Izinto Table mninzi. Formula mninzi physics. Njengoko kuboniswe yi lexinene yemvelo

Ufundo lexinene mba uqalisa ga yemvelo kwisikolo samabanga aphakamileyo. Le ngcamango ithathwa ngokuba engundoqo ngxoxo ngakumbi iikhosi theory molekyuli-nawekinetiki physics kanye chemistry. Ukuze ukufunda isakhiwo mba, iindlela uphando nga kuthathwa ukuyilwa kweekhonsepthi behlabathi zenzululwazi.

Ingcamango yokuqala umfanekiso elidityanisiweyo yehlabathi unika physics. grade 7 ukufunda lexinene lomba ngokwesiseko iingqiqo elula iindlela zophando, isicelo ngayo izinto eziphathekayo kunye neefomula.

Iindlela zophando ebonakalayo

Yinto eyaziwayo ukuba phakathi iindlela uphando ngezenzeko zendalo kukhutshwe lokuqaphela kunye nokuhlola. Ukuze ugcine ngezenzeko zendalo ezifundiswa esikolweni samabanga aphantsi: yi womlinganiselo elula, avamise "iKhalenda indalo." Ezi iintlobo zoqeqesho ezinako ukukulumkisela umntwana imfuneko ukuvavanya ihlabathi, uthelekise into zaphawula, ukuba ukuchonga ubudlelwane unobangela kunye nesiphumo.

Noko ke, kuphela beluphumeze ngokupheleleyo ukucikideka ndibunikele ezandleni isixhobo Explorer aselula Usihlube iimfihlelo endalo. Uphuhliso uphando uvavanyo olwenziwe izakhono kunye noqeqesho practical kumsebenzi elebhu.

Ekwenzeni ulingelo kwekhosi physics iqala izixa ocacisa emzimbeni ezifana ubude, indawo, umthamo. Oku limisela unxulumano phakathi zemathematika (abstract ngokwaneleyo ukuba umntwana) kunye nolwazi ngokwasemzimbeni. Ndibhenela amava komntwana, ingqwalasela elide-ndimazise izibakala ukusuka kwindawo umbono yenzululwazi kunegalelo nokusekwa kwekhono efunekayo. Injongo yoqeqesho kulo mzekelo - umnqweno self-ukuqonda entsha.

Study of mninzi

Ukungqinelana indlela yoqeqesho ingxaki ekuqaleni kwesifundo, ungakhankanya iqhina eyaziwa: "Yintoni sinzima: a Kilo lwe Lutho okanye Kilo yentsimbi" Kakade ke, abantwana abaneminyaka-11-12 lula ukuphendula umbuzo odumileyo kubo. Kodwa isibheno intliziyo mba, ithuba lokuba babone peculiarity yayo kukhokelela ingqikelelo mninzi.

Ukuxinana zenkqunto - unit ngobuninzi umthamo wayo. Table izinto konga ngokuqhelekileyo abafumanekayo iincwadi zezifundo neencwadi reference, ivumela ukuba ukuhlola umahluko phakathi kwezinto, nayo ithi leempawu mba. Qaphela umahluko izinto zobumnini ebonakalayo eziqinileyo, ezilulwelo kunye neegesi, ngaphambili ngazo, ingcaciso yale umahluko nje isakhiwo kunye nelungiselelo kwelifa amasuntswana, kodwa iimpawu Ukuzibonakalisa ngokwezibalo ukwimo kufuneka ukufunda wezenzululwazi ukuya kwinqanaba eyahlukileyo.

Ukubethelela ulwazi intsingiselo ebonakalayo ingqiqo phantsi isifundo ivumela izinto itheyibhile-mninzi. Mntwana, ngokunika impendulo lo mbuzo: "Yintoni na ixabiso lexinene into ethile", qonda ukuba le nto ubunzima 1 cm ³ (okanye 1 m ³⁾ izinto.

