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*Merenje predstavlja određivanje veličine neke
pojave ili objekta.
*Ta veličina se iskazuje numerički (brojem) i
jedinicom određene veličine.
*Merenje je kamen temeljac trgovine, nauke,
tehnologije i kvantitativnih istraživanja u mnogim
disciplinama.
*Mogu se meriti osnovne veličine I izvedene
velicine. To su:
•dužina,
•masa,
•vreme,
•termodinamička temperatura,
•električna struja,
•intenzitet svetlosti
•količina supstance,brzina,pritisak,napon…
*Opseg i primena merenja zavise od konteksta i
discipline.
*Cilj merenja je dobijanje pouzdanog iskaza o
nepoznatim podacima objekta.
oznaka fizicke velicine koju
merimo
Brojna vrednost fizicke
velicine
oznaka merne jedinice
*Povrsina je izvedena fizicka velicina.
*Oznaka za povrsinu u fizici je latinicno slovo S.
*Osnovna jedinica za povrsinu je m².
*Merenje zapremine pravilnih tela svodi se
na merenje dimenzija (dužine, širine i
visine, odnosno debljine) i primenu
odgovarajuće formule.
*Zapremina se obeležava velikim latiničkim
slovom V. Osnovna jedinica za merenje
zapremine jeste kubni metar (m3).
*Vreme se označava malim latiničkim slovom t.
*Oznaka za vreme potiče od početnog slova
latinske reči tempus, što znači “vreme”.
* Osnovna jedinica za merenje vremena jeste
sekunda (s).
*Nijedno merenje nije sasvim tačno, već uvek
daje neki približan rezultat.
*Greške koje se javljaju pri merenju vrednosti
fizičke veličine mogu se pojaviti iz različitih
razloga, a najčešće su prouzrokovane
postupkom merenja i mernim instrumentom.
*1) sistematske
*2) slučajne
*3) grube
*
*Zanimljivosti
*3500.godine pre nove ere-Egipcani su
podelili dan I noc na po 12h I merili
proticanje vremena suncanim satom.
*
*Arhitas iz Tarenta,(428-437g.p.n.e),u svojoj
recenici,,vreme je veliki broj malih
pomeranja,odnosno odredjeni interval u
strukturi svemira,,verovatno je prvi
matematicko vreme definisao kretanje
svemirskog sistema.
*Uljani satovi su imali ulje koje je trajalo
6h.Iznad je bio stakleni cilindar koji je sa
spoljne strene bio graviran.Nivo ulja u posudi I
njegova potrosnja odredjivali su vreme.Nastali
su oko 300g.i trejali sve do 20.vek.
*Sve do kraja 17.veka,fenjerasti satovi su imali
jednu kazaljku,koja je pokazivala sate,a od
18.veka dve kazaljke.Fenjerasti satovi su
stajali na zidu a tegovi koji su ga pokretali
visili su ispod.U16.veku u Nemackoj su se
pojavili okrugli,tanjirasti satovi.
Pitanja
1.Koliko ima osnovnih jedinica Medjunarodnog SI-sistema
a)4
b)5
c)6
d)7
2.Koje fizicke velicine su u potpunosti odredjene b
rojnom vrednoscu I mernom jedinicom?
a)vreme I zapremina
b)put I sila
c)Brzina I povrsina
3.Koje od nabrojanih mernih jedinica su osnovne jedinice SI-
sistema?
a)metar,kilogram I kelvin
b)Paskal,kelvin I kilogram
c)metar,njutn I sekund
d)sekund,kilogram I paskal
Nikoleta Djordjevic
Mina Vasiljevic VII/1

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Merenje (2) nikoleta (1)

  • 1.
  • 2. *Merenje predstavlja određivanje veličine neke pojave ili objekta. *Ta veličina se iskazuje numerički (brojem) i jedinicom određene veličine. *Merenje je kamen temeljac trgovine, nauke, tehnologije i kvantitativnih istraživanja u mnogim disciplinama.
  • 3. *Mogu se meriti osnovne veličine I izvedene velicine. To su: •dužina, •masa, •vreme, •termodinamička temperatura, •električna struja, •intenzitet svetlosti •količina supstance,brzina,pritisak,napon…
  • 4. *Opseg i primena merenja zavise od konteksta i discipline. *Cilj merenja je dobijanje pouzdanog iskaza o nepoznatim podacima objekta.
  • 5. oznaka fizicke velicine koju merimo Brojna vrednost fizicke velicine oznaka merne jedinice
  • 6. *Povrsina je izvedena fizicka velicina. *Oznaka za povrsinu u fizici je latinicno slovo S. *Osnovna jedinica za povrsinu je m².
  • 7. *Merenje zapremine pravilnih tela svodi se na merenje dimenzija (dužine, širine i visine, odnosno debljine) i primenu odgovarajuće formule. *Zapremina se obeležava velikim latiničkim slovom V. Osnovna jedinica za merenje zapremine jeste kubni metar (m3).
  • 8. *Vreme se označava malim latiničkim slovom t. *Oznaka za vreme potiče od početnog slova latinske reči tempus, što znači “vreme”. * Osnovna jedinica za merenje vremena jeste sekunda (s).
  • 9. *Nijedno merenje nije sasvim tačno, već uvek daje neki približan rezultat. *Greške koje se javljaju pri merenju vrednosti fizičke veličine mogu se pojaviti iz različitih razloga, a najčešće su prouzrokovane postupkom merenja i mernim instrumentom. *1) sistematske *2) slučajne *3) grube
  • 10. * *Zanimljivosti *3500.godine pre nove ere-Egipcani su podelili dan I noc na po 12h I merili proticanje vremena suncanim satom.
  • 11. * *Arhitas iz Tarenta,(428-437g.p.n.e),u svojoj recenici,,vreme je veliki broj malih pomeranja,odnosno odredjeni interval u strukturi svemira,,verovatno je prvi matematicko vreme definisao kretanje svemirskog sistema.
  • 12. *Uljani satovi su imali ulje koje je trajalo 6h.Iznad je bio stakleni cilindar koji je sa spoljne strene bio graviran.Nivo ulja u posudi I njegova potrosnja odredjivali su vreme.Nastali su oko 300g.i trejali sve do 20.vek.
  • 13. *Sve do kraja 17.veka,fenjerasti satovi su imali jednu kazaljku,koja je pokazivala sate,a od 18.veka dve kazaljke.Fenjerasti satovi su stajali na zidu a tegovi koji su ga pokretali visili su ispod.U16.veku u Nemackoj su se pojavili okrugli,tanjirasti satovi.
  • 14.
  • 15. Pitanja 1.Koliko ima osnovnih jedinica Medjunarodnog SI-sistema a)4 b)5 c)6 d)7 2.Koje fizicke velicine su u potpunosti odredjene b rojnom vrednoscu I mernom jedinicom? a)vreme I zapremina b)put I sila c)Brzina I povrsina 3.Koje od nabrojanih mernih jedinica su osnovne jedinice SI- sistema? a)metar,kilogram I kelvin b)Paskal,kelvin I kilogram c)metar,njutn I sekund d)sekund,kilogram I paskal