Fuel Definition and 581 Threads

1 litre of petrol contain about 8.79 KWHr (30023 BTU) of energy. A car wieghs about 1500Kg is able to run for about 10000 meters by burning 1 litre of petorl. For moving 1500 Kgs for 10000 meters the energy required is 150 Megajoules which is equal to 41.67 KWHr. How this is possible? Am I...

I was given a task for homework. I am in 8th grade and please could you tell me how you separate hydrogen from h2o and make hydrogen fuel. thanks

Homework Statement The space shuttle, with an initial mass M = 2.41E+6 kg, is launched from the surface of the Earth with an initial net acceleration a = 26.1 m/s2. The rate of fuel consumption is R = 6.90E+3 kg/s. The shuttle reaches outer space with a velocity of vo = 4632 m/s, and a mass of...

Coal- clean? or dirty? Hello everyone I have received a termproject regarding energy myths and my topic is this: Can coal be as clean as other fuels? I personally would say yes but I need some good replies from you guys for this survey...either the eco side or the capitalist side...

I'm trying to calulate the efficency of a small hydrogen fuell cell that I built. I have all of the measurements, but I'm not coming up with a resonable effiency. The power to electrolyze the water is the P IN. 3.25 W =2.5 V x 1.3Amps (.21 mA) We measured the electrical power out...

Homework Statement I'm trying to calulate the efficency of a small hydrogen fuell cell that I built. I have all of the measurements, but I'm not coming up with a resonable effiency. Homework Equations \frac{P OUT}{P IN}x 100 The power to electrolyze the water is the P IN. 3.25 W...

Rocket propulsion In the serway textbook at the rocket propulsion section it is mentioned that If the fuel is ejected with a speed v_e relative to the rocket (the subscript e stands for exhaust, and v_e is usually called the exhaust speed), the velocity of the fuel relative to the Earth is...

it is unfortunate that it has come down to this... http://news.bbc.co.uk/2/hi/middle_east/7068239.stm this conflict has no real winners... :frown:

Any ideas about the causes of the incident at the new Australian research reactor (OPAL) where some fuel plates in some of the assemblies were found to be elevated? I.e., translated vertically upwards. This has been reported as the plates being "partially" dislodged, but the actual degree of...

Homework Statement A bus runs out of fuel as it approaches a hill. If the hill is 3.54 m high, how fast must the bus be traveling in order to coast just to the top of the hill? Homework Equations The Attempt at a Solution How do we solve this problem?? We aren't given any...

Homework Statement Measurements o the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported with a sample mean of 3.26. Test the hypothesis H_0: \mu=2.95 versus H_1: \mu\neq2.95, and draw appropriate conclusions. Use the p-value approach. Homework Equations...

http://www.nextenergynews.com/news1/next-energy-news-betavoltaic-10.1.html I cam across this article. It is horribly written from a scientific standpoint and lacks some necessary information on how the device works. But the basics are... Tritium is the beta source, porous silicon matrix...

i need to calculate the surface area of a furnace for a firetube boiler. do anyone know what is the temperature of the gas inside the furnace when Heavy fuel oil is burnt?and also what is the temperature of the furnace wall. thank you in advance

I hear a lot of talk about the law from teh 70's passed by Congress that forbade the reprocessing of commercial SNF. In my Radioactive Waste Management class today, the professor (who is a CHP/PE who specializes in waste management) said it was actually Carter, not Congress (which means, I...

what is the stiochiometric air-to-fuel ratio for heavy fuel oil? i need it to calculate the enthalpy of gas fromheavy fuel oil firing .

Anyone know how long a typical let's say news helicopter can last in the air given how much fuel it holds? I am not sure but I heard a news helicopter or a police helicopter probably won't last more than 3 hours in the air. Some military transport helicopters can only do about 2 and attack...

[SOLVED] Fat: the fuel of migrating birds Consider a bird that flies at an average speed of 10.7 m/s and releases energy from its body fat reserves at an average rate of 3.70 W (this rate represents the power consumption of the bird). Assume that the bird consumes 4g of fat to fly over a...

Homework Statement I posted int he other section but not sure if that area was a bit high maths I have this questions an answer to it would be great. .Q.1 At t minutes after an engine starts, the rate of fuel consumption is Rkg per minute. it is given by R=10+ 10/2t+1. a) Sketch R as...

Can a capacitor be used to fuel the electrolysis process?

Does anyone think anything will come from this? http://news.yahoo.com/s/ap/20070910/ap_on_sc/burning_seawater

Can anyone tell me if it is right to say that maximum power of a hydrogen oxygen fuel cell varies directly (with constant efficiency) with gas flow rate at constant pressure at room temperature

Let's assume we have a generic, standard design ICE car, except that transmission is CVT (continously variable) and can be popped into neutral, since this simplifies the problem. Assume car travels in a hypothetically-empty freeway at any speed and also assume that driver is optimizing fuel...

I was thinking. Now people plan to build factories to transform wood to liquid fuels. But why not run a motor on solid fuel. A diesel spread diesel to a fine particle dust so it burn faster and better. But you can get a explosion by sawdust. Is it not possible to get sawdust into the...

