Release Definition and 161 Threads

Is there a valve that can be set to open to let hot gas out at a certain pressure, and then close once the pressure drops back down? Edit: Sorry, I'm looking for a valve that will let the pressure build up to a high point, then open to release the gas until the pressure is released, then close...

Hello, A few questions which i could not find complete answers online (for a physics noob). I'll try and break them down here: // Comment: as for a good noob, i know nothing of the real calculation. // How do i calculate the amount of energy i will need to release as a LASER beam in order...

The binding energy per nucleon of each nucleus is as follows. 235 U : 1.2191 x 10^-12 J 92144 Ba : 1.3341 x 10^-12 J 5690 Kr : 1.3864 x 10^-12 J 36Use the data to calculate 1/ The energy release in this fission reaction( give your answer to 3 significant figures)The answer to the...

Wooooo, someone just unleashed a treasure trove of classified documents to the public about Iraq and Afghanistan. And the ****storm will begin right about...now.

hi, im not sure that this is the correct category, or even the correct forum, but I am sure someone will answer my question, i am intending to build an airgun, which uses a bicycle pump to build up pressure inside a treacle tin (hahaha), and i need a valve, so that when i have compressed...

This thread is intended to ask the question about potential future sources of energy to experts, explain a few things and generate discussion about the future of energy and it's possible uses. Nuclear power is great. But it requires a bulky apparatus and very specific materials. Perhaps...

Just a short concept question for understanding... I understand that a capacitor stores a charge, However I'm told that capacitors can be used to store up a charge and release it very quickly. How does this energy get released is what I don't understand. To my understanding of a...

Homework Statement which electron on annihilation will release more energy ,the one at rest or the one in relative motion Homework Equations The Attempt at a Solution

The following link gives the press release. http://press.web.cern.ch/press/lhc-first-physics/ Are there links to the papers that will be published? Will they come from different centers or from CERN? Will Physic forums use one thread to gather that info? jal

Homework Statement In figure A, the coefficient of friction between block A and the tabletop is 0.3, Mass of block A= 30 kg, Mass of block B=20 kg. How far will block B drop in the first 3 s after the system is released from rest? here is the figure :D...

Say you have a space elevator 47000 km* long (well past the point where centripetal acceleration cancels out gravity) There is a vehicle traveling up the cable with a pretty high velocity, and instead of braking it just shoots off the top. (assume the counter weight allows this) At the...

I understand why Fusion releases energy.. The product is "lighter" than the reactions and the missing mass is converted into energy (like gamma radiation). This energy can also be called binding energy as it acts to stabilize the atom Now, why would FISSION RELEASE energy? Wouldn't energy...

http://www.foxnews.com/story/0,2933,355509,00.html I know we have some UFO buffs here right?

I know that a Hypernova release two huge jets of gamma rays, but I'm not real sure on how they are formed. Also it was mentioned that by following the burst of gamma rays, we're looking back in time. How is this actually possible. I have a shaky grasp on the idea.

Hi, I’ve recently come across brushless motors and their use in rc cars. The motor can supposedly bring a power of over 1000 Watts using for example NiMH batteries. BUT on those packs I read like say 2500mah, 12V , 5 AMPERE. Can an NiMH battery really release around a 150A current? If so can...

In atomic decay, when an atom decays and releases the (Alpha) Helium nucleus, the atom left behind changes to the element 2 Proton Numbers prior. So is this new element charged? because the electrons stay behind, or do they go? and if so, where to and how?

I know that anything with mass has a conserved energy within it. In that sense, wouldn't it be logical to say that even a paperclip could destroy a city in America (since c is such a huge number.) So in that case, how do you release the energy? *note: I'm not trying to destroy the world, I...

I have a problem when calculating the temperature drop after a pressure release in a water sample. I use the following expression for the adiabatic temperature change: (delta T/delta P)= alpha*T*V/Cp where alpha is the thermal expansion coefficient, T is the temperature in Kelvin, V is the...

Okay guys, i have a significant amount of CO2 i can release into the atmosphere, how much will you pay me not to. PS, there is no way you will find me.

First of this is not an homework question but just a bit of a theory i am having a bit of difficulty understanding. Secundly, hello! James Chadwick discovered neutrons by sending alpha-particles from a radioactive source to a beryllium-plate, and that plate then sent out neutrons. I don't...

Hi everyone, this is my first post on this forum. I hope you can help and maybe one day I can help some of you ;) Homework Statement I need to determine the constants of pendulum. Θ ( in radians) and Φ. I am given the length of the pendulum, 0.30m and the initial angle of release, 0.10...

Monday 4 August press release http://www.fnal.gov/pub/presspass/press_releases/Higgs-constraints-August2008.html ===sample excerpt=== Tevatron Experiments Double-Team Higgs Boson Joint CDF, DZero effort lands Fermilab in Higgs territory Batavia, Ill.--Scientists from the CDF and DZero...

http://www.esf.org/research-areas/physical-and-engineering-sciences/news/ext-news-singleview/article/europeans-unite-to-tap-early-universe-for-secrets-of-fundamental-physics-442.html this release reports on the European Science Foundation exploratory meeting held 27-29 March on ASTROPHYSICAL...

