there are some other sourses of energies like sunlight etc.Can we convert sunlight in to useful energy by some means .One day if it is possible we can live without spending any money for food
2006-07-06 04:22:35 · 39 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
BOBBY SANDS?
2006-07-06 04:25:57 · answer #1 · answered by El Mariachi 4 · 0⤊ 2⤋
no, it wont happen. you need water, most importantly. if you didnt have any water you would be dead in about 5-7 days. food on the other hand, depends on how much energy you have stored up. a really fat person would be able to survive longer without food than a skinnier person would be able to but a year.... no
as for making our own food: your pretty much talking about photosynthesis if you're asking can we make our own food from the sunlight. we would need chloroplasts and a whole mess of other things to make that possible. the only way i could even concieve of this happening would be through genetic engineering and someone successfully transplanted the plant gene for complete photosynthesis into the human genome without any harmful side effects. which seems very doubtful, as i'm sure the means for photosynthesis is not regulated by any one gene but multiple genes and the introduction of such genes to a human or any other animal for that matter would surely either just not work or would create some sort of horrible effect that would not allow the animal to live. its seems like only science fiction to me
2006-07-06 05:59:47 · answer #2 · answered by Newtibourne 2 · 0⤊ 0⤋
No. A person can last for a few days without water, and a few weeks without food, but not for a year. We convert sunlight to useful energy by growing crops, which trap the solar energy through photosynthesis. But food will never be free of cost: regardless of the process used, the crops must be grown, harvested, packaged, and transported, and the costs of doing all of that (and of buying the equipment with which to do it) must appear in the price of food.
2006-07-06 06:29:28 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Plants can convert sunlight to energy, humans can't. And even plants need water.
Humans can live for several weeks with no food, but will be very ill, and may even die after just a few days without water.
2006-07-06 04:26:17 · answer #4 · answered by Flyboy 6 · 0⤊ 0⤋
I have heard abouy an Indian man who had not ate any food for last 5 years but i think it is impossible for a man to live without water.
2006-07-06 05:47:22 · answer #5 · answered by ☼ Magnus ☼ 4 · 0⤊ 0⤋
U will start to die after 3 days with out water. Food on the other hand u go alot further
2006-07-06 04:26:38 · answer #6 · answered by ? 3 · 0⤊ 0⤋
NO!!!! Roughly speaking a human can exist without food for a month and without water for a week. Roughly speaking! There may be some exceptions and then there's David Blaine ;-)
2006-07-06 04:26:04 · answer #7 · answered by hystoriker 3 · 0⤊ 0⤋
no, humans can only survive without water for 3 days, and food for 3 weeks.
2006-07-06 09:01:32 · answer #8 · answered by The Frontrunner 5 · 0⤊ 0⤋
Not a chance. Especially not without water. Sunlight won't work because we don't have chlorophil (however you spell it) in our body. Maybe the incredible hulk does though.
2006-07-06 14:03:36 · answer #9 · answered by jsn77raider 3 · 0⤊ 0⤋
No we cannot. It would take a lot longer than one year for the human species to evolve into a more plant like life form.
2006-07-06 04:27:24 · answer #10 · answered by sirdaz_uk 3 · 0⤊ 0⤋
No we can't survive without food or water,because that's one reason why we are living life.Have you heard of the starvation?For only a couple of months and it still killed people.
2006-07-06 04:26:37 · answer #11 · answered by Sophia 4 · 0⤊ 0⤋