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Satellite: Kwa nini isibaki angani?

Discussion in 'Tech, Gadgets & Science Forum' started by JAYJAY, Sep 23, 2011.

  1. JAYJAY

    JAYJAY JF-Expert Member

    #1
    Sep 23, 2011
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    Kuna habari kuwa kuna satellite iliyozeeka ya Marekani ambayo inatarajiwa kuanguka kurudi huku duniani kwa mujibu wa NASA. Wanasema saizi yake ni kama basi ambapo inategemewa itaweza kuunguka wakati ikiingia kwenye anga la dunia na baadhi ya vipande vyake vitaanguka ingawa haitegemewi kudhuru watu.

    Naomba kueleweshwa, ni kwa nini wao(NASA) wanategemea kuwa itaungua. Swali lingine, kwa kuwa huko kwenye anga za juu huwa wanasema kuwa hakuna gravitational force, hivyo vitu huwa vinaelea tu kwenye anga bila kuanguka kuja huku chini, sasa kwa nini satellite hiyo isibaki huko huko juu? Ni kitu gani kinaivuta kurudi huku duniani?
     
  2. Dio

    Dio JF-Expert Member

    #2
    Sep 23, 2011
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    Mkuu mimi sıo mtaalam sana wa mambo hayo ıla soon watakuja wataalam
     
  3. Likwanda

    Likwanda JF-Expert Member

    #3
    Sep 23, 2011
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    Dah, Physics Kwangu Ilikuwa Mwiba Sana, Lakini Swali Taamu Sana, tuwasikilize wataalam watavyosema.
     
  4. Bujibuji

    Bujibuji JF-Expert Member

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    Sep 23, 2011
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    sayansi wakati mwingine inadanganya. Haina kumbukumbu nzuri jana ilituambia nini
     
  5. elmagnifico

    elmagnifico JF-Expert Member

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    Sep 23, 2011
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    In the end, all human-made satellites will
    fall back to Earth, since objects eventually
    lose velocity and are overcome by the
    EarthÂ’s gravity. It may take a very long time
    for this to happen, however, because
    satellites are so high in space. Satellites near
    the Earth in low- Earth orbit may take 10, 20,
    or 100 years to fall back to Earth. Satellites
    higher up in highly-elliptical or geostationary
    orbits may take hundreds, thousands, or
    even million of years to fall back to Earth.
    Objects falling back to Earth will burn up in
    the atmosphere due to the friction caused by
    the EarthÂ’s atmosphere.
     
  6. Gurta

    Gurta JF-Expert Member

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    Sep 23, 2011
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    Asante elmagnifico
     
  7. Azimio Jipya

    Azimio Jipya JF-Expert Member

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    Nafikiri wengine wameshajibu ...lakini niongezee kidogo kuwa gravitational force iko huko angani wakati wote ... na mwendo wa satellite kwenye orbit yake ni mjumuisho wa gravity, uzito wa chombo hicho na umbali toka duniani. Kuiweka satellite kwenye mzunguko wake unahitaji kuwepo kwa nguvu ya mvutano wa dunia ili izunguke dunia. Kama ikiwa nje ya mvutano wa gravity ya dunia ... itavutwa na sayari (escape velocity) au chochote kingine karibu chenye gravity yake... EITHER kikazunguke huko au kuangukia huko!! Kwa hiyo kunahitajika ujuzi wa kweli kabis kufanya chombo kuzunguka sayari fulani na isiwe sayari nyingine ..au chochote kingine!!
     
  8. LIKE Niku ADD

    LIKE Niku ADD JF-Expert Member

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    nkisoma uzi huu nawaza amos 5 dah!
     
  9. g

    gibasisi Senior Member

    #9
    Nov 24, 2015
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    Natamani amos5 ianguke maeneo ya kwetu ili nipate kiPande cha solar maana nasikia huwa ni high voltage yaweza kuniondolea masaibu ya tanesco
     
  10. bizzle for shizzle

    bizzle for shizzle JF-Expert Member

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    Kweli JF ni darasa tosha tuna shukuru kwa elimu nzuri ya uzi huu umenifurahisha sana yani sana.
     
  11. JAYJAY

    JAYJAY JF-Expert Member

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    Nov 24, 2015
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    Dah! Huu uzi niliuanzisha kitambo!
     
  12. Vicent daudi

    Vicent daudi JF-Expert Member

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    Jamani ufafanuzi zaidi wengi hatuijui zaidi ya jina
     
  13. M

    MaxMase JF-Expert Member

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    Nov 24, 2015
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    Soma Facebook pages za continental na ting utaona wanahama kutoka huko sijui wanaenda satellite gani. Kazi balaa
     
  14. Nazjaz

    Nazjaz JF-Expert Member

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    since 2011 hadi Leo haijaanguka tu, basis bujibuji kaongea ukweli
     
  15. Maarko

    Maarko JF-Expert Member

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    Hivi dunia inazunguka hizo satellite na zenyewe zina zunguka au zimetulia sehemu moja?
    Na kama imetulia sehemu moja inawezaje kufanya kazi muda wote?
     
