Video: Vim li cas 45 degrees yog qhov siab tshaj plaws?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Phau ntawv qhia hais tias ntau tshaj plaws rau projectile motion (tsis muaj cua tsis kam) yog 45 degrees . Lub ntsiab txhais yog qhov kev txav ntawm ib yam khoom vim tsuas yog lub zog gravitational (tsis muaj cua tsis kam, foob pob hluav taws lossis khoom).
Hauv qhov no, vim li cas 45 degrees yog lub kaum sab xis zoo?
Yog vim li cas 45 degrees yog cov zoo tshaj plaws tso tawm lub kaum sab xis (ua rau lub davhlau ntev tshaj plaws) yog tias nws zoo kawg nkaus faib lub zog nce thiab nce mus. cuaj caum qib yog ncaj. Zero qib yog ncaj nraim rau pem hauv ntej. 45 degrees yog nyob nruab nrab, ib nrab ntawm 90.
Ib tug kuj yuav nug, thaum twg qhov ntau ntawm qhov projectile siab tshaj? Cov ntau tshaj plaws yuav yog thaum cov khoom ntawm kab rov tav thiab ntsug ntawm qhov nrawm yog siab kawg - qhov no tshwm sim thaum lawv ob leeg sib npaug, thiab qhov ntawd sib haum mus rau lub kaum sab xis ntawm 45 degrees. Ua qhov point ntawm siab kawg qhov siab a projectile motion bisect lub ntau ntawm projectile tsab ntawv tsa suab?
Tsis tas li ntawd, vim li cas lub projectile mus deb tshaj ntawm 45 degrees?
A projectile , nyob rau hauv lwm yam lus, travels lub nyob deb tshaj thaum nws yog launched ntawm lub kaum sab xis ntawm 45 degrees . Raws li tau hais los saum toj no, sine muaj nuj nqi nce mus txog nws qhov txiaj ntsig loj tshaj plaws, 1, nrog rau lub kaum sab xis ntawm 90. qib , yog li peb tuaj yeem pom tias rau lub ntuj-siab punt θ = 90.
Lub kaum sab xis cuam tshuam li cas?
Lub tso tawm lub kaum sab xis txiav txim siab qhov siab tshaj plaws, lub sijhawm nyob hauv huab cua, thiab qhov siab tshaj plaws kab rov tav nyob deb ntawm qhov projectile.
Pom zoo:
Dab tsi yog rau qhov sib txawv loj ntawm lub koom haum los ntawm qhov tsawg tshaj plaws mus rau loj tshaj plaws ecologists?
Lub koom haum loj yog dab tsi, los ntawm qhov tsawg tshaj plaws mus rau qhov loj, uas cov kws tshawb fawb feem ntau kawm? 6 theem sib txawv ntawm lub koom haum uas ecologists nquag kawm yog hom, pejxeem, zej zog, ecosystem, thiab biome
Qhov siab tshaj plaws thiab qhov tsawg kawg nkaus hauv lej yog dab tsi?
Hauv kev ua lej, qhov siab tshaj plaws thiab qhov tsawg kawg nkaus ntawm qhov muaj nuj nqi yog qhov loj tshaj plaws thiab qhov tsawg tshaj plaws uas qhov kev ua haujlwm yuav siv ntawm ib qho chaw. Yam tsawg kawg txhais tau tias qhov tsawg tshaj plaws koj tuaj yeem ua tau ib yam dab tsi
Qhov twg electromagnetic yoj muaj qhov luv tshaj wavelength thiab siab tshaj plaws zaus?
Gamma rays muaj lub zog siab tshaj plaws, qhov luv tshaj wavelengths, thiab cov zaus siab tshaj plaws. Cov xov tooj cua tsis muaj zog, ntawm qhov tod tes, muaj lub zog qis tshaj plaws, qhov ntev tshaj plaws wavelengths, thiab qis tshaj zaus ntawm txhua hom EM hluav taws xob
Dab tsi yog qhov yuam kev loj tshaj plaws yog tias Irina ntsuas qhov ntev ntawm nws lub qhov rais li 3.35 feet qhov yuam kev loj tshaj plaws yog taw?
Kev daws: Qhov yuam kev loj tshaj plaws hauv kev ntsuas ntsuas tau txhais tias yog ib nrab ntawm qhov ntsuas ntsuas
Dab tsi yog qhov siab tshaj plaws ntawm qhov poob siab tso cai rau hauv av xaim?
NEC pom zoo tias qhov siab tshaj plaws ua ke voltage poob rau ob qho tib si feeder thiab ceg Circuit Court yuav tsum tsis txhob ntau tshaj 5%, thiab qhov siab tshaj plaws ntawm lub feeder lossis ceg Circuit Court yuav tsum tsis txhob ntau tshaj 3% (Fig. 1). Qhov kev pom zoo no yog qhov teeb meem kev ua haujlwm, tsis yog teeb meem kev nyab xeeb