Search: physics-nuclear reactors

Number of results: 95,217

Japan's Nuclear Crisis
I don't know why. Please help me. Why did the reactors at the Fukushima plant overheat? Because of Nuclear power generation?
Tuesday, April 19, 2011 at 6:28pm by Anonymous

physics-nuclear reactors
this sso guy is nuts if he thinks we should be able to do this...
Sunday, May 8, 2011 at 11:42pm by john

Socials
Nuclear reactors need to be cooled down. "the earthquake and tsunami knocked out the site's main electrical power supply and backup generators, making it hard to cool the nuclear fuel rods in the reactors and the cooling ponds nearby." http://news.cnet.com/8301-...
Tuesday, April 19, 2011 at 7:51pm by Ms. Sue

Organic and Nuclear Chemistry
Regarding nuclear reactions that release a great deal of energy, which statement is true? A. In a fission chain reaction, a uranium nucleus struck by a high-energy neutron emits two neutrons. B. Nuclear fission releases more energy per unit mass than does a fusion reaction. C...
Friday, June 25, 2010 at 11:13am by Demi

science
should we produce more nuclear reactors or less of them?
Monday, December 5, 2011 at 4:45am by kim

science
Try some of the following links for ideas: http://www.google.com/search?q=should+we+produce+more+nuclear+reactors+or+less+of+them%3F+&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a Sra
Monday, December 5, 2011 at 4:45am by SraJMcGin

Physics Ques.
In nuclear reactors, subatomic particles called neutrons are slowed down by allowing them to collide with the atoms of a moderator material, such as carbon atoms, which are 12 times as massive as neutrons. If the neutron has an initial speed of 1.0×107 m/s, what will be ...
Sunday, May 8, 2011 at 3:14pm by Brian

atomic energy
* Nuclear reactions release a million times more energy, as compared to hydro or wind energy. Hence, a large amount of electricity can be generated. Presently, 12-18% of the world's electricity is generated through nuclear energy. * The biggest advantage of nuclear energy...
Wednesday, November 2, 2011 at 9:26am by vamsi

Japan's Nuclear Crisis
http://www.google.com/search?q=+Why+did+the+reactors+at+the+Fukushima+plant+overheat&ie=utf-8&oe=utf-8&aq=t&client=firefox-a&rlz=1R1GGLL_en___US379 Read widely and take good notes.
Tuesday, April 19, 2011 at 6:28pm by Writeacher

physics-nuclear reactors
a) E = m c^2 here m = .05 grams = .05*10^-3 kg = 5*10^-5 kg c = 3*10^8m/s so c^2 = 9*10^16 m^2/s^2 so E = 45 * 10^11 = 4.5*10^12 Joules b) Force perpendicular to velocity gives centripetal acceleration F = m v^2/R so q v B = m v^2/R so v = (q/m) B R Ke = (1/2) m v^2 Ke = (1/2...
Sunday, May 8, 2011 at 11:42pm by Damon

AP Environmental Science (URGENT)
Strontium-90 is a radioactive waste product from nuclear reactors. It has a half-life of 29 years. How many years will it take for a quantity of strontium-90 to decay to 1/16 (one-sixteenth) of its original mass?
Wednesday, January 11, 2012 at 9:07pm by Heather

chemistry
yes; no; no; yes, sort of; let me amplify on the chain reaction. A power reactor controls the reaction. Nuclear decay produces energy (heat) that the steam generators need. So to get more energy, the reactors move contol rods such that fission causing neutrons are allowed to ...
Thursday, April 14, 2011 at 7:37pm by bobpursley

chemistry
Nuclear physicists do it usually, in very small quantities. Some element has to be bombarded with either neutrons, or protons, and these have to be captured by each nucleus. As you can imagine, it is not easy, some what like swatting flies with a pencil in the dark. Most ...
Thursday, October 30, 2008 at 12:54pm by bobpursley

physics-nuclear reactors
a) Let's assume a nuclear reactor was a completely isolated system, such that no matter particles can escape from it and the only thing that can get out is energy in the form of heat and radiation. If we weigh the whole reactor before switching it on, and again after it ...
Sunday, May 8, 2011 at 11:42pm by anonymous

Geography
When nonrenewable (energy) sources run out, we need to use other sources, or make the equivalent fuels out of renewable sources (like making biodiesel or running cars on pure alcohol). Renewable sources are things we can grow, or not use up, such as solar, wind, tidal and ...
Thursday, December 4, 2008 at 4:28am by drwls

Science
What is a nuclear membrane This is a biology question, not nuclear physics. You will find a definition at http://www.answers.com/topic/nuclear-envelope
Monday, September 18, 2006 at 6:31pm by John

LIB
The International Atomic Energy Agency (IAEA) 1. controls nuclear weapons stockpiles. 2. inspects nuclear power plants. 3. tests nuclear weapons. 4. builds nuclear power stations. I think it's number 4
Monday, May 10, 2010 at 9:45pm by tammy

