GEOGRAPH 110 Lecture 3: GCC Lecture 3
1 Feb 2017
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James watt: late 1700s perfecting the steam engine. Watts: lightbulb measurement, today 60w is about the average. Watt = joule per second ( = %&) Rate: rate/flow of joules, so it"s a flow of energy and watts are the flows of joules coming out of the lightbulb. The sun is converting hydrogen to helium, creating a net loss in mass ( = 0) Thus it is pumping out a lot of energy (e) Energy flow: conduction: you need matter but it doesn"t need to move (ex. Iron bar: convection: getting energy from the bottom of the pot to the top. Need matter and the water needs to move (ex. Boiling water: radiation: there"s no matter, conduction, or convection (ex. Space: able to propagate waves that combines the property of electricity and magnets - electromagnetic waves. Light: electro-magnetic radiation with properties that we can see. Photons: pockets of energy blasting through space with qualities similar to waves.