Umba units mninzi banokuvuselwa kwesi sigaba. Kuyimfuneko ukuba siqwalasele iindlela ukudlulisela iiyunithi kwiinkqubo ezahlukeneyo reference. Oku kwenza kube lula ukuba balahle yokucinga emile, uthabathe enye inkqubo yobalo kunye neminye imiba.

mninzi

Kakade, ngeke kugqitywa ngaphandle ekucombululeni iingxaki ukufunda physics. Kweli nqanaba zolimo calculation ifomula. mninzi yokubala kule physics grade 7, mhlawumbi, ubudlelwane ubukhulu emzimbeni kuqala abantwana. Enokubhatala ingqalelo ekhethekileyo kungekuphela nje ngenxa ukufunda lexinene kwengqiqo, kodwa niye iindlela zoqeqesho zokusombulula iingxaki.

It is at kweli nqanaba algorithm wabeka izisombululo imisebenzi computing isicelo ideology yesitalato iifomyula ezisisiseko, iinkcazelo iipateni. Fundisa uhlalutyo le ngxaki, kukho indlela yokuba uphendlo angaziwa, ingakumbi nokusetyenziswa kweeyunithi benkosi uzama ukusebenzisa i ngokunxulumene efana mninzi olungumgubo physics.

Umzekelo zokusombulula ingxaki

UMZEKELO 1

Ukumisela ukusuka into cube eyenziweyo zalishumi 540 grams kunye nomthamo 0.2 DM ^3.

ρ -? m = 540 g, V = 0,2 DM ³ = 200 cm ³

analysis of

Ngokwesiseko umbuzo le ngxaki, siyaqonda ezichaza izinto ezenziwe apho ityhubhu, siya eziqinileyo itafile ingxinano.

Ngoko ke, thina ezichaza lexinene ukwimo. Kwiitheyibhile, eli xabiso inikwa g / cm ^3, ngoko ke umthamo DM zidluliselwe ³ cm ^3.

isinqumo

Ngu definition: ρ = m: V.

Thina: umthamo, ubunzima. mninzi into kungabalelwa:

ρ = 540 g: 200 cm ³ = 2.7 g / cm ^3, engqamana aluminum.

Impendulo: Le ityhubhu yenziwe aluminium.

Ukuzimisela kwezinye eziguquguqukayo

Ukusebenzisa ifomula mninzi ubalo ikuvumela ukuba ukuchaza kunye nezinye izinto eziphathekayo. Mass, umthamo, nemilinganiselo linear izidumbu ezinxulumene umqulu ubalwe lula iingxaki. Ulwazi iifomyula zemathematika lijonge indawo kunye nomthamo amanani zejiyometri ezisetyenziswa kwizicelo evumela ukucacisa imfuno isifundo lwemathematika.

UMZEKELO 2

Ukumisela Ebubanzini umaleko yobhedu, nto leyo isale kumphezulu indawo umba 500 cm ^2, Ukuba kwakusazeka ukuba zokwaleka osetyenzisiweyo 5 g zezobhedu.

h -? S = 500 cm ^2, m = 5 g, ρ = 8,92 g / cm ^3.

analysis of

izinto Table ezinoxinano ukujonga ubungakanani mninzi yobhedu.

Sisebenzisa Ngokwefomyula yokubala lexinene. Kule formula ngumthamo we iziyobisi, ngokusekelwe apho umntu ukumisela imilinganiselo yomgama.

isinqumo

Ngu definition: ρ = m: V, kodwa le fomyula babe amaxabiso ezinqwenelekayo, ngoko sisebenzisa:

= V S x h.

Umjikelezi formula esisiseko, sinokuyifumana: = ρ m: Sh, apho:

h = m: S x ρ.

Thina ukubala: h = 5 g ⁽² x 500 cm 8,92 g / cm ³⁾ = 0.0011 cm = 11 eh.

A: Ububanzi umaleko ubhedu microns 11.

ukuzimisela yolwazi mninzi

Uhlobo yolwazi physical sciences luboniswa imifuniselo elebhu. Kweli nqanaba nezakhono abazifumene kwizifundo.Inkcaza yokuba olu lingelo, ingcaciso ngeziphumo zalo.

