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Ultrasound

Cashar 4 / 5

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I can describe what ultrasound is and explain its properties, and also describe some uses of ultrasound.

Muuji qoraalka
Sound waves of frequency below 20 Hz usually cannot be heard by humans, so are called infrasound. Sound waves of frequency above 20 000 Hz usually cannot be heard by humans, so are called ultrasound. Ultrasound waves can cause objects to vibrate, so transfer energy. They do not cause harm to the human body. Ultrasound can be used to image structures inside the body as it reflects from boundaries between tissues. Ultrasound vibrations can clean delicate objects and can help to treat injuries and illnesses in physiotherapy.

Warqadda shaqada

weli lama diyaarin

Imtixaannada

  1. 1. Waa kuwee kuwan soo socda kuwa ay gudbiyaan mawjadda dhawaaqa (sound wave)?

    • Jawaabta saxda ah:tamarta (energy)
    • walxaha (particles)
    • gariirka (vibrations)

  2. 2. Marka uu shay u oggolaado mowjadda (wave) inay dhex marto, waxaan nidhaahnaa shaygaasi __________ mowjadda.

    • gudbiyaa (transfers)
    • beddelaa (transforms)
    • Jawaabta saxda ah:dhex mariyaa (transmits)
    • qaadaa (transports)

  3. 3. Mid ka mid ah kuwan soo socda waa inta jeer ee mowjadu (wave) ku dhacdo ilbidhiqsi?

    • Jawaabta saxda ah:tirada garaacyada ee ilbidhiqsi kasta
    • waqtiga loo qaato hal garaac
    • tirada garaacyada ee mitir kasta
    • dhererka hal garaac

  4. 4. Mid ka mid ah kuwan soo socda ayaa ah halbeega (unit) ee inta jeer ee (frequency)?

    • Jawaabta saxda ah:Hz
    • J
    • m
    • Pa
    • s

  5. 5. Kee ka mid ah weedhahan soo socda ee ku saabsan mowjadaha ultrasound-ka (ultrasound waves) ayaa sax ah?

    • Mowjadaha ultrasound-ku waxay leeyihiin inta jeer (frequency) la mid ah mowjadaha dhawaaqa.
    • Mowjadaha ultrasound-ku waxay leeyihiin inta jeer (frequency) ka hooseeya mowjadaha dhawaaqa.
    • Jawaabta saxda ah:Mowjadaha ultrasound-ku waxay leeyihiin inta jeer (frequency) ka sareeya mowjadaha dhawaaqa.

  1. 1. Ultrasound waxaa loola jeedaa mowjadaha codka (sound waves) ee leh soo noqnoqosho (frequencies) ka sarreeya…

    • 20 Hz
    • 200 Hz
    • 2000 Hz
    • Jawaabta saxda ah:20 000 Hz
    • 200 000 Hz

  2. 2. Intee ka mid ah alaabtan soo socota ayaa mowjadaha ultrasound-ku mari karaan? hawada, biyaha, unugyada jilicsan ee jidhka.

    • eber
    • hal
    • laba
    • Jawaabta saxda ah:saddex

  3. 3. Mid ka mid ah kuwan soo socda ayaa sharxaya sababta aadanuhu u maqli karin ultrasound-ka (ultrasound)?

    • Mowjadaha ultrasound-ku waxay dillaaciyaan dhegta (eardrum).
    • Mowjadaha ultrasound-ku ma geli karaan dhuunta dhegta (ear canal).
    • Jawaabta saxda ah:Qaybaha dhegta aadanaha ma gariiri karaan si degdeg ah oo ku filan.
    • Maskaxdu ma aqoonsan karto calaamadaha neerfaha ee ultrasound-ku keeno.

  4. 4. Mid ka mid ah kuwan soo socda ayaa kordhiya heerka wareejinta tamarta ee mowjadda dhawaaqa ama mowjadda ultrasound-ka?

    • hoos u dhigista codka (pitch)
    • Jawaabta saxda ah:kordhinta baaxadda (amplitude)
    • kordhinta inta jeer ee mowjadda (frequency)

  5. 5. Mid ka mid ah kuwan soo socda ayaa sharxaya sida ultrasound ugu faa'iideysan karo daweynta jirka (physiotherapy)?

    • Waxaa loo isticmaali karaa in lagu qaboojiyo unugyada jidhka.
    • Jawaabta saxda ah:Waxaa loo isticmaali karaa in lagu diiriyo unugyada jidhka.
    • Waxaa loo isticmaali karaa in lagu ogaado jajabka lafaha.
    • Waxaa loo isticmaali karaa in lagu arko gudaha unugyada jidhka.

  6. 6. Maxaa ka mid ah weedhahan soo socda oo sharxaya sababta loo isticmaali karo ultrasound (dhawaq sare) in lagu eego gudaha jidhka bini'aadamka?

    • Waxay leedahay saameyn kulayl (heating effect).
    • Jawaabta saxda ah:Waxay dhex martaa unugyada jidhka (human tissue).
    • Waxay kordhisaa socodka dhiigga ee unugyada jidhka.
    • Waxay ka soo booddaa (reflects off) xuduudaha u dhexeeya unugyo kala duwan.

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