Suponha que 3 pessoas morem em uma casa de 5 comôdos, cada um deles iluminado por uma lampada incandescente de 60w. Um desses moradores utiliza o carro para ir ao trabalho, que gera custo de manutençao de R$2.500,00 ao ano, somente com gastos de combustivel
Qual seria a economia para essa familia, em um ano, se todas as lampadas fossem trocadas por lampadas economicas de 15w e o carro fosse deixado na garagem e o dono utilizasse onibus
Dados: custo de 1 lampada fluorescente: R$8,00
Economia de lampada fluorescente :R$2,00
Economia de uso de onibus em relaçao ao carro:80%

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Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.