12 mau laʻana o nā nalu transverse
1. ʻO ke kaulike o kahi nalu transverse e pālahalaha ana ma ke kaula he y = 3 sin π (120 t - 0,4 x). Inā ʻo x a me y ma kenimika a ʻo t ma kekona, a laila ʻo ka nalu he ….
A. 1 kenimika
B. 2 kenimika
C. 3 kenimika
D. 4 kenimika
E. 5 kenimika
ʻO nā ana a i ʻole nā helu ʻana i ka physics mai nā nui liʻiliʻi loa o nā ʻāpana, e like me ke kaumaha o kahi electron, a i nā nui nui loa, e like me ke kaumaha o ka honua. Ke kākau ʻana i nā hopena o nā ana o nā mea nui loa, no ka laʻana, ʻo ke kaumaha o ka honua ma kahi o 6,000,000,000,000,000,000,000,000,000 kg a i ʻole nā hopena o nā ana o nā ʻāpana liʻiliʻi loa, no ka laʻana, ʻo ke kaumaha o kahi electron ma kahi o 0,000,000,000,000,000,000,000,000,000,000,000,000.911 kg pono kahi ākea nui a kākau pinepine ʻia me ka hewa. No ka lanakila ʻana i kēia pilikia, hiki iā mākou ke hoʻohana hōʻailona ʻepekema.
Kānāwai nā ana kino hiki ke hoʻohana ʻia e nānā i ka pololei o ka loaʻa ʻana o nā kaulike. I ka hana ʻana i ka loiloi dimensional, hiki ke hoʻohui ʻia, unuhi ʻia, a hoʻohālikelike ʻia paha nā nui kino me nā ana like. Inā hoʻonui ʻia, māhele ʻia, a hoʻokiʻekiʻe ʻia paha nā nui kino me nā ana like a ʻokoʻa paha i kahi mana, hoʻonui ʻia, māhele ʻia, a hoʻokiʻekiʻe ʻia paha nā ana o kēlā mau nui i kahi mana.
5 mau laʻana o ke kānāwai o Bernoulli
1 P1 a hiki v1 ʻo ia ke kaomi a me ka wikiwiki o ka ea ma luna o ka ʻēheu, P2 a hiki v2 ʻo ia ke kaomi a me ka wikiwiki o ka ea ma lalo o ka ʻēheu. No ka lele ʻana o kahi mokulele, ʻo nā kūlana...
A.P.1 = P2 a hiki v1 = v2
B.P1 <P2 a hiki v1 > v2
ʻO C. P1 <P2 a hiki v1 < v2
D.P.1 > P2 a hiki v1 > v2
E.P.1 > P2 a hiki v1 < v2
Kūkākūkā:
8 mau laʻana o nā helu koʻikoʻi
1. ʻO ka lōʻihi o ke kaula i ana ʻia e kekahi haumāna he 0,20350 m. ʻO ka helu o nā helu koʻikoʻi i ke ana ʻana he…
A. ʻelua
B. ʻekolu
C. ʻehā
D. ʻelima
E. ʻeono
Kūkākūkā:
ʻO ka pane pololei ʻo D. ʻO nā helu koʻikoʻi he 2, 0, 3, 5, 0. ʻAʻole he helu koʻikoʻi ka helu 0 ma mua o ke kiko decimal.
ʻO kekahi o nā waiwai koʻikoʻi o kahi mea, ʻo ia ka density, ʻo ia hoʻi ka nui o ka paʻanya. ʻO ka huaʻōlelo anuanu ʻo ia ka density. ʻO ka density ka lakio o ka nuipa i ka nui o kahi mea. Ma ke ʻano makemakika, ua kākau ʻia:
ρ = m/V
ʻO (ρ heluhelu ʻia ʻo "rho") kahi leka Helene i hoʻohana pinepine ʻia no ka hōʻike ʻana i ka nuipaʻa, ʻo m ka nuipaʻa a ʻo V ka nui.
ʻŌnaehana honua o nā ʻāpana ka nui o ka paʻa he kilokani no ka mika cubic (kg/m3No nā anakahi CGS, ʻo ia hoʻi nā kenimika, nā grama, a me nā kekona, ua hōʻike ʻia ke anakahi density ma nā grama no ke kenimika cubic (gr/cm3).
