A=Töö(1J) N=Võimsus (1W) t=Aeg(1s) - Soojushulga arvutamine Q=c*m(T2 T1) Q= Soojushulk c= Erisoojus (4200J/Kg*0C) m=Mass (1kg) T2=Kõrgem soojus, ehk 710C T1=algtemperatuur. Q - Kasutegur = A 4. Arvutamine Anuma mass = 253g Anum koos veega = 977g Vee mass = 724g Elektripliidi võimsus on 1500w Vee algtemperatuur on 210C Aega vee soojenemiseks kulub 14 minutit ja 40 sekundit 1) Leian Töö A=N*t A=1500w*880s=1320000J 2) Leian Soojushulga Q=c*m(T2 T1) Q= 4200J/Kg*0C*0,724kg(710C- 210C)=152040J Q 152040 J 3) Arvutan Kasuteguri = = = 0,115 *100%=11,5% A 1320000 J Rauno Sander 17.04.2008
with his armour, weapons, treasures Ceremonial whetstsone can be scarcely anything than a sceptre Treasure is now in British museum Alfred the Great and the rise of Wessex to cultural pre-eminence Alfred the Great was the king of southern Anglo-Saxon kingdom of Wessex, stands out for his social and educational reforms and for military successes against Danes Improved the army and navy, bought vessels bigger than vikings The first town planner By 880s Wessex was covered with public strongholds, grid of streets, planned fortified towns where landowners, traders and crafters started marketing First English king who worte books More learned laity Danelaw, Viking territories in the British Isles During 9th C all Scottish Islands and the Isdle of Man went to the Vikings The Danes invaded East Anglia, Northumbria, Mercia and established their kingdom- Danelaw
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