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.
Which river flows through London England? The main river that flows through London, the capital city of England is the Thames river, or River Thames (pronounced 'temz', or 'tems'; Roman name Tamesis). The Thames, at â¦ 346 km (215 miles), is the longest river in England and the second-longest in the UK.The longest UK river is the Severn, just eight km (five miles) longer than the Thames. The river wasn't made to flow through London, but London was built on both banks of the river.he Thames, at â¦ 346 km (215 miles), is the longest river in England and the second-longest in the UK. The longest UK river is the Severn, just eight km (five miles) longer than the Thames. The river wasn't made to flow through London, but London was built on both banks of the river.