Why are roofs a good place for solar panels?

Roofs are typically unutilized surface that is in direct sunlight. Overhanging or nearby trees or taller buildings may cast shadows on a roof and some portions of it will likely slope the wrong way but other than those issues, it makes a great, out of the way location. Aesthetics

How much power can a car battery deliver?

if you are talking power, the the CCA, cold cranking amps at 0 deg F of larger car batteries is around 880 CCA meaning an instantaneous power in excess of 10 KW.It won't be able to sustain it for long (like 30 seconds), the battery may overheat, and it can also be limited quite a bit at lower temperatures.CAr

In terms of the efficiency, cost, and feasibility of renewable energy, how does wave energy from oceans compare to wind and solar?

It's difficult to do, but 3/4 of the planet's surface is ocean, so the potential is enormous. Here's some old research that has not been developed -

How much do transparent solar windows cost?

Actually, the biggest variable to cost in any kind of window, whether it's solar or standard is size and shape.If you get windows in standard sizes (especially width), you can take advantage of economies of scale and inventory. Get a non-standard width and automatically the price doubles! I've just been through this pricing

How efficient is Tesla's Solar Roof at storing energy?

The Solar Roof DOES NOT store energy. Tesla's Energy storage solution is made by Panasonic.Solar Shingles are much more expensive than standard size panels and cover most of the roof surface anyway to protect it against the sun.Solar shingles have a higher probability of failure because of their number - wired in series may be problematic if not addressed

Is there a battery pack cell phone charger, which is primarily charged by solar energy?

There are quite a few solar panel chargers with integrated power pack batteries, most are under $100. A favorite in our recent review / buyers guide is the BioLite 5W panel with 2200mAh battery (around $80). It's lightweight (about a pound) and compact (about

Is there a battery pack cell phone charger, which is primarily charged by solar energy?

There are quite a few solar panel chargers with integrated power pack batteries, most are under $100. A favorite in our recent review / buyers guide is the BioLite 5W panel with 2200mAh battery (around $80). It's lightweight (about a pound) and compact (about

How efficient is Tesla's Solar Roof at storing energy?

The Solar Roof DOES NOT store energy. Tesla's Energy storage solution is made by Panasonic.Solar Shingles are much more expensive than standard size panels and cover most of the roof surface anyway to protect it against the sun.Solar shingles have a higher probability of failure because of their number - wired in series may be problematic if not addressed

Is hydrogen an energy source?

No, as it's used now it's an energy storage medium. Hydrogen needs to be extracted from it's naturally occurring forms, hydrocarbons and water. After you put the energy in to extract the Hydrogen, you can oxidize there Hydrogen to recover the energy you put in to extract it (actually only

Could we build a Dyson spheres around our planet? Would this give use enough energy coming from outside to engineer a full ecosystem?

You do not seem to grasp what a Dyson Sphere is. It is a hypothetical structure that completely contains a star. There would be no energy coming in from the outside, no energy leaking out from within.Short answer: We are at least many hundreds of years, if not thousands of years away from

If no climate change action is done by 2030, and all of the climate change effects cannot be reversed, will politicians still fight for renewable energy after it will become pointless?

Climate change action is taking place, though countries like China and the US, the world's largest emitters of greenhouse gases, aren't doing enough to combat climate change. Other countries are doing more in spearheading the campaign against climate change.So what type

Can plants alive now become fossil fuels?

Unlikely.One of the things interesting things about coal: plants developed lignin long before the bacteria that eat lignin evolved. The atmosphere was both warmer and denser-the same reason you could have really large flying insects-and plants could reach large sizes. After they died, they didn't really rot, but were compressed into deeper and deeper layers of peat,

Is water a renewable resource? If not, then how can we make it renewable?

As an element,no,water is not inherently a renewable source of energy.What's really renewable,is its motion,which carries Kinetic energy.And I don't just mean its torrents,but also the motion of its particles ,which increases with temperature. So in other words,it's more of a

Can light pass through light unaffected?

