Ubuningi namayunithi atholiwe - izinkinga nezixazululo
1.
Ngokusekelwe kuthebula elingenhla, nquma inani elitholiwe kanye namayunithi awo aphesheya.
Isixazululo
Ubuningi
Isibalo sobuningi yi-ρ = m / V
m = isisindo (iyunithi yayo yamazwe ngamazwe yi-kilogram, i-kilogram efingqiwe)
V = ivolumu (iyunithi yayo yamazwe ngamazwe iyimitha eyi-cubic, efingqiwe m 3 )
ρ = ubuningi (iyunithi yayo yamazwe ngamazwe ingamakhilogramu ngemitha eyi-cubic, efingqiwe kg/ m3 )
Force
Isibalo samandla yi-F = ma
m = isisindo (iyunithi yayo yamazwe ngamazwe yi-kilogram, i-kilogram efingqiwe)
a = ukusheshisa (iyunithi yayo yamazwe ngamazwe ingamamitha ngomzuzwana isikwele, isifinyezo m/s 2 )
F = amandla (iyunithi yayo yamazwe ngamazwe ingama-kilogram amamitha ngomzuzwana isikwele, isifinyezo kg m/s 2 )
Velocity
Isilinganiso sejubane ngu-v = s/t
s = ibanga (iyunithi yayo yamazwe ngamazwe iyimitha, efingqiwe m)
t = isikhathi (iyunithi yayo yamazwe ngamazwe ingeyesibili, efingqiwe ngokuthi s)
v = ijubane (iyunithi yayo yamazwe ngamazwe ingamamitha ngomzuzwana, efingqiwe m/s)
Indawo
Isibalo sendawo yi-A = lxl
l = ubude (iyunithi yayo yamazwe ngamazwe iyimitha, efingqiwe m)
A = indawo (iyunithi yayo yamazwe ngamazwe iyimitha eyisikwele, efingqiwe m 2 )
Temperature
Izinga lokushisa liyinani eliyisisekelo. Uphawu lokushisa yi-T kanti iyunithi yalo yomhlaba wonke yi-Kelvin, okufingqiwe ngokuthi i-K.
Ubuningi obutholiwe kanye namayunithi abo aphesheya kwezilwandle kuboniswa ngezinombolo (1), (2), kanye (3).
2.
Inani elitholiwe kanye namayunithi alo aphesheya liboniswa ngenombolo……
Isixazululo
(1) Umthamo: inani elitholiwe
(2) Ugesi wamanje : inani lesisekelo
(3) Ubukhulu bokukhanya: inani eliyisisekelo
(4) I-voltage kagesi : inani elitholakalayo
(5) Ingcindezi : inani elitholakalayo
Ubuningi obutholiwe kanye namayunithi abo aphesheya kwezilwandle kuboniswa ngezinombolo (1), (4), kanye (5)
1. Umbuzo: Yini ehlukanisa inani elithathwe enanini eliyisisekelo noma eliyisisekelo?
Impendulo: Inani elitholiwe lakhiwa kusetshenziswa inhlanganisela yamanani ayisisekelo ngokuphindaphinda noma ukuhlukanisa, kuyilapho inani eliyisisekelo liyisisekelo futhi alikwazi ukutholakala kwamanye amanani.
2. Umbuzo: Yiliphi inani elitholwe elilinganiswa ngama-Joules (J)?
Impendulo: Ama-Joules alinganisa amandla, umsebenzi, noma inani lokushisa.
3. Umbuzo: Iyunithi esuselwe yejubane ivezwa kanjani ngokweziyunithi eziyisisekelo?
Impendulo: Ijubane, elilinganiswa ngamamitha ngomzuzwana (m/s), litholakala ebangeni (amamitha) elihlukaniswe ngesikhathi (imizuzwana).
4. Umbuzo: Yiliphi iyunithi elithathwe elimele ivolumu?
Impendulo: Iyunithi etholakalayo yevolumu yi-cubic meter (m³).
5. Umbuzo: Iyini iyunithi yemvamisa, futhi ihlobene kanjani nesikhathi?
Impendulo: Iyunithi yemvamisa yiHertz (Hz). Imelela imijikelezo ngomzuzwana futhi iyisikhathi esihambisanayo.