I am struggling with a recent chemistry lesson. Immediate help is needed and would be greatly appreciated. I know that we have to first find the limiting reagent, and then go on to determine the heat released in kiloJoules. Homework Statement How much heat will be released when 4.72 g of...

Hi All, I have a project and was hoping for some help here. I need to build a type of solenoid that will move a 3/4 inch diameter rod vertically about four inches and hold it there for a minute plus. This will have to be powered by a battery so energy use is a concern. I have an idea on how...

and what is the name of the Ca2+ binding protein that is believed to underlie Ca2+ regulation of transmitter release

A friend and i have been arguing for weeks initially starting when we were driving in hisi car and i had a small american football, i contended that if i were to throw it out the car window, at the point of release it would be doing the speed of the car + the speed of my throw relative to the...

Homework Statement A power plant releases 2,0 grams of Kr-85 into the atmosphere every day. At some point there's an equilibrium between what the power plant releases into the atmosphere and the decay in the atmosphere -> The decay in atmosphere is equal to 2,0 grams per day Calculate the...

Hello, I was wondering if there are any exothermic (or otherwise spontaneous) chemical reactions that release hydrogen, in which the reagents and products aren't strongly hazardous? I know of the reaction of alkali metals with water, but these produce strong alkaline solutions.. Perhaps one...

Hi, I have 2 pressurized canisters, both are 60 litres in size. Both are filled with 120 litres of ideal gas. Canister A is heated to 100 degrees celcius (373 kelvin) and Canister B is heated to 2000 degrees celcius (2273 Kelvin). Canister B will obviously expand more than Canister A...

Homework Statement A plane flies horizontally @ 299 m/s relative to ground. Altitude: 3450m, level terrain; neglect air resistance. 1: How far from the point vertically under the point of release does the object land (in meters)? 2: At what angle must the bomb be released so that it...

Does 1a type supernova release the same amount of neutrino as 2 type supernova?

Homework Statement Does flowing water absorb and release air? Homework Equations The Attempt at a Solution

Homework Statement figure attached: Uniform beam with mass M,is placed horizontally,pivoted about it's center on the beam there are two small masses m1 and m2,connected by a spring,the system is in equilibrium,and at t=0 the spring is cut,and m1 and m2 slide on the beam.(their speed is not...

http://news.yahoo.com/s/nm/20061206/sc_nm/blackhole_dc If this were the case as explained, wouldn't we be detecting in X-ray also?

Please help me with this question. Thank you. A 2.0 kg solid sphere (radius = 0.10m) is released from rest at the top of a ramp and allow to roll without slipping. The ramp is 0.75m high and 5.3 m long. Find Ktotal, Krot, and Ktranslation.

I know this is probably an easy question but - A 1.10 kg block is held against a spring of force constant 0.2 104 N/m, compressing it a distance of 0.34 m. How fast is the block moving after it is released and the spring pushes it away? If someone could just point me in the right...

during combustion which one releases more heat and what is the rationale behind it? is there a website with all the bond energies between each element combination?

I found this story posted by MK in the Earth forum and it seemed to me it provides excellent, documented support for the case made by some people that such methane releases may be responsible for the sudden sinking and, hence, unexplained disappearances of boats, in Bermuda Triangle type...

say an atom absorbs only a certain amount of energy. how long dose it take for the atom to release its obtained energy?

Gotta get this outta my system. Never mind me. Oh daaammnn! I`m sick to the stomach. What the hell is happening!? I can't sleep. I can't think about anything but her. She is at the moment my whole universe! My productivity is down to zero and I have so much to do [SIZE="1"](she'll pay for...

A small block of mass .5kg is released form rest at the top of a curved-shaped frictionless wedge of mass 3 kg , which sits on a frictionless horizontal surfces. When the block leaves the wedge, its velocity is 4 m/s to the right. Find the velocity of the wedge after the block reaches the...

It is going to be AWESOME! Have you guys heard his first single papa zao or something like that. He raps for well over 30 seconds straight. This guy has skills.

Question: "A pendulum with a length of 2.82m is released from an initial angle of 17.5 degrees. After 1100s, its amplitude has been reduced by friction to 5.30 degrees. What is the value of b/2m?" Word Done: A = A(initial)e^(-betaT) Basically I have done the problem on the basis...

You can find the newest version of Firefox at mozilla mirrors: http://www.mozilla.org/mirrors.html It will be official announced by tonight (US Eastern Time) Here is what you can find in this new release: * Automated update to streamline product upgrades. Notification of an update is...

why does the energy-liberating fusion process ends with the formation of iron and not heavier elements such as uranium?

Now that Tiger has been released Steve Jobs and Apple are focusing on the next version of OSX.

A thin uniform stick of mass m with its bottom end resting on a frictionless table is released from rest at an angle A to the vertical. Find the force exerted by the table on the stick at the moment of release. Express your answer in terms of m, g and A. Ive been reliably informed (from the...

The electron, having been held at height h0, is now released from rest. Calculate its speed v when it reaches the top plate. I found the initial energy to be: -q_e*E*h_0 and the final energy to be: 1/2*m*v^2+-q_e*E*h_1 And I need to solve for v, so I set the two equal to each...

Well, BSing about politics with random people on the internet/real life since last fall has been fun, but it's about to come to a climax and FINALLY be over. I'm going to be so grateful when all this nonsense finally ends, all I can hope for is that it at least ends on Nov 2. I don't know...