We’re rewarding the question askers & reputations are being recalculated! Read more.

Questions tagged [energy]

The ability a physical system has to do work on other physical systems.

Filter by
Sorted by
Tagged with
5
votes
2answers
583 views

Is the production of nuclear power very expensive? [duplicate]

Reuters recently published the following piece: Nuclear energy too slow, too expensive to save climate: report Inside, it says: The cost of generating solar power ranges from $36 to $44 per ...
44
votes
1answer
12k views

Did/does the US government keep secret papers by Nikola Tesla?

A popular conspiracy theory holds that Tesla invented a free energy device, but that the powers that be prevented him from publishing it, because it would hurt their investments. Of course, free ...
4
votes
2answers
410 views

Does tapping on “acupoints” during an emotional problem change chemistry in the brain?

This claim is by David Feinstein, pH.D. in Acupoint stimulation in treating psychological disorders: Evidence of efficacy [.pdf] Essentially it is a claim that stimulating acupuncture points during ...
20
votes
1answer
1k views

Does the UK have enough wind to power the country five times over?

Greenpeace UK tweeted about the UK having enough wind to power the country five times over: MT @1010: The UK has enough wind to power the country five times over. Let's use it! After a bit of ...
0
votes
0answers
156 views

Do windmills take more energy to build than they could produce? [duplicate]

Saw this posted on a friend's feed on Facebook recently. Are the numbers correct, and is the final statement ("A windmill could spin until it falls apart and never generate as much energy as was ...
65
votes
0answers
8k views

Does one transaction on Bitcoin require 215 kWh? [closed]

This seems unbelievable: This averages out to a shocking 215 kilowatt-hours (KWh) [sic] of juice used by miners for each Bitcoin transaction (there are currently about 300,000 transactions per ...
7
votes
2answers
588 views

Will smart meters cost each UK household 420 GBP?

The roll out of smart meters is well on its way in the UK. In this article it is claimed that smart meters will cost each household 420 pounds. Apparently, this money will be taken from each customers ...
23
votes
7answers
7k views

Are there technologies that provide unlimited free energy?

Many different sources claim to be able to produce "unlimited free energy". For example: UNLIMITED FREE ENERGY IDENTIFIED Company claims to have developed new technology that provides unlimited free ...
5
votes
1answer
424 views

Did the Falkland Islanders only have peat as fuel until the arrival of the Argentine oil companies?

I found this paragraph in the Spanish wikipedia entry about peat. A group of Falklanders shoveling peat around the 1950s. Peat was the only form of fuel used in the Falklands until the arrival of ...
17
votes
1answer
987 views

Are claims about saving power by turning appliances off instead of leaving them in standby accurate?

I keep hearing this argument that if you powered down all the appliances you normally leave on standby (TV, hifi, set top box, DVD/Blu ray player, computer, etc) you'll save nearly £90 a year in ...
15
votes
1answer
1k views

Does one SUV tank of ethanol “take as much grain as could feed a person for a whole year?”

From The Great Transition, (c)2014, by Lester R. Brown (preface, page xiii): [F]illing the tank of a large SUV one time with ethanol takes as much grain as could feed a person for a whole year. ...
14
votes
1answer
5k views

Is a car's fuel consumption increased when the headlights are on?

I have read in many sites that a car with lights on will consume more fuel that with lights off. The (hand-waving) justifications that I see tend to mention that "energy has to come from somewhere" ...
1
vote
0answers
363 views

Are home owners required by law to connect gas in Victoria, Australia?

The One Step Off The Grid website claims that home owners in Victoria are required to connect to the gas network. It does not give an easy way to verify this claim. Did you know Victoria’s building ...
-4
votes
1answer
460 views

Is there compelling proof against an alternative to the law of conservation of energy? [closed]

The law of conservation of energy states that energy cannot be created or destroyed, but changed into different forms, which I've never found entirely compelling. It's impossible to measure the energy ...
5
votes
0answers
636 views

Does the Bitcoin network consume as much energy as Denmark?

According to Ars Technica: One estimate suggests the Bitcoin network consumes as much energy as Denmark. There are other sources that make similar claims: Greentech Media claim: The Bitcoin ...
11
votes
2answers
781 views

Is flying the worst choice of travelling, considering the greenhouse effect and carbon-dioxide emission? [closed]

The communities I live in in Germany keep telling everybody that flying should be avoided by all circumstances, because it has a far bigger ecological footprint than any other mode of transportation. ...
49
votes
3answers
13k views

Can the US be powered by a 100 miles x 100 miles solar grid? [duplicate]

In this article Elon Musk is quoted to say that the US can be powered by a solar grid shaped as a square (in video he says "a corner of Utah or Nevada") 100 miles x 100 miles big. “If you wanted ...
20
votes
1answer
1k views

Does nuclear power cause fewer deaths than other forms of electricity production, accidents included?