Umsebenzi eziluncedo nokumisela lexinene ndaba okubandakanya:

• Ukumisela lexinene engamanzi. Kweli nqanaba, bafondini, esele isetyenziswa ngaphambili cylinder, ngokulula amisele lexinene kulwelo usebenzisa ifomula.
• Ukumiselwa kwezinto echanekileyo lexinene esakha a eqinileyo. Lo msebenzi nawo ngokwawo awukho uyathandabuza, njengoko sele kuchaziwe ukuba imisebenzi yokubala efanayo kunye namava ezifunyenwe ngokulinganisa nomthamo zobukhulu linear komzimba.
• Ukubekwa mninzi okudodobalisa ezimile oluqinileyo. Ekwenzeni lo msebenzi sisebenzisa indlela yokufumanisa nomthamo lomzimba okudodobalisa esebenzisa i kwitoti. Kuluncedo ukuba kukubethelela iimpawu yale ndlela: ukukwazi Solid ukuba bathabath 'fluid, ivolyum leyo ngumthamo umzimba. umsebenzi olandelayo kuvumelekile umgangatho.

Imisebenzi zintsonkothe kakhulu

Ngaba nzima umsebenzi ngokunika abantwana amisele iziyobisi umzimba wenziwa kuzo. Esetyenzisiweyo kule Substances theyibhile mninzi ivumela ukutsalela ingqalelo imfuneko yokuba ubuchule ukusebenza ngolwazi yangasemva.

Ekucombululeni iingxaki zovavanyo, abafundi kufuneka babe nalo ulwazi malunga nokusetyenziswa kwezixhobo ngokwasemzimbeni kunye neeyunithi transfer. Amaxesha amaninzi, yiloo nto ebangela ukuba elona nani likhulu iimpazamo neziphene. Mhlawumbi lo isigaba ukufunda physics kukunika ixesha elingakumbi, oko kusenza sikwazi ukuthelekisa ulwazi kunye namava isifundo.

mninzi bulk

Ukufunda into ecocekileyo, Kakade ke, umdla, kodwa njani zenzeka izinto ezicocekileyo? Kubomi bemihla ngemihla sidibana kunye kwimixube kunye aluminium. Indlela ukuba kule meko? Ingcamango loxinano bulk akavumeli abafundi ukuba wenze iimpazamo ezithile kwaye usebenzise ixabiso avareji lexinene mbandela.

Cacisa lo mba kunyanzelekile ukunika ithuba lokuba babone kwaye uzive umahluko phakathi lexinene mba nokuxinana isambuku umi usaqala. Ukuqonda lo mahluko kuyimfuneko ukufunda ngakumbi physics.

Kakhulu umdla ngumahluko kwimeko izinto isambuku. Vumela umntwana ukufunda ezinoxinano isambuku ngokuxhomekeke izinto itywina, ubungakanani amasuntswana ngamnye (igrabile, isanti kunye ezifana. D.) Njengoko kunokwenzeka ngexesha uphando lokuqala.

Ukuxinana isihlobo izinto

Ukuthelekiswa iimpawu kwezinto ezahlukeneyo ngokwaneleyo umdla ngenxa lwamaxabiso isalamane. Relative ezinoxinano komba - enye yala maxabiso.

Ngokuqhelekileyo, lexinene xa kuthelekiswa ukwimo ixhomekeke malunga namanzi enkolo. Njengoko umlinganiselo lexinene iziyobisi ukuya reference lexinene, eli xabiso uzimisele usebenzisa pycnometer. Kodwa ekuhambeni isikolo nenzululwazi yendalo, olu lwazi ayisetyenziswa, oko umdla ukufunda nzulu le (kaninzi optional).

inqanaba Olimpiyadi yokufunda of physics kunye chemistry zingachaphazela ingqikelelo "ingxinano isihlobo umbandela ngokuphathelele hydrogen." Kudla lisetyenziswa igesi. Ukuze ubone lexinene xa kuthelekiswa le gesi umlinganiselo ubunzima izinyo ze gesi yovavanyo ubunzima izinyo hydrogen. Ukusetyenziswa mass isalamane ezinto akukho ngaphandle.