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.
Portugal: Banks & Money. The currency for Portugal is the Euro. In the ALGARVE region you can buy/exchange Euros very easily at Cambios (Bureaux de Change or Change Shops), Hotels and even shops. Many banks no longer offer foreign exchange however. The best rates and commissions are normally found at the bureaux in larger towns.