2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib qho yooj yim pendulum muaj ib tug loj dai los ntawm ib tug ze ze ntawm massless hlua uas swings txog ib tug pivot. Gravitational muaj peev xwm zog (GPE) yog tus zog vim txoj hauj lwm uas sib npaug rau mgh qhov twg h yog qhov siab sib txawv ntawm nws txoj hauj lwm qis tshaj plaws mus rau qhov twg nws tau tsiv mus rau.
Ib yam li ib tug yuav nug, puas yog lub pendulum muaj peev xwm muaj zog?
Tag nrho cov zog hauv pendulum yog gravitational muaj peev xwm zog thiab tsis muaj kinetic zog . Ntawm qhov qis tshaj (Point D) lub pendulum muaj nws qhov ceev tshaj plaws. Tag nrho cov zog hauv pendulum yog kinetic zog thiab tsis muaj gravitational muaj peev xwm zog.
Tsis tas li ntawd, lub zog hloov pauv hauv lub pendulum yog dab tsi? Raws li ib tug pendulum swings, nws muaj peev xwm zog hloov mus rau kinetic thiab rov qab mus rau qhov muaj peev xwm. Nco qab lub tswvyim ntawm kev txuag ntawm zog - tias zog muaj hloov nws daim ntawv, tab sis tsis muaj net hloov mus rau tus nqi ntawm zog.
Tsis tas li ntawd, qhov twg lub pendulum muaj lub zog tshaj plaws?
Yog kinetic zog yog siab tshaj hauv qab ntawm lub pendulum , ces yog qhov twg muaj peev xwm zog yog qhov qis tshaj. Yog li muaj peev xwm zog yuav yog siab tshaj thaum lub pendulum yog ntawm nws siab tshaj taw tes rau ntawm ob sab ntawm nws cov lus tsa suab uas nws nyob ruaj khov rau ib qho instant.
Thaum lub pendulum swings thaum twg yog lub peev xwm lub zog loj tshaj?
Yog li ntawd, a swinging pendulum muaj nws loj tshaj kinetic zog thiab tsawg kawg muaj peev xwm zog nyob rau hauv txoj hauj lwm ntsug, nyob rau hauv uas nws ceev yog loj tshaj thiab nws qhov siab tsawg kawg nkaus; nws muaj qhov tsawg kawg nkaus kinetic zog thiab lub zog loj tshaj plaws ntawm lub extremities ntawm nws viav vias , nyob rau hauv uas nws ceev yog xoom thiab nws qhov siab yog loj tshaj.
Pom zoo:
Dab tsi yog qhov txawv ntawm electrostatic muaj peev xwm thiab electrostatic muaj peev xwm zog?
Tsis muaj qhov sib txawv ntawm electrostatic potentialenergy thiab hluav taws xob (al) muaj peev xwm zog. Lub peev xwm hluav taws xob ntawm ib qho taw tes yog kev ua haujlwm los ntawm lwm qhov kev quab yuam hauv kev txav chav tsev zoo los ntawm ib qho arbitrarilychosen xoom ntawm lub peev xwm (feem ntau infinity) mus rau lub ntsiab lus
Puas muaj peev xwm hluav taws xob thiab lub zog muaj peev xwm tib yam Vim li cas lossis vim li cas ho tsis?
Lub zog muaj peev xwm hluav taws xob Ue yog lub zog muaj peev xwm khaws cia thaum cov nqi tawm ntawm qhov sib npaug (xws li lub zog muaj peev xwm gravitational). Lub peev xwm hluav taws xob zoo ib yam, tab sis ib tus nqi, Ueq. Ib qho hluav taws xob muaj peev xwm sib txawv ntawm ob lub ntsiab lus hu ua voltage, V = Ue2q−Ue1q
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua
Dab tsi yog cov qauv ntawm lub zog nyob rau hauv lub peev xwm thiab lub zog kinetic?
Lub zog muaj peev xwm yog khaws cia lub zog thiab lub zog ntawm txoj haujlwm - lub zog gravitational. Muaj ntau hom kev muaj peev xwm muaj zog. Kinetic zog yog kev txav - ntawm nthwv dej, electrons, atoms, molecules, tshuaj, thiab khoom. Chemical Zog yog lub zog khaws cia hauv cov khoom sib txuas ntawm atoms thiab molecules
Puas muaj peev xwm equilibrium zoo ib yam li so muaj peev xwm?
Qhov sib txawv ntawm daim nyias nyias muaj peev xwm thiab qhov muaj peev xwm sib npaug (-142 mV) sawv cev rau lub zog hluav taws xob hluav taws xob uas tsav Na + mus rau hauv lub xovtooj ntawm lub peev xwm so membrane. Thaum so, txawm li cas los xij, qhov permeability ntawm daim nyias nyias mus rau Na + tsawg heev kom tsuas yog me me Na + xau rau hauv lub cell