Yes, unless you are passing two beam of lasers of high power inside some particular nonlinear crystal. In that case, you can achieve fancy phenomena like frequency doubling/up conversion/down conversion and all sorts of strange stuff.

Is geothermal energy considered a renewable source?

Of course not.The radioactive element decay that supply heat is limited in the earth, there is no more new supply to maintain it. The existing radioactive element decay is weakening by time elapse.The impact heat and compression heat from eons ago when the earth is formed is declining all the time and there is no new supply for

What would be a suitable energy source?

I'd go with a solution of hydrogen peroxide that will decompose when exposed to a perchlorate salt, producing oxygen gas and water.  This is the basis of the famous "elephant toothpaste" classroom demonstration, and is probably the best way to get a lot of gas going in the direction you want without it being explosive or

What is the source of wind energy?

Other people have answered about it being solar derived, I would just add that it is a technology that works better built larger since wind is faster at higher altitude, and it has a small footprint on the ground so it doesn't interfere with other activities as much as solar PV.

What is the source of earth energy?

The question is a little vague, ...but if it's

How is the Sun able to sustain so much energy for so long without fizzling out?

A whole lot of hydrogen to keep fusing which keeps pumping out such a mass of energy. But it will run out of hydrogen in about 4 billion years. Then it will cool and swell to such a size that as a

How were car alternators used to rectify energy before silicon diodes?

They used selenium rectifiers. They were somewhat large, expensive, inefficient and easily damaged. Most cars used generators which is what all of the other answers mention. However, one of the characteristics of the generator was that it did not work well at idle speeds. Police cars of the the thirties were starting to be equipped

Why do environmentalists insist that we change to green energy when it will never take the place of fossil fuels?

One of the largest corporations in North America disagrees with you. GM is moving away from IC engine cars and towards new technology systems.If all the research was completed and tests done we would be able to replace all that is ALL the burning of fossil fuels

What's going to happen when all the oil runs out?

Don't hate, I know this is a little gloomy.I think that society will completely and permanently collapse. At first, the news outlets will cover it up as they have our current economic slump, and trust me, we are having an economic slump (the proof is in the unemployment figures, consistent for

Is biogas a fossil fuel?

As Glenn Sampson indicated in his answer, it's a matter of timing.If you let any organic matter rot in concentrated conditions it's going to produce methane plus several other

Why is carbon a source of energy?

While carbon alone is a good source of energy--anthracite coal is a good example--carbon also has an amazing ability to bond with hydrogen and form hydrocarbons. Fossil fuels like coal and petroleum are chock full of hydrocarbons. Ancient algae and plant life stored solar energy through photosynthesis in the atomic bonds between hydrogen and carbon, and then

Why is hydrogen considered a fossil fuel?

Hydrogen is only so considered if it is generated from methane or other hydrogen-containing substances that actually are fossil fuels. This is, unfortunately, the mechanism by which most of the hydrogen used today is obtained.There are a number of technologies under development for generating hydrogen directly

Why can't we quit fossil fuels?

We can't quit fossil fuels because it's currently the only means in which we can reliably meet the high demand for power right now.  The power grid is sort of like live television. There are no second takes or editing. The demand for electricity on the power grid must be generated

Why are fossil fuels unsustainable?

The short answer is "because we can't make any more of them".Fossil fuels are not manufactured, they are mined. We have to drill down to geological layers that contain deposits, and remove them from the ground. Then we process them and burn them (or use them in other processes, for example, to make plastics

What is some argument that can be made that are not related to the environment about how we need to get off of fossil fuels?

One arguement is that fossil fuels are non renewable source of energy and therefore we should stop using them to conserve them. Another one is that fossil fuels are inefficient source of energy compared to other more efficient ones like hydropower and nuclear power. Also for those using as fuel for vehicles, we can

Is geothermal energy considered a renewable source?

Of course not.The radioactive element decay that supply heat is limited in the earth, there is no more new supply to maintain it. The existing radioactive element decay is weakening by time elapse.The impact heat and compression heat from eons ago when the earth is formed is declining all the time and there is no new supply for

How can fossil fuels be replaced?

