GEOG 125 Lecture Notes - Lecture 9: Solar Thermal Collector, Intertidal Zone, Common Ethanol Fuel Mixtures
Document Summary
On a global scale we still use lots of fossil fuels. In canada hydro is mostly used and oil and natural gas. In the states mostly natural gas, oil and coal is mostly used. Most abundant fossil fuel (used for 3000 years0. Modern extraction and use began in the 19850s. "rock oil: used for lamps and as a lubricant. Edwin drake drilled the world firt oil well in usa in 1859. Canada ; less than0. 005% of the worlds opulation. Energy can be stored in and released from, matter. Absorption of radiation increases sensible heat or changes phase (latent heat energy) Energy "use" results in dissipation, dispersion, or conversion (entropy) Energy is expended to enable production and use. Net energy is the ratio of amount out for amount in. These are more readily renewed (re-stored) but may also be depleted. Sources may be readily depleted and not, in any practical sense, re-stored.