Hi! I'm django, new member. Right, I would like to talk about fuel cells. At first glance they are great, right! 99% fuel efficieny. But what most peopkle don't realize, is that although hydrogen might well be the most predominant element in the Universe, it is not available on Earth in...

hey guys can any1 tell me wats the concept behind cars using compreesed air as fuel...

http://blogs.reuters.com/2007/06/19/its-new-its-disgusting-and-it-fooled-an-oil-industry-group

I need help thinking of ideas for slides. I have "How it works", "benefits", "challenges", "Physics behind it", "Hydrogen vehicles", "Why Hydrogen", "What is a fuel cell", "Uses", "efficiency", "Fuel cell configurations". I can't think of anything else.

Check out this video. It looks like the future of this is very bright.

With the model, they can make tiny changes to the timing of the opening of both valves and ultimately optimize how engines run on alternative fuels. "The major issue right now is that we have all these vehicles on the road today that are 'flex fuel' vehicles," Shaver said. That just means...

Does anybody know what's the most recent alternative fuel that has come out beside Biodiesel pro types and Ethanol.Or what the efficiency rate of this fuel is?

When Ethanol is talked about as a fuel, it's the same exact molecule in alcoholic beverages, right? If that's the case, what is it about Ethanol that makes it preferable as a fuel to other alcohols? Is it just that we already have the capacity to ferment ethanol from sugars easily, or is...

Homework Statement An automobile has a fuel economy of 25mi/gal when combusting gasoline. If the engine is modified to burn pure ethanol, but the engine effeciency stays the same, what is the expected fuel economy? If the ethanol powered engine is 10 percent more efficent than the gasoline...

I need to do some head loss calculations for pumping diesel fuel or No. 2 fuel oil from a storage tank to an emergency generator. I see in many places that diesel fuel is specified to have kinematic viscosities of 1.3 to 4.1 cSt at 40C. However, under worst case scenarios, this fuel is likely...

The other day I took note of the fact that the U.S. does not recycle its spent nuclear fuel. This struck me as very wasteful. Could it be recycled at some later date? Will we run out of Uranium in 50 years, or can we simply dig deeper into the Earth to get more? There must be a large amount...

Hi How is it possible to tell if fuel (gas) is contaminated (by water / alcohols / oils etc)? Roger

Number of weeks back I was reading in Wikipedia on plot holes in movies, one of the mentioned plot holes is in an awful movie I'm going to do my best to avoid: Battlefield Earth. But I digress. The plot hole, among others, is aviation fuel spoils after a few years, so it would be impossible to...

:smile: Hi I did this simple calculation as a mature student in 1965 & now I need to prove my statement. 'In most hydrocarbon fuels the combustion of Hydrogen H2 gives about 90% of the toal heat' Eg Propane C3 H8 gives 50,350 KJ/Kg, H2 gives 141,790 KJ/Kg I know Carbon is a lump of black stuff...

Why is fire hotter when fueled by sulfur as compared to say, paper, wood, or charcoal?

I live in Saskatchewan, which has the world's largest and richest Uranium mines (producing 35% of the world's uranium from deposits as rich as 25%). But at present rates of extraction, the known reserves will last only 20 to 30 years according to the Cameco, the largest uranium producer. It...

I am doing a project and was researching some information and found this site and read some information as to what I am doing but it didn't have all the answers needed. I'm doing a project on egt readings and twin cylinder 2 stroke snowmobile engines. For example what effects higher or lower...

I am not sure why the Pebble Bed modular reactor (PBMR) is being touted as the great solution to problems with nuclear power. It uses a once through, virtually non-reprocessible fuel. It produces a high volume of waste consisting not only of the fuel but the casing/moderator which has about 50...

I read about incidences of fuel tank explosions in commercial airliners recently. (For example, this http://www.cnn.com/2006/US/07/14/twa.main/index.html" ). I'm aware of four incidences of fuel tank explosions on commercial airliners. All four were on Boeing airplanes. - The first was in...

I'm a physics student trying to do a project on fuels cells. One thing I don't get is, when the atom goes through the electr-- whatever, how does it separate into electrons and protons. I thought the only way to separate electrons from the nucleus is by extreme heat and pressure, like that...

So I'm starting to read up on some of this stuff on the internet but most the argument counterargument seems to be from the same sources Gold vs peak oil theorist. Is this debate so far concluded in academics that no research is being published in journals? What is the curret status of the...

Hey there , It's known that metalic U was uesed as a fuel in certain types of reactors. What I 'd like to know : 1-Which type of reactor use metalic Uranium ? 2-Is Uranium metal used nowdays as a fuel? 3-what are the disadvantages of using U as a metal beside reacting highly with water ?

i'm looking for help to a question that i have, i have tried every thing to find an answer to it. the qustion is "how would would an increase in fuel burned affect the PV daigram of a given engine. i belief it has to do with changing of the pressure and volume figures on the PV diagram. if...

What is the shelf life of jet fuel especial for JP-5? How to predict it? My homework ask me to write topic about this but I don't have any idea. Is that correct for the 4 years of the shelf life of JP-5?

hello every one while surfing i came across this site http://netmar.com/~maat/archive/feb2/carplans.htm it has some plans and drawings for adapting an ordinary petrol/gasoline engine to run on water i just started university as a mechanical engineer may be i will take this as a final...

was recently informed that the microbial stew in a termite's gut is the most efficient known transformer of cellulose to sugar. as sugar is the food source that ultimately results in our production of alcohol which can be used as alternative fuel, doesn't it make sense to synthesize the...

A rocket, mass m=4000kg, lifts off the ground vertically with acceleration of a=0.2g. The velocity of gass emmiting from it is u=1200m/s (with respect to the rocket). Find engine's reactive force and then fuel burn rate (mu). This is what i managed to do: rocket's speed at any moment t (with...