  16. uyui kwetu

    uyui kwetu JF-Expert Member

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    Nov 24, 2015
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    Naomba kujifunza mengi kuhusu satellite
     
  17. NullPointer

    NullPointer JF-Expert Member

    #17
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    Gravitation force ipo ulimwengu mzima, doesn't matter uko mbali ya sayari kiasi gani, sema unavozidi kua mbali ndivyo inavozidi kua ndogo, kwa hiyo kwenye satellite pia gravitation force ipo, satellite inavutana na dunia na bado inavutana na objects nyingine zote kwenye universe.

    Satellite iliyopo angani siku zote hua inaanguka, ukiona satellite ambayo ipo sehemu moja kila siku usidhani kua ipo imesimama, pale hua inaanguka sema inaanguka kwa speed sawa na speed ya mzunguko wa dunia kwa hiyo inakua inaangukia upande kila siku.

    Satellite kama hii unayosikia inakuja kuanguka duniani ni sababu imepoteza speed, manake centripetal force (nguvu inayovuta satellite towards earth) imezidi force inayolizungusha.

    Natumaini umeelewa, kueleza kiswahili haya mambo hua ni mbinde, elimu ya ngeli hii noma sana.
     
  18. Mu-sir

    Mu-sir JF-Expert Member

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    kwa mujibu wa knowledge ndogo niliyonayo Sattelite huwa zina kuwa Designed to explode/Self destruct wakati life span yake inapoisha. Nilijifunza kuwa life span ya Sattellite huwa ni minimum of 15 years. Huwa kuna fuel tanks zinawekwa kwa satellite ili kuirun inapokuwa kule. hii ni Gesi ya hdrogen kama sijasahau then the solar powe is supplement.

    Kwa hiyo ile fuel inapoisha huwa life ya Satellite inakuw inaelekea kuisha kwani not always Solar power ni sufficient ku generate required energy.
    Kwa hiyo huwa kuna vilipuzi ambavyo huilipua auyomatically na mabaki yake huangukia duniani most hayadhuru binadamu.

    Ni muda mrefu kidogo when I learnt this kama kuna michango zaidi tujifunze wote
     
  19. Clajago

    Clajago Member

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    Nov 25, 2015
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    Hii inanikumbusha enzi zile za Mir Space Station
     
  20. 1

    1954tanu JF-Expert Member

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    Nov 25, 2015
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    Umri wa setelaiti ni miaka 15 kwa zile ambazo hurushwa juu zaidi ya kilometa 36,000 toka uso wa dunia. Kwa zile ambazo hulizunguka jua kwenye umbali huo huwa na umri wa miaka 12.

    Kitu gani huifanya setelaiti ifikie ukomo wa umri? Setelaiti zina kifaa kiitwacho propellant (fueli) ambacho huifanya setelaiti ibaki kwenye orbiti yake. Kifaa hiki hufa wakati vifaa vingine vingali vinafanya kazi.

    Setelaiti zile za umbali mkubwa zinapofikia ukomo wa umri husogezwa mbali zaidi toka uso wa dunia; huenda hata 2000 km. Eneo hilo huitwa kaburi la setelaiti (satellite graveyard). Aidha, setelaiti nyingi hulipuka zinapofika huko. Vipande vya setelaiti iliyolipuka huweza kuleta madhara makubwa kwa setelaiti nzima. Hivyo, husogezwa mbali ili ikalipukie huko.

    Setelaiti zinazozunguka dunia chini ya umbali wa km 36,000 zinapokufa hulipuka zikidondoka. Na kila mwaka takribani setelaiti 12 hufa na huondoka katika orbiti zake.

    Mbona hatuoni zikidondoka? Zile zizungukazo umbali wa zaidi ya km 36,000 hupelekwa kwenye kaburi la satelaiti. Hata zikilipuka na kusambalatika, ili mabaki yake yafike kwenye uso wa dunia huchukua miaka na miaka. Huweza kuchukua kuanzia karne moja hadi milenium moja.

    Kwa setelaiti za chini. Hizi zinapolipuka vipande vyake huweza kuchukua miaka 25 au zaidi kufika duniani. Na mara zote vipande hivyo havijaleta madhara yoyote hadi sasa kwa hapa duniani. Vipande vingi vimekuwa vikidondoka katika uso wa dunia.
     
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