °C yoo ta'u, lakkofsi kuni guddinan "theory"iin kan argame fi hanga ta'een immo lakka'amme argame yoo ta'u kan itti hunda'e immo specific heat ratio,formula_4. Yoo "ideal gas"iin formula_4 tilmamee 7/5 = 1.4000 ta'a jedhame, speed temprecheraa 0 °C argammu 331.3 m/sec ta'a (lakkofsi kuni immo lakkofsa formula irratti fayyadame dha). Haa ta'u malle speed temprature 0 °C kan "ideal gas" hunda 331.2 hanga 331.6 ta'a.
"Formula"n kuni "range" temprecherra bayye kessatti ni hojjatta, haa ta'u malle Heat Capacityiin kuni akka temprecherra irra ofii danda'etti yoo fudhatame. "Formula"n kuni immo temprecherra guggudatti hin hojjattu. Haa ta'u malle "formula"n kuni tilmamma garri kan kennu yerro qillensi goggoga, qabana'a fi dhibaa qillensa diqaa qabattu dha. Fakkenafi Stratospheretti.