6. Umbuzo: Silinganisa amandla kagesi ngayiphi iyunithi?
Impendulo: Amandla kagesi alinganiswa ngama-Farads (F).
7. Umbuzo: Yiliphi inani elitholwe elimelelwa yiyunithi iPascal (Pa)?
Impendulo: I-Pascal (Pa) imele ingcindezi, okuyi-force ngeyunithi ngayinye.
8. Umbuzo: Iyunithi yokusheshisa, amamitha ngomzuzwana isikwele (m/s²), itholakala kanjani?
Impendulo: Ukusheshisa izinga lokushintsha kwejubane. Ngakho-ke, kutholakala ekuhlukaniseni ijubane (m/s) ngesikhathi (s), okuholela ku-m/s².
9. Umbuzo: Yiliphi inani elitholakalayo elichazwa yiyunithi iKelvin nge-Watt (K/W)?
Impendulo: I-K/W ichaza ukumelana nokushisa.
10. Umbuzo: Yiliphi iyunithi elisuselwe esetshenziswa ukukala i-magnetic flux?
Impendulo: Ukujikeleza kwamagnetic kulinganiswa ngama-Webers (Wb).
11. Umbuzo: Iyunithi etholakala ku-Ohm (Ω) ihlobene kanjani nogesi kanye nomehluko ongase ube khona?
Impendulo: I-Ohm iyiyunithi yokumelana kagesi. Imelela ukumelana kwisekethe lapho umehluko ongaba khona we-Volt eyodwa ukhiqiza ugesi we-Ampere eyodwa.
12. Umbuzo: Ngokuphathelene namayunithi ayisisekelo, i-Watt (W) itholakala kanjani?
Impendulo: I-Watt imelela amandla, okungamandla ngeyunithi yesikhathi. Itholakala njenge-Joules (amandla) ehlukaniswe ngamasekhondi (isikhathi), okuholela ku-kg x m²/s³.
13. Umbuzo: Iyini iyunithi etholakala ku-inductance?
Impendulo: Iyunithi esuselwe ku-inductance yi-Henry (H).
14. Umbuzo: Iyunithi ethathwe ku-Newton (N) ihlobene kanjani nobukhulu kanye nokusheshisa?
Impendulo: I-Newton imele amandla. Itholakala ku-mass (amakhilogremu) aphindaphindwa ngokusheshisa (m/s²).
15. Umbuzo: Iyunithi ethathwe ku-Candela (cd) ilinganisa ini?
Impendulo: I-Candela ilinganisa ukuqina kokukhanya ngendlela ethile.
16. Umbuzo: Iyunithi yomfutho itholakala kanjani?
Impendulo: Umfutho utholakala ngokuphindaphinda isisindo (kg) ngejubane (m/s), okuholela ku-kg xm/s.
17. Umbuzo: Yiliphi iyunithi elithathwe ungalisebenzisa ukukala inani lezinto eziku-moles ngevolumu ngayinye?
Impendulo: Ukuhlushwa kwento esixazululweni kuvame ukulinganiswa ngama-moles nge-cubic meter (mol/m³).
18. Umbuzo: Yiliphi iyunithi elisuselwe esetshenziswa ukukala umehluko wamandla kagesi?
Impendulo: Umehluko wamandla kagesi ulinganiswa ngama-Volts (V).
19. Umbuzo: Yiliphi inani elimelelwa yiyunithi ethathwe ku-Becquerel (Bq)?
Impendulo: I-Becquerel imele i-radioactivity. Ngokukhethekile, iyisilinganiso sezinga lokubola kwezinto ezinemisebe, okubonisa ukubola okukodwa ngomzuzwana.
20. Umbuzo: Iyunithi etholakala ku-torque, i-Newton meter (N·m), ihluke kanjani kuyunithi yamandla, i-Joule?
Impendulo: Nakuba womabili anamayunithi ayisisekelo afanayo (kg x m²/s²), amelela imiqondo ehlukene yomzimba. I-N·m imelela i-torque, okuyi-rotation force, kuyilapho i-Joule imelela amandla noma umsebenzi owenziwe.