Physics
Could someone help me to say this better? I have to Distinguish between atomic physics and nuclear physics, so here is what i have. which deals with the atom as a system of electron(s) and a nucleus and nuclear physics, which considers atomic nuclei alone
Saturday, November 10, 2007 at 7:41am by Amanda

Physics
I posted this earlier and no one responded so I am going to try again. I have to Distinguish between atomic physics and nuclear physics, so here is what i have. which deals with the atom as a system of electron(s) and a nucleus and nuclear phys
Tuesday, November 13, 2007 at 3:43pm by Amanda

Physics
Do today's nuclear power plants use nuclear fission, fusion, or both?
Friday, April 25, 2008 at 8:07pm by Lee

Physics check
Today's nuclear power plants use nuclear..... to generate electricity. fission?
Friday, April 25, 2008 at 8:16pm by Emily

nuclear physics
An atom of Radium-228 transmutes to radon-222. Write the nuclear equation for this decay.... How ??
Monday, May 28, 2012 at 9:42pm by Garth

Energy
Some forms of energy (notably oil) have already reached their maximum rates of production. The supply is being depleted faster than new reserves are found. Solar, tidal and wind energy will always be available. Breeder reactors (which make their own fuel from abundant U-238) ...
Thursday, March 26, 2009 at 1:40am by drwls

Math
Cooling towers for nuclear reactors are often constructed as hyperboloids of one sheet because of the structural stability of that surface. Suppose all horizontal cross sections are circular, with a minimum radius of 200 feet occurring at a height of 600 feet. The tower is to ...
Thursday, March 12, 2009 at 3:28pm by Vanna

Physical Science
Hello, Can soeone tell me if I have the correct answer? Thank You, My answer- A In a nuclear reaction energy is released by the combination of two elements into a new element. This process is an example of- A. Nuclear Fusion B. Nuclear Fission
Friday, March 7, 2008 at 7:05pm by Mandi

Geography
1-What is a benefit of nuclear power? 2-How does nuclear compare to coal? 3-What are some problems with nuclear power? 4-What does rector do? 5-What does a generator do? 6-What is the waste of these power stations, what is the problme with it? 7-What must be considered when ...
Wednesday, February 6, 2008 at 5:52pm by Dicle

Biology
In what part of mitosis does the nuclear membrane disappear? My book says that in prometaphase, "the nuclear membrane fragments", but when I looked online to verify this, I found some sources that said that nuclear membrane disappears in prophase, and some sources ...
Sunday, December 30, 2007 at 12:11pm by Jessie

physics
Are the nuclear fission power plants operating around the world today safe? How does the radiation from a nuclear power plant compare to other sources of radiation?
Thursday, September 16, 2010 at 7:45pm by Anonymous

chemistry
Which of the following statements are true? Fusion reactions result in nuclei with higher Z. To keep a nuclear power plant going, a chain reaction must be maintained. Nuclear fusion produces no long-lived radioactive by-products. The Sun is a nuclear fusion reactor.
Thursday, April 14, 2011 at 7:37pm by Grace

science
Well, ignoring nuclear reactions and escape from the atmosphere the total number of atoms does not change. If you are talking chemistry and not nuclear physics the answer is that number of atoms do not increase or decrease with time.
Monday, January 12, 2009 at 7:16pm by Damon

chemistry
Any help with the following questions would be greatly appreciated! 1) What is the fuel source in nuclear power plants? How is that energy harvested from the source? 2) How does the fuel source used in power plants differ from the fuel source used in nuclear bombs? 3) What ...
Tuesday, December 19, 2006 at 7:57pm by Tychicus

Physics
Before a nuclear reaction, there is 0.01000 kg of uranium. After the nuclear reaction, there is 0.00950 kg of uranium. How much energy was released? (h = 6.63 × 1034 Js)
Friday, June 1, 2012 at 3:58pm by Pat

LIB
The International Atomic Energy Agency (IAEA) is an international organization that seeks to promote the peaceful use of nuclear energy, and to inhibit its use for any military purpose, including nuclear weapons. copied from wiki 4. builds nuclear power stations. seems to be ...
Monday, May 10, 2010 at 9:45pm by Do

Chemistry
1. What is the change in atomic mass number when an atom emits an alpha particle? decreases by 2 *decreases by 4 increases by 2 increases by 4 2. If an isotope decays by the process of beta emission, ____. the mass number changes *the atomic number changes protons are given ...
Wednesday, May 1, 2013 at 10:43am by Anonymous

Science
what device in a nuclear power plant creates nuclear energy?
Tuesday, February 5, 2013 at 8:44pm by Anonymous

Japan's Nuclear Crisis
How does nuclear fission create energy? Nuclear energy is produced through the splitting, or fission, of a uranium atom in the core of a nuclear reactor. When hit by a neutron, the atom divides and releases two other neutrons, as well as heat and radioactive particles. The ...
Tuesday, April 19, 2011 at 6:26pm by Anonymous

