Fuel Definition and 580 Threads

Did I do this right? I'm relying on a formula the teacher gave us in class, without quite understanding it intuitively. So I'm just rewriting the formula to solve for my unknown and plugging in numbers. A sounding rocket launched from Earth’s surface is to achieve a final speed of 1000 m/s...

A 4350 kg rocket is traveling in outer space with a velocity of 126 m/s toward the Sun. It needs to alter its course by 24.8°, which can be done by shooting its rockets briefly in a direction perpendicular to its original motion. If the rocket gases are expelled at a speed of 2240 m/s relative...

In another thread we talked about converting to a durable economy that is not dependent on fossil fuel. Now flexibility on energy and mobility seem to be inverse proportional. In static plants you can use anything that's available. Cars are more limited although there is still a range of...

I am currently in first year engineering. I am doing a project on electronic fuel injection. The project requires as much physics incorporation as possible. I am just wondering if there is anybody who has some advise or ideas for me as far as "the physics of electronic fuel injection."...

Here's another fun one: A 20,000 kg rocket has a rocket motor that generates 3.0*10^5 N of thrust. At an altitude of 5000 m the rocket's acceleration has increased to 6.0 m/s^2. What mass of fuel has it burned? I've already found the initial acceleration to be 5.2 m/s^2, then I used this...

Is this fair? Full Story I know this forum is full of arguments over whether or not global warming is even taking place, but even if it can be proven that it is, and that it is largely caused by greenhouse gases, is it fair to sue a nation for that? What is the U.S. doing that 90% of...

Is it possible to create a structure where 1)water is electrolysed into oxygen and hydrogen 2)Hydrogen is burnt in the same oxygen obtained from step 1 3)This releases lot of energy and forms water 4)This energy can be used to rotate the armature of an electric generator 5)Electricity can...

http://www.nea.fr/html/pub/newsletter/2002/20-2-Nuclear_fuel_resources.pdf Also som interesting articles here: http://www.world-nuclear.org/info/info.htm

I've got a little question here. Basically we've got this guy named "B" driving a straight track with a high constant velocity u. His buddy, "C" on the side of the track measures B's fuel consumption to be dn/dt. Now C filled the tank with just enough gas to make it the distance of the track...

Maybe you, chemical people could answer my question. Imagine a fuel injector surrounded by a coaxial air stream. The fuel and air flow are parallel, coaxial and axisymmetric. Both fluids obey ideal gas equation. Let's consider steady and compressible flow, i.e, variations of \rho are...

I have a buddy asking if I can do this for his 300 ZX. I have checked and there is a programmable module available with software, but apparently some companies [one at least] are reprogramming the factory chip directly. Does anyone know where to get the code, or at least what values affect...

My chemistry book says it is impossible to use anything but hydrogen in a fuel cell, but does not say why. does anyone know why?

Had a little project a while back, created some 'coke bottle' rockets. The ideais simple, use compressed air to push out an incompressible liquid, water creating some thrust for the bottle rocket to fly into the sky. there are plenty of tutorials for making bottle rockets out there, but i...

Cassini has been flying around our solar system since 1997 and it still has years of flying to go. how much fuel does it have on board (or did have when it first set off) it can't be burning fuel all the time surely, it must use momentum for long journeys.

I was wondering if you could recommend an article that would explain a concept to me. That is: the drawback of fuel cells, reportedly, is that hydrogen is not readily available. However, I am wondering why it is that if the original idea of fuel cells came from reversing the concept that...

There is a scene in the movie The Day After Tomorrow in which the temperature over Scotland rapidly drops to -150 F. The fuel lines in three helicopters freeze almost instantly and the helicopters fall out of the sky. That didn't seem too plausible to me. If any of you work with such fuel lines...

Hey guys anyone have an idea for a hydrogen fuel cell. I was thinking about one in which a battery first is used to split water into h2 and o2 using electrolysis. And then the components can be combined to produce energy. Anyone have any other ideas or links? Thanks.

Does anyone have any hands on expierence with Hydrogen fuel cells used as the backup source on UPSs.

From what I understand about fuel cells, they generate power by influencing electrons to move themselves around an ion-conducting material to get to the other side. While the electrons make there way from one side to the other, they supply DC in the middle of there journey. But I am not quite...

Being fairly new to the whole fuel cell thing (or at least how it works), I have a couple questions. I have learned so far that Proton Exchange Membrane (PEM) fuel cells work using the following device and process: * Why must the hydrogen be combined with oxygen at the end of the process...

I am curious about whether water could be used as fuel. Water is H2O right. So if water is two molecules of hydrogen and one molecule of oxygen can thus hydrogen be used as a propulsion fuel and oxygen a burning agent?

Dont know if this is the right forum for this question, let me know if its not! Im designing a car and i need a 50 litre fuel tank. Can anyone tell me what the dimensions of the fuel tank would need to be?

I'm sure everybody has heard all the stories about high mileage carburators and the oil companies etc. But why has this problem not been solved? Approximately two thirds of the fuel we burn in our cars goes out the tail pipe. I've read that someone has used catalytic cracking to breakdown the...

The US has a lot of oil but much of the oil used is shipped in from the middle east. Gasoline and diesel are cheap in the US. Europe doesn't really have much oil; most of the oil is piped from the middle east. Gasoline and diesel are insanely expensive. If Europe is so much closer to the...

Were you guys and gals aware that WMDs in Iraq are no longer being sought with the fervor displayed at the start. Here is an article that gives one the feeling that this is so. http://www.sptimes.com/2004/01/11/Columns/Bush_s_deception_on_I.shtml

Does Mercury have properties that would permit its' use as a Fuel to power Spacecraft? Has this been done before or experimented with? If it is heated to its' vaporization point, what happens? I know it is highly poisonous but I have heard that it has a potential for use as "a" fuel.

Ok, I have tried to rationalize this problem, but I am stuck, I don't even know how to start! I know it has to do with kinetic energy though. When a truck goes from rest to 30 miles per hour, it uses one ounce of fuel. HOw many ounces of fuel does it use when it goes from 30 miles per hour to...

Recently read in an article that the fuel of the future was antimatter... My question is how would they contain antimatter to get it to react with only the matter that they wanted it to react with. You wouldn't be able to put it in a container, wouldn't it collide with the matter and completely...

[SOLVED] Can my fuel cell rust I just bought the THames and Kosmos Fuel Cell car and experiment kit. I used it to day and their is still a small amount of water left in the fuel cell. will this make it rust. here's a link to the car http://www.thamesandkosmos.com/store/fuelcell1.html...

Why do we not use a nuclear fuel instead of uranium that decays into stable elements? Why do we use uranium?