about 11 minutes ago - 5 comments
Question by SquidbillyReturns: Will this be part of Obama’s new energy plan? This sounds AMAZING, after reading it do you think this is a real possibility and how many jobs world wide could it create? Since the U.S. Government funded the initial research wouldn’t it strengthen the country economically and as well as make the
about 12 hours ago - 8 comments
Image by On the Commons Question by : Energy…..we “are” energy!….:-)? I find it very tremendously interesting how everything in the universe, even us, and all matter is all pretty much made up of energy, condensed and compact, fully palpable and tangible energy, to me thats awesome, it truly does change your whole outlook on
about 18 hours ago - No comments
Question by TasteTheRainbow.: thermal energy questions? Please explain why if you take a bite of hot pizza, the sauce may burn your mouth while the crust, at the same temperature, will not. Please explain why cities that are close to the ocean tend to be warmer in the winter and cooler in the summer than
about 2 days ago - No comments
Image by seasidepost OIL – HOW DOES IT AFFECT YOU AS AN ENERGY SOURCE Article by Kartel OIL – HOW DOES IT AFFECT YOU AS AN ENERGY SOURCE “Without Energy, the wheels of industry do not turn……No cars, trucks, trains, ships, or airplanes could be built without energy, houses would remain cold and unlighted, food
about 6 days ago - 2 comments
Question by somber_pieces: Which renewable energy form has the least amount of negative impact on the envioronment? Solar is nice, but how much energy & chemicals are used to make the solar panels. Geothermal is nice too, except along with the steam comes the other nasty byproducts that come up with the steam, depending upon
about 1 week ago - No comments
Question by Katrishღ: Can you help me with my alternative energy science questions which has energy transformations and generators? 1. What form of energy is released from a bowling ball, a car, and a computer? 2. What energy transformation occurs when a solar calculator operates? 3. What energy transformation occurs when burning a campfire? 4.
about 1 week ago - 2 comments
Question by All the good usernames are taken.: What do you think happens to our energy when we die? I won’t say ghosts are impossible, but I’m definitely not all over the idea. I’m only 16. What do I know? But I’ve put a lot of thought into it, and because I’m very much a
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Question by athorgarak: Do any of you know where I can go to receive funding for energy research on the following? I am currently developing several avenues of harnessing the energy of the oceans and tides. I currently know of at least 8 different developed methodes. Two of my methodes are, as far as I
about 1 week ago - No comments
Question by bob d: questions about atomic energy? I’m wondering about multiple things. atomic questions———————————- 1.When it comes to atomic energy,it seams like the media demonizes atomic energy,is that true? 2.Did the Chernobyl incident “happen” due to the disabled safety features? 3.Did the power plant had a containment “dome”,like all power-plants today? 4.Why does the
about 1 week ago - 5 comments
Question by Ottawa Mike: Is the climate change issue really about a push for renewable energy? Here is the scenario as I see it: We are being told to reduce CO2 emissions because they will contribute to catastrophic anthropogenic global warming. To achieve that, we are basically being told (forced?) to reduce coal and oil
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about 1 year ago
Energy conversion takes place due to exited (which get exited due to sunlight) molecules present in the chlorophyll of a leaf. Energy due to photons is also there but in a negligible amount.
about 1 year ago
it is the energy from a photon of visible light, which is absorbed promoting an electron to a higher energy state allowing it to initiate a series of chemical reactions.
you are correct, but a photon does have mass, just not like you’re thinking:
http://en.wikipedia.org/wiki/Relativistic_mass
http://musr.physics.ubc.ca/~jess/p200/emc2/node11.html
relativistic mass is energy, the photon is energy and it is absorbed by the chlorophyll molecule. You are thinking of
e = mc^2 of relativity. The nucleas of an atom has a mass less than the sum of the individual protons and neutrons that make it up, this difference in mass is the energy that holds the nucleas together, it is realeased in a nuclear reaction as light, in your case sunlight.
http://fusedweb.llnl.gov/CPEP/Chart_pages/3.HowFusionWorks.html
check out these questions:
http://answers.yahoo.com/question/index;_ylt=AtsJOZHpS7qcYzgn9nR84hgjzKIX;_ylv=3?qid=1006042103902
http://answers.yahoo.com/question/index;_ylt=At_aszXPQekXUJYdC7lKyEgjzKIX;_ylv=3?qid=20080407184441AAoTpwu
about 1 year ago
Photons have energy even if they dont have mass (rest mass). Both subjects are not directly related.
The energy of a photon is calculated as Energy=frecuency*plank constants and is usally measured in electronvolts. The average photon in solar radiation has an energy of 1.5 electronvolts.
Again, no mass is required.
about 1 year ago
is it photons or electrons?
about 1 year ago
There seems to be a misconception in your statement. The photon is a boson particle and therefore has mass. But the reference to the mass of a photon is not used as it would result in an ambiguity or conflict with Relativistic Physics. Energy therefore is used to describe a photon and is given by the equation;
E = hv
Where;
E = the energy of the photon
h = Planck’s constant
v = frequency
The above shows that electromagnetic radiations have specific energies which are not extremely small. Just consider that considerable amount of energy can be generated by solar cells.
Now going back to photosynthesis. The green leaves of plants absorb all other colors of visible light except green. Green is the one that is reflected and that is what you see with your eyes.
The energy of the light that is absorbed causes reactions of carbon dioxide with other chemicals in the cells of the leaves resulting in the production of food.