Imibuzo yesibonelo sokulinganisa

Izibonelo eziyi-12 zemibuzo yokulinganisa

1. Imiphumela yokulinganisa ububanzi bemabula kusetshenziswa i-screw micrometer, okuboniswe esithombeni esingezansi, nquma ubukhulu bobubanzi bemabula!
A. 4,78 mmIsibonelo sokulinganisa umbuzo 1
B. 5,28 mm
C. 5,70 mm
D. 8,50 mm
E. 9,28 mm
Ingxoxo
I-screw micrometer isebenzisa amayunithi e-millimeter futhi isikali sayo esincane kunazo zonke singamamilimitha angu-0,01.
Isikali esiyinhloko = amamilimitha angu-4,5
Isikali esijikelezayo = 27,5 x 0,01 millimeters = 0,275 millimeters
Umphumela wokulinganisa = 4,5 millimeters + 0,275 millimeters = 4,775 millimeters = 4,78 millimeters
Impendulo efanele ngu-A.

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Umkhiqizo we-Dot usebenzisa izingxenye ze-vector zeyunithi

Izinto Zokuphindaphinda Amachashazi Ezisebenzisa Izingxenye Zevektha Yeyunithi

Singabala umkhiqizo we-scalar ngqo uma sazi izingxenye ze-x, y kanye ne-z zama-vectors u-A no -B (ama-vectors aziwayo).

Ukuze senze umkhiqizo wechashazi ngale ndlela, siqala ngokwenza umkhiqizo wechashazi wamavektha eyunithi, ngemva kwalokho siveza amavektha u-A no -B ezingxenyeni zawo, sihlukanise umkhiqizo bese sisebenzisa umkhiqizo wamavektha eyunithi.

Amavekhtha eyunithi u-i , u-j, no -k aqondene, okwenza izibalo zibe lula. Sisebenzisa i-scalar multiplication equation etholakala ngenhla ( AB = AB cos theta ), sithola:

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Umkhiqizo oxubile usebenzisa izingxenye ze-vector zeyunithi

Izinto Zokuphindaphinda Ezihlanganisiwe Ezisebenzisa Izingxenye Ze-Unit Vector

Singabala umkhiqizo ophambene ngqo uma sazi izingxenye zamavektha. Inqubo iyafana nomkhiqizo wechashazi . Okokuqala, siphindaphinda amavektha eyunithi u-i , u-j , no -k . Umkhiqizo wevektha phakathi kwamavektha eyunithi efanayo ungu-zero.

i x i = j x j = k x k = 0

Ngokubhekisela ku-equation yokuphindaphinda kwevektha etholakale ngaphambilini (A x B = AB Isono θ) kanye nempahla evimbela ukuguquguquka kwe- ukuphindaphinda kwevektha (A x B = - B x A), bese sithola:

i x j = -j x i = k

j x k = -k x j = i

k x i = – i x k = j

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Ivektha yeyunithi

Ukuqonda Ama-Unit Vectors 

Ivektha yeyunithi iyivektha enobukhulu obungu-1. Ivektha yeyunithi ayinawo amayunithi futhi isebenza ukukhombisa isiqondiso esikhaleni. Ukuze ihlukaniswe nevektha evamile, inyatheliswa ngokugqamile (ngombhalo ophrintiwe) noma kufakwe uphawu lwe-^ ngaphezu kwayo (ngokubhala ngesandla).

Kuhlelo lwe-Cartesian coordinate (xyz) sisebenzisa i-unit vector u-i ukukhombisa isiqondiso se-x-axis esihle, u-j ukukhombisa isiqondiso se-y-axis esihle, u-k ukukhombisa isiqondiso se-y-axis esihle.

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Ukuphindaphinda okuphambene

Umkhiqizo ohlanganisiwe wamavektha amabili, isibonelo amavektha u-A no -B, ubhalwa njengo- A x B ( A ohlanganisiwe u -B ). Umkhiqizo ohlanganisiwe ubizwa ngokuthi umkhiqizo wevektha ngoba umphumela walokhu kuphindaphindwa ukhiqiza inani levektha.

Isibonelo, i-vector A kanye ne-vector B zibukeka njengesithombe esingezansi.

Ukuphindaphinda okuphambene 1Ukuchaza umkhiqizo ohlanganisayo phakathi kwama-vector A dan B (A x B), sidweba i-vector A dan B njengoba kuboniswe esithombeni esingenhla, futhi kuboniswe izingxenye zevektha U-B uqonde ngqo ku-A, okulingana no-B sin theta.

Ngakho-ke, singachaza ubukhulu bomkhiqizo ohlanganisiwe wama-vector. A dan B (A x B) njengomkhiqizo wobukhulu be-vector A ngezingxenye zevektha B iqonde ngqo ku-vector A.

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Umkhiqizo we-Dot

Ama-vector awazona izinombolo ezijwayelekile, ngakho-ke ukuphindaphinda okuvamile akukwazi ukusetshenziswa ngqo kuwo. Kumelwe sisebenzise ukuphindaphinda kwe-vector. Kunezinhlobo ezimbili zokuphindaphinda kwe-vector: ukuphindaphinda kwamachashazi kanye nokuphindaphinda okuphambene. Ukuphindaphinda kwamachashazi kubizwa nangokuthi ukuphindaphinda kwe-scalar ngoba kukhiqiza inani le-scalar. Ukuphindaphinda okuphambene kubizwa nangokuthi ukuphindaphinda kwe-vector ngoba kukhiqiza inani le-vector. Isibonelo, kunezinhlobo ezimbili ze-vector, okungukuthi A dan B. Ukuphindaphindwa kwama-vector e-Scalar A dan B kusho ukuthi AB KNjengoba inkundla isebenzisa ukubhalwa kwamachashazi, lokhu kuphindaphinda kubizwa ngokuthi umkhiqizo wamachashazi. Ukuphindaphinda kwevektha A dan B kusho ukuthi A x BNgoba isebenzisa amanothi x, khona-ke lokhu kuphindaphinda kubizwa ngokuthi ukuphindaphinda okuphambene.

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Imibuzo yokudlulisa ukushisa

Imibuzo emi-3 yokudlulisa ukushisa

1. Bheka isithombe esilandelayo!

Uma amapayipi amathathu efakwa ebhokisini lengilazi elivaliwe njengoba kuboniswe esithombeni. Intuthu evela kumqulu wephepha ibekwa ekugcineni kwepayipi B bese ingena ngepayipi, khona-ke intuthu izophuma futhi ngamapayipi A no-C njengoba kuboniswe esithombeni. Lesi senzakalo senzeka ngenxa yokudluliselwa kokushisa yi….

A. i-convectionUmbuzo 1 wokudlulisa ukushisa

B. ukuqhutshwa

C. ukuqaliswa

imisebe ye-D.

Ingxoxo

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