Ua nīnau paha ʻoe, No ke aha e lana ai nā mea paʻa ma luna o ka wai? Hoʻokomo ʻoe i ke kopa i loko o ka wai a lana ke kopa. Ma ka ʻaoʻao ʻē aʻe, inā hoʻokomo ʻoe i kahi nila humuhumu a i ʻole ka pōhaku i loko o ka wai, e piholo ke nila humuhumu a i ʻole ka pōhaku, ʻoiai ʻoi aku ka liʻiliʻi o ka nui o ke nila a i ʻole ka pōhaku ma mua o ke kopa. He aha nā kumu e hoʻoulu ai i kahi Hiki i nā mea paʻa ke lana ma luna o ka wai ?
Hana ka ikaika umekaumaha o ka honua ma luna o kēlā me kēia mea ma luna o ka ʻili o ka honua, no laila, he ikaika umekaumaha ko kēlā me kēia mea me ke kaumaha. Inā emi ka umekaumaha (w) o kahi mea paʻa ma mua o lana (FA) ka wai a laila ke hoʻokomo ʻia kahi mea paʻa i loko o ka wai, neʻe ka mea i luna a lana ma luna o ka wai.
Ua noʻonoʻo paha ʻoe no ke aha i ʻoi aku ai ke anuanu ma ka piko o ka mauna? ʻOi aku ka anuanu o nā piko o nā mauna a i ʻole nā kiʻekiʻe ma mua o ka ea ma nā ʻāina haʻahaʻa a kokoke paha i ka ʻilikai. ʻO ke kiʻekiʻe o kahi wahi ma luna o ka ʻilikai, ʻoi aku ka anuanu o ka ea ma laila. Pono ka ea ma ka piko o ka mauna e ʻoi aku ka mehana no ka mea kokoke ia i ka lā. No ke aha i ʻoi aku ai ke anuanu ma ka piko o ka mauna?
Wahi a Ke kānāwai o ka umekaumaha o NewtonʻO ka nui o ka ikaika umekaumaha o ka Honua ma kahi wahi he kūlike ʻole ia me ka huinahā o ka mamao ma waena o ke kikowaena o ka Honua a me kēlā wahi. No laila, ʻo ka mamao o kahi wahi mai ke kikowaena o ka Honua, ʻo ka liʻiliʻi o ka ikaika umekaumaha o ka Honua ma kēlā wahi. I nā huaʻōlelo ʻē aʻe, ʻo ke kiʻekiʻe o kahi wahi ma luna o ka ʻilikai, ʻo ka liʻiliʻi o ka ikaika umekaumaha o ka Honua ma kēlā wahi. No laila, ʻoi aku ka nui o ka ikaika umekaumaha o ka Honua ma kahi kokoke i ka ʻilikai a i ʻole ma nā ʻāina haʻahaʻa ma mua o ka ikaika umekaumaha o ka Honua ma kahi kiʻekiʻe a ma kahi piko o ka mauna.
E hana i ka hoʻokolohua ma lalo nei.
E kau i kahi kaumaha ma luna o ka dynamometer a hoʻopaʻa i ke kaumaha i hōʻike ʻia e ka dynamometer. A laila, e kau i ke kaumaha i loko o ka wai a hoʻopaʻa i ke kaumaha i hōʻike ʻia e ka dynamometer.
E hoʻohālikelike i kāu mau ana. ʻOi aku ke kaumaha i ka wā i loko o ka wai a i ʻole i ka wā ʻaʻole i loko o ka wai? No ke aha mai? E kūkākūkā i nā hopena o kēia hoʻokolohua me kāu hoa.
Ka ikaika maʻamau ʻo ia ka ikaika e hana ana ma luna o nā mea e pili ana, kahi e kū pololei ai ke kuhikuhi o ka ikaika i ka mokulele pili. ʻO kona hōʻailona ʻo N a ʻōnaehana honua o nā ʻāpana ʻo kg m/s2 a i ʻole ʻo Newton.
Hoʻoikaika iā N ma kahi pālahalaha
ʻO N ka ikaika i hoʻokau ʻia e ka papahele ma luna o ke kaola, ʻo N' ka ikaika i hoʻokau ʻia e ke kaola ma luna o ka papahele. ʻo w ka ikaika umekaumaha e hana ana ma ka poloka a i ʻole ke kaumaha o ka poloka. ʻO N a me N' nā hopena hana, ʻoiai ʻaʻole ʻo N a me w. ka ikaika pane hana.
