Kilowatt-Hour per Unit of Fuel. The energy value of a unit of fuel depends on its mass, carbon and hydrogen content, and the ratio of carbon to hydrogen. In general, hydrogen generates approximately 62,000 BTU per pound and carbon generates around 14,500 BTUs per pound.
Quick Answer. The three largest rivers in Portugal are the Tagus River, the Douro River and the Guadiana River. All three rivers also flow through Spain. The largest river in Portugal is the Tagus River; it is 645 miles long. Continue Reading.
1. Danube-the 2nd longest European river (after the Volga); flows from southwestern Germany to the Black Sea; Vienna, Budapest, and Belgrade are on the banks of the Danube. Danau, Danube River. Bulgaria, Republic of Bulgaria-a republic in the eastern part of the Balkan Peninsula in southeastern Europe.Czechoslovakia-a former republic in central Europe; divided into Czech Republic and Slovakia in 1993.anau, Danube River. Bulgaria, Republic of Bulgaria-a republic in the eastern part of the Balkan Peninsula in southeastern Europe. Czechoslovakia-a former republic in central Europe; divided into Czech Republic and Slovakia in 1993.