There have been several questions related to nuclear power in comparison to other forms of electricity production: Are there fewer accidental deaths at nuclear power plants than others? Do coal ...
3
votes
0answers
419 views

Does one kg of rock contain more energy in the form of U-238 than one kg of petroleum? [closed]

Let's consider rock and petroleum. Which contains more energy per kilogram? Due to Einstein, we know mass is energy, and the energy contents of both are equivalent. However, let's forget this and ...
42
votes
3answers
8k views

Did wind power supply less than half a percent of global energy in 2014?

From The Spectator: Wind turbines are neither clean nor green and they provide zero global energy: Here’s a quiz; no conferring. To the nearest whole number, what percentage of the world’s energy ...
23
votes
2answers
2k views

Do wind turbines kill many birds each year?

It has been claimed that due to their large size, and the velocity of their blades that wind turbines kill large numbers of birds that run into them at night, or in fog, and die. http://www....
5
votes
1answer
2k views

Does Leonardo DiCaprio fly on private jets?

Does Leonardo DiCaprio fly on private jets? Example claim: Leonardo DiCaprio flies 8,000 miles in private jet to accept ‘green award' Oscar-winner Leonardo DiCaprio flew an additional 8,000 miles ...
1
vote
1answer
1k views

Has Brilliant Light Power developed a new source of energy from water molecules?

Brilliant Light Power is a company that claims, on their web-site, to have: developed a new commercially competitive, non-polluting, plasma-based primary source of massive power from the conversion ...
28
votes
1answer
12k views

Is there any data on how efficient Tesla wireless power transmission was?

It's widely believed that Nikola Tesla not only demonstrated wireless power transmission but his works in this field were very successful. Wikipedia only says this The electric energy transmitted ...
29
votes
5answers
4k views

Are there fewer accidental deaths at nuclear power plants than others?

I have seen the stats on this website saying that the number of death caused by nuclear accidents was way smaller then those caused by any other energy production factory. Do you have any information, ...
26
votes
1answer
10k views

Are there 14,000 abandoned wind turbines in the USA?

A number of blogs and sites seem to repeat a claim 14,000 ABANDONED WIND TURBINES LITTER THE UNITED STATES, and in particular: The towering symbols of a fading religion, over 14,000 wind turbines, ...
8
votes
2answers
4k views

Do Duracell batteries last longer than normal batteries?

The claim is Up to 10 times longer lasting power (*) vs. ordinary zinc carbon batteries in high powered toys and flash cameras (picture from Amazon) Do Duracell batteries last longer than ...
23
votes
2answers
2k views

Does the amount of land needed to get the USA to zero-carbon electricity correspond to a small area of Texas?

After watching Elon Musk's presentation regarding the Tesla Powerwall, I had a question. On his diagram of the USA, he claims that a "tiny blue square" on the top of Texas that consists of solar ...
7
votes
1answer
441 views

Has a carbon price lead to a 8.6 percent drop in electricity demand in Australia?

In a press release China’s pilot carbon trading market taps UNSW expertise (press release is by the UNSW, which is my employer) Minister Combet highlighted the benefits to date of Australia’s ...
23
votes
2answers
2k views

Are 1 to 4 tons of coal required to create only one solar panel?

In the There's No Tomorrow video, they affirm several things about solar panels (and a lot of other things). The one I'm the most curious about is this: All the world's photovoltaic solar panels ...
6
votes
1answer
698 views

Can one generate enough electricity from a plant to power a cellphone?

This company is marketing a product which uses the photosynthesis of a single houseplant to charge a phone. http://www.bioo.tech/ IIRC the theoretical maximum efficiency of photosynthesis is about ...
16
votes
1answer
2k views

Can thorium end the energy crisis?

It seems that, as of lately thorium is steadily increasing in popularity, as an alternative to traditional nuclear fuels. Here's Mr. Kirk Sorensen in a TED video advocating the use of thorium. Thorium ...
14
votes
3answers
1k views

Are electric cars beneficial to the environment compared to low consumption modern cars?

