Sustainable Energy - Without the Hot Air
2.11. Gadgets http://www.ck12.org Figure 11.3:This wasteful cordless phone and its charger use 3W when left plugged in. That’s 0 ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives TABLE2.9:(continued) Gadget Power consumption (W) Radio cassette- player ...
2.11. Gadgets http://www.ck12.org Other gadgets A vacuum cleaner, if you use it for a couple of hours per week, is equivalent to ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives Figure 11.5:Information systems and other gadgets. Notes and further read ...
2.11. Gadgets http://www.ck12.org reactive power is at most 0.16W. When actually making a phone-call, the mobile uses 1W. Furthe ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives 2.12 Wave If wave power offers hope to any country, then it must offer ho ...
2.12. Wave http://www.ck12.org Waves have long memory and will keep going in the same direction for days after the wind stopped ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives of power to cover modern consumption. However,our population is too big.T ...
2.12. Wave http://www.ck12.org Figure 12.2:Wave. What’s the weight of a Pelamis, and how much steel does it contain? One snake w ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives The waves on the east coast of the British Isles are usually much smaller ...
2.12. Wave http://www.ck12.org conversion from mechanical energy to electricity.The UK’s first grid-connected wave machine, the ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives 2.13 Food and farming Modern agriculture is the use of land to convert pe ...
2.13. Food and farming http://www.ck12.org that a suckling cow of weight 450 kg needs 85 MJ/d, which is 24 kWh/d. Great, our gue ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives I’ve again taken the physiological liberty of assuming “animals are like ...
2.13. Food and farming http://www.ck12.org required to make Tiddles’ food is just shy of 2 kWh per day. A vegetarian cat would r ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives Figure 13.8:Food and farming. Meat chickens’ feed has an energy content o ...
2.13. Food and farming http://www.ck12.org footprints of 21.7, 4.9, and 3.8 kWh per kg respectively. Sharing this energy out bet ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives 2.14 Tide The moon and earth are in a whirling, pirouetting dance around ...
2.14. Tide http://www.ck12.org crest up our paddling pool. Similarly each Atlantic trough sends a trough up the paddling pool. C ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives Rough estimates of tidal power When you think of tidal power, you might t ...
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