Video: Qhov unit ntawm ib joule yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Zog
Ua li no, dab tsi yog SI units ntawm joule?
Joule . Joule , chav tsev ntawm kev ua haujlwm lossis lub zog hauv International System ntawm Chav tsev ( SI ); nws yog sib npaug rau cov hauj lwm ua los ntawm ib tug quab yuam ntawm ib tug newton ua los ntawm ib 'meter'. Lub npe hu ua English physicist James Prescott Joule ,ua 107 ergs, lossis kwv yees li 0.7377 ko taw-phaus.
Ib yam li ntawd, tus qauv ntawm Joule yog dab tsi?
| Ib tus tuaj yeem suav cov haujlwm ua los ntawm lub dav hlau los ntawm kev siv qhov sib npaug: W = F x D Piv txwv li, yog tias lub dav hlau qauv siv 0.25 Newtons tshaj qhov deb ntawm 10 meters, lub dav hlau yuav siv 2.5 Joules. | |
|---|---|
| Ua haujlwm | = F x D |
| = 0.25 * 10 | |
| = 2.5 J |
Ua raws li qhov kev pom no, chav tsev twg yog kg / m2 s2?
SI Derived thiab SI Compatible Units
| Derived Unit | Kev ntsuas | Lus Txhais |
|---|---|---|
| Newton (N) | zog | kg · m-2 |
| Pascal (Pa) | siab | kg · m-1·s-2 |
| joule (J) | zog los yog ua hauj lwm | kg · m2·s-2 |
| watt (W) | zog | kg · m2·s-3 |
Dab tsi yog joule?
Ib joule ua txhais tau tias yog tus nqi ntawm lub zog exerted thaum lub zog ntawm ib tug newton yog siv tshaj ib tug 'meter'. Ib joule ua yog qhov sib npaug ntawm ib watt ntawm lub hwj chim radiated los yog dissipated rau ib tug thib ob. Hauv qee qhov kev siv, British thermal unit (Btu) yog siv los qhia lub zog.
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