Isayensi

Izibonelo eziyi-12 zamagagasi ashintshashintshayo

1. Isibalo segagasi eliphambene elisakazeka ku-string ngu-y = 3 sin π (120 t – 0,4 x). Uma u-x no-y beku-cm kanti u-t kungemizuzwana, khona-ke ubude be-wavelength bungu- ….
A. 1 cm
B. 2 cm
C. 3 cm
D. 4 cm
E. 5 cm

Funda kabanzi

Izilinganiso noma izibalo ku-physics zisukela kosayizi bezinhlayiya ezincane kakhulu, njengobunzima be-electron, kuya kobukhulu obukhulu kakhulu, njengobunzima bomhlaba. Ukubhala imiphumela yezilinganiso zezinto ezinkulu kakhulu, isibonelo ubunzima bomhlaba bungaba ngu-6,000,000,000,000,000,000,000,000 kg noma imiphumela yezilinganiso zezinhlayiya ezincane kakhulu, isibonelo ubunzima be-electron bungaba ngu-0,000,000,000,000,000,000,000,000,000,000,000,000,000.911 kg idinga isikhala esikhulu futhi ivame ukubhalwa ngokungalungile. Ukuze sinqobe le nkinga, singasebenzisa i-notation yesayensi.

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Ukuhlaziywa kobukhulu ku-physics kungasetshenziswa ukuhlola ukunemba kokutholwa kwe-equation. Ekuhlaziyweni kobukhulu, kuphela amanani angokoqobo anezilinganiso ezifanayo angangezwa, asuswe, noma alinganiswe. Uma amanani angokoqobo anezilinganiso ezifanayo noma ezahlukene ephindaphindwa, ahlukaniswe, noma akhushulwe abe amandla, ubukhulu balawo manani nabo buphindaphindwa, buhlukaniswe, noma bukhushulwe bube amandla.

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Izibonelo ezi-5 zoMthetho kaBernoulli

I-1 P₁ dan v₁ ukucindezela kanye nesivinini somoya ngaphezu kwephiko, P₂ dan v₂ ukucindezela kanye nesivinini somoya ngaphansi kwephiko. Ukuze indiza isuke, izimo...
A. P₁ =P₂ dan v₁ = v₂
B. P₁ < P₂ dan v₁ > v₂
C.P₁ < P₂ dan v₁ < v₂
D.P₁ > P₂ dan v₁ > v₂
E.P₁ > P₂ dan v₁ < v₂
Ingxoxo:

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Izibonelo Eziyi-8 Zezibalo Ezibalulekile

1. Ubude bentambo elinganiswe ngumfundi bungu-0,20350 m. Inani lezibalo ezibalulekile ekulinganisweni…
A. ezimbili
B. ezintathu
C. ezine
D. ezinhlanu
E. isithupha

Ingxoxo:
Impendulo efanele ingu-D. Izibalo ezibalulekile zingu-2, 0, 3, 5, 0. Inombolo engu-0 phambi kwephuzu ledesimali ayiyona inombolo ebalulekile.

Funda kabanzi

Esinye sezimpawu ezibalulekile zento ubuningi, okubizwa nangokuthi ukuminyananya. Igama elipholile yi-density. Ubuningi buyisilinganiso sobuningi nomthamo wento ethile. Ngokwezibalo, kubhaliwe:
ρ = m/V
(ρ funda “rho”) uhlamvu lwesiGreki oluvame ukusetshenziswa ukuveza ubuningi, u-m uwubunzima kanti u-V uwuvolumu.
Uhlelo lwamayunithi lwamazwe ngamazwe ukuminyana amakhilogremu ngemitha eyi-cubic (kg/m2)³). Kumayunithi e-CGS, okungukuthi amasentimitha, amagremu, namasekhondi, iyunithi yobuningi ivezwa ngamagremu ngesentimitha ngayinye (gr/cm³).

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Wake wazibuza ukuthi, Kungani izinto eziqinile zintanta phezu kwamanzi? Ufaka i-cork emanzini bese i-cork iyantanta. Ngakolunye uhlangothi, uma ufaka inalithi yokuthunga noma itshe emanzini, inalithi yokuthunga noma itshe izocwila, noma ngabe ubukhulu belinalithi noma itshe buncane kune-cork. Yiziphi izinto ezibangela into eqinile ukuba intante phezu kwamanzi?

Amandla adonsela phansi omhlaba asebenza kuyo yonke into ebusweni bomhlaba, ngakho-ke yonke into enobunzima inamandla adonsela phansi. Uma amandla esisindo (w) sento eqinile emancane kune -booyancy force (F _A ) yamanzi, khona-ke lapho into eqinile icwiliswa emanzini, into iyakhuphuka futhi intante phezu kwamanzi.

Funda kabanzi

Wake wazibuza ukuthi kungani kubanda kakhulu esiqongweni sentaba? Iziqongo zezintaba noma izindawo eziphakeme zivame ukubanda kunomoya ezindaweni eziphansi noma eduze kolwandle. Uma indawo iphakeme ngaphezu kolwandle, kubanda kakhulu lapho. Umoya ongaphezulu kwentaba kufanele ufudumale ngoba useduze nelanga. Kungani kubanda kakhulu esiqongweni sentaba?

Ngokomthetho kaNewton wamandla adonsela phansi , ubukhulu bamandla adonsela phansi oMhlaba endaweni bulingana ngokuphambene nesikwele sebanga eliphakathi kwesikhungo soMhlaba naleyo ndawo. Ngakho-ke lapho indawo ikude nesikhungo soMhlaba, kulapho amandla adonsela phansi oMhlaba emancane khona kuleyo ndawo. Ngamanye amazwi, lapho indawo iphakeme ngaphezu kolwandle, kulapho amandla adonsela phansi oMhlaba emancane khona kuleyo ndawo. Ngakho amandla adonsela phansi oMhlaba endaweni eseduze nolwandle noma ezindaweni eziphansi makhulu kunamandla adonsela phansi oMhlaba ethafeni noma esiqongweni sentaba.

Funda kabanzi

Yenza lokhu kuhlola okulandelayo.

Lengisa isisindo ku-dynamometer bese uqopha isisindo esikhonjiswe yi-dynamometer. Okulandelayo, beka isisindo emanzini bese uqopha isisindo esikhonjiswe yi-dynamometer.

Qhathanisa izilinganiso zakho. Ingabe isisindo sikhulu uma sisemanzini noma uma singekho emanzini? Kungani? Xoxa ngemiphumela yalolu cwaningo nomlingani wakho.

Funda kabanzi

Amandla avamile amandla asebenza ezintweni ezithintanayo, lapho isiqondiso samandla siqonde ngqo endizeni yokuxhumana. Uphawu lwawo yi-N kanti uhlelo lwamazwe ngamazwe lwamayunithi yi-kg m/s ² noma i-Newton.

Phoqa u-N endaweni eyisicaba

U-N ungamandla asetshenziswa yiphansi emshayweni, u-N' ungamandla asetshenziswa ngumshayweni ophansi. u-w ungamandla adonsela phansi asebenza emshayweni noma isisindo somshayweni. U-N no-N' bangamandla okusabela kwesenzo, kuyilapho u-N no-w bengewona amandla okusabela kwesenzo.

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