Video: Lub davhlau ya nyob twg tshaj tawm mus txog li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Terminal tshaj tawm yog ua tiav , yog li ntawd, thaum qhov ceev ntawm ib qho khoom txav tsis nce lossis txo qis; cov khoom acceleration (los yog deceleration) yog xoom. Ntawm terminal ceev , huab cua tsis kam sib npaug hauv qhov hnyav ntawm qhov khoom poob.
Tsis tas li lo lus nug yog, qhov ntsuas qhov ntsuas hluav taws xob ntsuas li cas?
Rau xam lub davhlau ya nyob twg tshaj tawm , pib los ntawm kev muab qhov loj ntawm qhov khoom los ntawm 2. Tom qab ntawd, muab tus lej ntawd los ntawm qhov nrawm ntawm qhov khoom vim lub ntiajteb txawj nqus thiab sau koj cov lus teb. Tom ntej no, muab qhov ntom ntom ntawm cov kua dej uas cov khoom poob los ntawm qhov projected cheeb tsam ntawm cov khoom.
Tsis tas li ntawd, qhov siab ntawm lub davhlau ya nyob twg mus txog qhov siab? A: Ib lub jumper davhlau ya nyob twg ceev paub tias nyob ib ncig ntawm 120 mph kis-eagle thiab nyob ib ncig ntawm 160 mph ko taw ua ntej.
Kuj tseem paub yog, vim li cas cov khoom ncav cuag qhov nrawm nrawm?
Lub zog ntawm lub ntiajteb txawj nqus ua rau ib qho khoom , ua rau nws nrawm mus rau lub ntiaj teb. Raws li nws yog ceev nce lub zog rub (kev sib txhuam) tawm ntawm nws los ntawm huab cua nce. Thaum ob lub zog ntawm lub khoom balances, nws mus txog ib qho tsis tu ncua ceev.
Terminal Velocity ceev yog dab tsi?
Nyob ruaj khov, plab-rau-lub ntiaj teb txoj hauj lwm, terminal ceev yog 200 km/h (120 mph). Stable freefall taub hau down txoj hauj lwm muaj ib davhlau ya nyob twg ceev 240-290 km / h (kwv yees 150-180 mph). Ntxiv minimization ntawm luag los ntawm streamlining lub cev tso cai rau ceev nyob ze ntawm 500 km / h (310 mph).
Pom zoo:
Dab tsi yog qhov davhlau ya nyob twg tshaj tawm ntawm skydiver?
Txog 200 km / h
Dab tsi yog lub zog rub ntawm lub davhlau ya nyob twg?
Nws tshwm sim thaum qhov sib npaug ntawm lub zog rub (Fd) thiab qhov buoyancy sib npaug rau qhov downwardforce ntawm lub ntiajteb txawj nqus (FG) ua rau ntawm qhov khoom. Influid dynamics, ib yam khoom yog txav ntawm nws lub davhlau ya nyob twg tshaj tawm yog tias nws qhov ceev tsis tu ncua vim qhov txwv quab yuam los ntawm cov kua los ntawm qhov nws txav mus
Tus nqi ntawm lub davhlau ya nyob twg yog dab tsi?
Raws li cov cua tsis kam, piv txwv li, lub davhlau ya nyob twg ceev ntawm lub skydiver nyob rau hauv lub plab-rau-lub ntiaj teb (piv txwv li, fim down) free caij nplooj zeeg txoj hauj lwm yog hais txog 195 km / h (120 mph; 54 m / s)
Yuav ua li cas koj pom qhov nruab nrab tshaj tawm ntawm qhov tshaj tawm vs lub sijhawm teeb?
Qhov chaw nyob hauv qab qhov nrawm / lub sijhawm nkhaus yog tag nrho cov kev hloov pauv. Yog tias koj faib qhov ntawd los ntawm kev hloov pauv hauv lub sijhawm, koj yuav tau txais qhov nruab nrab tshaj tawm. Velocity yog vector daim ntawv ntawm kev ceev. Yog tias qhov nrawm ib txwm tsis yog qhov tsis zoo, ces qhov nruab nrab tshaj tawm thiab qhov nruab nrab ceev yog tib yam
Lub zog rau kev thauj mus los ntawm qhov twg thiab vim li cas thiaj li xav tau lub zog rau kev thauj mus los?
Kev thauj mus los nquag yog txheej txheem uas yuav tsum tau txav cov molecules tawm tsam qhov concentration gradient. Cov txheej txheem yuav tsum muaj zog. Lub zog rau cov txheej txheem tau txais los ntawm kev rhuav tshem cov piam thaj siv oxygen hauv kev ua pa aerobic. ATP yog tsim thaum ua pa thiab tso tawm lub zog rau kev thauj mus los