Jedna od najboljih skripti za učenje vjerojatnosti i statistike za tvz
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Zadaci iz tokarenje i glodanjaFull description
Pojam i Zadaci Preduzeca
Repetitorij i zadaci za prijemne ispite.
elementi strojeva I - FesbFull description
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Uvod u termodinamiku (prvo predavanje - Termodinamika I, dr.sc.Sandira Eljsan, MF Tuzla)
Ultrazvuk je zvuk cija je frekvenca iznad gornje granice cujnosti za normalno ljudsko uho, koja iznosi 20 (20000 herca).Full description
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Ultrazvuk je zvuk cija je frekvenca iznad gornje granice cujnosti za normalno ljudsko uho, koja iznosi 20 (20000 herca).Full description
PRIMENA PRVOG I DRUGOG ZAKONA TERMODINAMIKE (ZADACI)
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Termodinamičku analizu, zasnovanu na dva fundamentalna zakona, najbolje ćemo shvatiti na primeru energetskih konverzija unutar izolovanog sistema sastavljenog od nekoliko energetskih rezervoara. Zamislimo izolovan termodinamički sistem sastavljen od tri toplotna rezervoara: i (na temperaturama , i ) i mehaničkog rezervoara . Pretpostavimo da je njihov energetski sadržaj poznat i da iznosi i odnosno Treba napomenuti da smo, zbog pojednostavljenja, energetske sadržaje
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Za svaki od slučajeva utvrditi da li toplotni motor zadovoljava prvi zakon i da li krši drugi zakon.
I
II
a) da
da (moguće)
b) da
ć
Kelvin–Planck
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Za svaki od slučajeva utvrditi da li toplotna pumpa zadovoljava prvi zakon i da li krši drugi zakon.
I
II
a) da
da (moguće)
b) da
da
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Klima uređaj oslobađa 5.1 kwh u prostoriju, a troši 1,5 kW! KKD?
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Kuća se greje primenom toplotne pumpe (KKD = 2.2) , i temperatura se održava na 20oC. Procenjuje da se gubi 0,8 kwh energije. Temperatura okoline - 10oC. Rad potreban za funkcionisanje toplotne pumpe?
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Na mestima gde je gde je vazduh je vazduh je vrlo hladan zimi, kao - 30oC moguće je pronaći temperature od 13oC u unutrašnjosti zemlje. efikasnost toplotnog motora između ova dva termalna rezervoara?