Wait 100 million years after mankind goes extinct. That should do it, provided volcanic activity and tectonic plate upheaval continue to bury plants and animals and subsume areas where organic matter settles at the end of its life.Meanwhile, if we are still around, we have wind and solar

What will happen to coal and oil workers if we switch to renewable energy?

They'll lose their jobs, just as they did in previous industry downturns.Oil/gas/mining produce globally traded commodities and are very sensitive to changes in demand and price. Once prices dip below a threshold, mines are shuttered, wells are abandoned, etc, sometimes from one day to the next with little or no notice to

Why haven't we run out of fuel yet (fossil fuels)?

We will never run out, it will just get harder, more expensive and more energy intensive to mine and extract. Tar sands for instance need 5 times as much burned tar sands oil to fuel the each unit of shipped product. They don't count

How much more efficient could we make fossil fuels?

Regenerative heating will increase the power output.Increasing the upper temperature limit will increase the efficiencyUse carbon capture storage to reduce carbon dioxide emissionsUse selective catalytic reactors to reduce nitrogen oxide emissions.Remove impurities to allow for a more efficient burning.

How much of our fossil fuels and landfills would we save by using combustible waste methods including residential trash, etc.?

It is true that burning garbage for power is quite feasible. It has(or was ) done in Europe The possibility of some toxic substance being burned and entering the environment is there, but I do not know whether this has been properly researched. The main obstacle is public perception.

How can the world run without fossil fuel?

It's quite easy - the Earth receives a huge amount of energy from the sun (around 80–90 PW at sea level) which far surpasses our energy use.The reason we use fossil fuels is because they are solar energy that's very efficiently packed and pretty easy to extract and

Why are we not able to completely implement renewable energy instead of petroleum?

All fossil fuels -- petroleum included -- are finite resources. This means, eventually, we will have no choice but to use renewable energy resources. In the meanwhile, the short-term answer to your question comes down to current economics and to social/cultural/political inertia.

What are non-fossil fuels?

Coal, petroleum, and natural gas are conventionally referred to as fossil fuels. Solar, wind,and hydro are non-fossil energy sources, so fuel made from them is non-fossil fuel. Wood, and biofuels (such as corn and sugar cane ethanols) are made from crops that can be regrown

What will the Solar sector look like in 5, 10, & 20 years?

There was a HUGE boom in solar energy investments that, largely due to unpredictably low oil prices, sadly left many people feeling far from good about the risks or upside of ANY alternative energy . The hangover from those negatives will make any progress for

If we globally stopped burning fossil fuel tomorrow, what would happen?

We would immediately be confronted with the loss of global dimming. The fossil fuels put particulate in the upper atmosphere that reflects sunlight away from the surface. Scientists first saw the loss-of- global-dimming effect after 9/11 when most commercial aviation was grounded. Temperatures started going up by almost 1 C average.Our situation

Have you switched to renewable energy; if so, are you satisfied with your energy supplier?

My home has rooftop solar PV (5 kW) and a battery (9.8 kWh nominal capacity). I live in the suburbs and am grid-connected. On average, my daily electricity demand is about 5kWh and I get over 90% of that electricity from solar. I am very satisfied with my energy supplier, the Sun.

What happens when we run out of non-renewable energy?

You need to gather at least 20 giant hamster wheels and have humans run in them for 8 hours a day. This will create enough power to supply 6,000 people with power for the day. For a country with around 80 million population

How much gasoline is there left on Earth? When will fossil fuels run out?

There is extremely little gasoline on earth. Probably enough to last 2–5 months. That's all. But don't panic!You see, gasoline does not naturally exist on the earth, we refine virtually all gasoline from crude oil. Fortunately there's enough crude oil to last us about 75 years

What is solar energy? Is it light from the Sun or heat from the Sun?

Yes.Solar energy is just the term we use for energy we have gotten in some fashion from the Sun.It could be electricity via photovoltaic, hot water from pipes running across the surface of your roof, metal-melting temperatures from concentrating mirrors, or even just the heat required