Imagine an electric car in a country where most energy come from coal (which i believe is the dirtiest). Add this to the pollution that disposing the batteries will create, or the carbon footprint ...
15
votes
0answers
753 views

Solar energy in place of conventional energy sources [closed]

The first time I came across these arguments against solar energy was in "Overload" by Arthur Hailey. Admittedly, this is fiction, but the arguments seems to have some merit. Using solar cells to ...
175
votes
4answers
25k views

Does a webpage with a black background save energy?

Blackle is a search engine that claims to save energy because it uses a black background. Is there any evidence to back up their claim that a website using a black background will save energy, and if ...
8
votes
2answers
7k views

Does painting your radiators black make your heating more efficient?

I have heard that painting radiators in your central heating circuit black can make your heating more efficient. The 'scientific' basis being that black, whilst absorbing light in the visible spectrum,...
39
votes
3answers
2k views

Did the town of Woodland, North Carolina, USA reject a solar plant because of cancer and photosynthesis concerns?

The Raonoke Chowan News Herald reported on 8 December 2015 reports that the town of Woodland, North Carolina, USA rejected a solar farm, citing concerns on photosynthesis and cancer: Jane Mann said ...
1
vote
0answers
202 views

Can a human generate a significant amount of electrical energy? [closed]

I found this video which claims to generate enough electrical energy to last 24 hours with one hour of cycling. However, one of the images shown was a meter which claimed 10 A, 10 V DC . Even assuming ...
5
votes
1answer
3k views

Does the Theradome Laser Helmet deliver around 7 J/cm2 to the head?

The Theradome Laser Helmet is claimed by its manufacturers to promote healthy hair growth. In this infographic, they claim it delivers energy to the skull at a concentration of 6.959 j/cm2 - ...
19
votes
1answer
590 views

Is widespread adoption of the electric car unlikely due to lithium scarcity?

Although lithium is very abundant in sea water, only lithium mineral extraction seems to be economically viable. The world's total reserves in lithium minerals is estimated at 13.5 Mt (not sure ...
3
votes
1answer
745 views

Does sealing electrical outlets reduce heating costs?

I stumbled upon this blog post which claims that installing foam gaskets and plugging your electrical outlets with plugs will reduce your heating costs by reducing air leakage. Is this true?
6
votes
0answers
254 views

Are Chinese companies dumping defective solar panels in other countries?

I've come across some people claiming that Chinese solar energy companies are dumping defective panels in other countries. The gist of the claim is that these low-cost panels will drive local ...
6
votes
1answer
2k views

Did Tesla say that one could get or transmit energy through thin air [duplicate]

Possible Duplicate: Can you create energy out of nowhere ? I recall reading that Nikola Tesla suggested that electricity could be created from the air. This claim is stated in the following quote ...
22
votes
2answers
8k views

Is nuclear fusion energy as safe as its proponents claim?

With my limited knowledge of the process of nuclear fusion energy, this seems like one of the most promising methods for producing huge amounts of energy, with relatively very low risk, once ...
0
votes
1answer
406 views

Is there any proof that blackle.com conserves energy? [duplicate]

There are claims that blackle.com conserves energy given that it is darker themed and produces less light. There is a counter under the search box that constantly increases. But in today's era of ...
21
votes
3answers
3k views

Does the digestion of some foods burn more calories than it supplies?

Calories in food is a measurement of the amount of energy it will provide to the body. I've heard that eating some foods actually make you USE more calories than you consume. Do any foods actually ...
3
votes
1answer
506 views

Is Gasification of Garbage a Viable Energy Solution?

I read this NYT article about using blast furnaces to turn garbage into burnable gas, yielding a net energy output. The article suggests that the company, Sierra Energy, is very close to building a ...
17
votes
2answers
1k views

Is the net output of CO₂ from Nuclear Energy lower than the net output of other energy sources?

While CO₂ is not produced directly when producing electricity from nuclear power, it is obvious that obtaining the radioactive material and preparing it for its use in a plant inevitably produces some ...
10
votes
0answers
332 views

Are powerful entities preventing the development of free or extremely low cost energy sources? [closed]

This is a common claim of people selling "free energy" devices that the government or oil companies are trying to suppress their work. I'm wondering if there's any documented examples of an oil ...
2
votes
0answers
111 views

Can a car run on water? As per this experiment [duplicate]

The Agha Waqar's car that ran on water was a great news for a long time. Where a Pakistan based inventor invented a car that got all the power from water. He was using a water kit to get the energy. ...