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SO — SoomaaliEN — English

Xawaaraha dhawaaqa

Cashar 3 / 5

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Natiijada casharka

I can measure the speed of sound waves in air using an echo method.

Muuji qoraalka
The ‘speed of sound’ is the distance travelled by a sound wave pulse every second, measured in m/s. Sound wave speed depends on the medium: it is about 340 m/s in air, faster in liquids and faster still in solids. Sound waves can reflect from hard surfaces, travel back and be heard again (an echo). The speed of sound waves (or the distance they travel) can be calculated using the equation: speed = distance ÷ time. In an experiment, measuring longer distances and times means any errors are a smaller proportion of the measurements.

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Imtixaannada

  1. 1. Miiska xawaaraha ee gaarigu wuxuu muujinayaa xawaar dhan 20 mayl saacaddii. Maxay tani macno u tahay?

    • Gaarigu wuxuu socday saacad oo wuxuu dhaafay masaafo dhan 20 mayl.
    • Jawaabta saxda ah:Haddii gaarigu sii socdo saacad xawaarahan, wuxuu dhaafi doonaa 20 mayl.
    • Haddii gaarigu sii socdo 20 saacadood xawaarahan, wuxuu dhaafi doonaa 20 mayl.
    • Gaarigu wuxuu socday 20 saacadood oo wuxuu dhaafay masaafo dhan hal mayl.

  2. 2. Mid ka mid ah kuwan soo socda ayaa qeexaya dhexdhexaadiyaha (medium) mowjadda (wave)?

    • Waa eray kale oo loo isticmaalo baaxadda (amplitude).
    • Jawaabta saxda ah:Waa walaxda uu mowjadda ku dhex safro.
    • Waa meesha dhexe ee u dhaxaysa cirifka sare (peak) iyo cirifka hoose (trough).
    • Waa masaafada u dhaxaysa hal cirif sare iyo kan ku xiga.

  3. 3. Mid ka mid ah kuwan soo socda ayaa qeexi kara dhaqdhaqaaqa walxaha (particles) ee mowjadaha codka (sound waves)?

    • Jawaabta saxda ah:gadaal iyo horay
    • horay
    • bidix iyo midig
    • dhanka midig
    • kor iyo hoos

  4. 4. Dhowr ka mid ah kuwan soo socda, dhawaqu wuxuu mari karaa kee?

    • meel faaruq ah (vacuum)
    • Jawaabta saxda ah:adke (solids)
    • dareere (liquids)
    • gaas (gases)

  5. 5. Waa kuwee qoraallada soo socda ee ku saabsan xawaaraha mowjadaha dhawaqa (sound waves) ee adkaha, dareeraha iyo gaasaska ay sax yihiin?

    • Waxay ka sareysaa dareeraha marka loo eego adkaha, sababtoo ah walxaha dareeraha ayaa si dhakhso leh u dhaqaaqa.
    • Jawaabta saxda ah:Waxay ka sareysaa dareeraha marka loo eego gaasaska, sababtoo ah walxaha dareeraha ayaa isku dhow.
    • Waxay ka sareysaa adkaha marka loo eego dareeraha, sababtoo ah soo jiidashada adkaha ayaa ka xoog badan.
    • Waxay ka sareysaa gaasaska marka loo eego dareeraha, sababtoo ah walxaha gaasaska ayaa xor u ah inay dhaqaaqaan.

  6. 6. Mid ka mid ah kuwan soo socda ayaa ah qeexida ugu fiican ee khaladaadka tijaabada (experimental errors)?

    • qorista cabbirada si khaldan
    • Jawaabta saxda ah:farqiga u dhexeeya qiimaha la cabiray iyo qiimaha saxda ah
    • siyaabaha habka tijaabada loo horumarin karo
    • khaladaadka uu sameeyo qofka tijaabada sameynaya marka uu tijaabada qaadayo

  1. 1. Kee ka mid ah weedhahan soo socda waa kuwa sax ah?

    • Dhammaan mowjadaha codka waxay isku xawli ku safraan.
    • Dhammaan mowjadaha codka waxay leeyihiin isku soo noqnoqosho (frequency).
    • Jawaabta saxda ah:Soo noqnoqoshada mowjada codka waxay saamaysaa heerka codka (pitch) ee la maqlo.
    • Soo noqnoqoshada mowjada codka waxay saamaysaa xawligeeda dhexdhexaad gaar ah.

  2. 2. Labada arday waxay isticmaalaan habka dhawaqa celiska (echo method) si ay u cabbiraan xawaaraha dhawaqa hawada. Jaantusku wuxuu muujinayaa habka loo diyaariyay. Goorma ayay tahay in ardaygu bilaabo oo joojiyo saacadda (timer)?

    • Bilaab marka blocks-ku isku dhacaan; jooji marka dhawaqu ku dhaco derbiga.
    • Jawaabta saxda ah:Bilaab marka blocks-ku isku dhacaan; jooji markay maqlaan dhawaqa marka labaad.
    • Bilaab marka dhawaqu ku dhaco derbiga; jooji markay maqlaan dhawaqa marka labaad.

  3. 3. Nidaamka sonar ee markabka ayaa soo dira mowjad dhawaq ah waxaana soo celinaya dhawaq (echo) 1.20 ilbidhiqsi ka dib. Intee ayay u jirtaa shayga, haddii xawaaraha dhawaqa biyuhu yihiin 1500 m/s?

    • 625 m
    • Jawaabta saxda ah:900 m
    • 1250 m
    • 1800 m

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