Nuclear FIssion
How does nuclear fission create energy? Nuclear energy is produced through the splitting, or fission, of a uranium atom in the core of a nuclear reactor. When hit by a neutron, the atom divides and releases two other neutrons, as well as heat and radioactive particles. The ...
Tuesday, April 19, 2011 at 7:50pm by Anonymous

Chemistry
Atom-Particle that cannont be divided in half becasue it is in its smallest form. Reactants-Substances that exist before the reaction begins. Endothermic Reaction-take in, or absorb heat energy. Exothermic Reaction- Release Heat energy Inhibitor-makes a reaction slower. Rate ...
Monday, October 8, 2007 at 8:43pm by Tom

science
its probabaly a nuclear fission going on on nuclear reactor is perfect cho0ice..=)
Sunday, September 19, 2010 at 5:05pm by Hiba 92

Socials
Why did the reactors at the Fukushima plant overheat?
Tuesday, April 19, 2011 at 7:51pm by Anonymous

socials
for other event in 1960 i draw nuclear weapons and write beside as caption that many people thought nuclear war amounted to global suicide. or i write instead that Canada accept U.S Bomarc missiles that capable of carrying nuclear warheads and many people not like this ...
Tuesday, December 6, 2011 at 1:30pm by Mohammad

research paper
Does anyone know what arguments could come from nuclear energy? An argument for nuclear energy is that it is more efficient than coal or gas for generating electricity. There are more reasons in favor of it, of course. An argument against it is the question of what do we do ...
Tuesday, January 30, 2007 at 4:06pm by sam

science
_____ contain a fuel, rods to control nuclear reactions, and a cooling system. Would Nuclear reactor work??
Sunday, September 19, 2010 at 5:05pm by Katie

physics
By considering the nergy time uncertainity principle, estimate the range of the weak nuclear interaction at low energies. compare this range to the size of a typical nucleon for exapme a proton and therefore explain why the weak nuclear interaction between individual nucleaons...
Sunday, September 25, 2011 at 5:41pm by shumaila

Chemistry
The most abundant isotope of uranium,238U , does not undergo fission. In a breeder reactor, however, a 238U atom captures a neutron and emits two beta particles to make a fissionable isotope of plutonium, which can then be used as fuel in a nuclear reactor.Write the balanced ...
Wednesday, November 28, 2012 at 10:04pm by Anonymous

social studies
Nuclear weapons are proliferating as a threat against one's enemies. During the Cold War, the Soviet Union and the U.S. were each afraid the other would use nuclear weapons on it, so each nation built up their own arsenal of weapons. Today, a few nations are still fearful ...
Sunday, May 24, 2009 at 8:29pm by Ms. Sue

socials
I like "nuclear war amounted to global suicide." Or you could use: People divided about nuclear warheads in Canada.
Tuesday, December 6, 2011 at 1:30pm by Ms. Sue

chemistry
The strong nuclear force holds the nucleus together. Neutrons increase the effectiveness of the strong nuclear force in winning over the tendency of the electromagnetic repulsions of blowing the nucleus apart. A more detailed explanation would include quarks, neutrinos, the ...
Tuesday, November 4, 2008 at 6:26pm by GK

chemistry
What KIND of reactor and don't say nuclear. If a nuclear reactor we need to know what kind of nuclear reactor.
Saturday, October 20, 2012 at 4:16am by DrBob222

Chemistry
Describe nuclear fission and write a nuclear equation to describe the fission of U-235? Uranium-235 undergoes neutron-Induced fission to produce Xe-144 and Sr-90. Write a nuclear equation for the reaction. How many neutrons are produced?
Saturday, November 10, 2012 at 6:36pm by Nomi

chem
i am also having trouble iwth this one The atomic masses of barium-137, nitrogen-14, and titanium-48 are 136.905821 amu, 14.003074 amu, and 47.947947 amu, respectively. For each isotope, calculate the nuclear mass, the nuclear binding energy, and the nuclear binding energy per...
Tuesday, September 11, 2012 at 10:17am by hannah

Chemistry
Which of the following statements are true? Fusion reactions result in nuclei with higher Z. To keep a nuclear power plant going, a chain reaction must be maintained. Nuclear fusion produces no long-lived radioactive by-products. The Sun is a nuclear fusion reactor. I tried ...
Tuesday, April 19, 2011 at 4:36pm by Sue

Chemistry (PLEASE HELP)
"Nuclear fusion produces no long-lived radioactive by-products. " Perhaps it depends on wht you mean by 'long lived' and if only by-products from the actual fusion are considered. There are disposal considerations for radioactive waste from fusion. For info ...
Tuesday, April 19, 2011 at 7:58pm by DrRuss

physical edu
Catecholamines are stress hormones which are especially prevalent in Hot Reactors. is it False
Thursday, June 14, 2012 at 1:17pm by Andy

Japan's Nuclear Crisis
Here are some sites on nuclear fission: http://search.yahoo.com/search?fr=mcafee&p=how+nuclear+fission+creates+energy Sra
Tuesday, April 19, 2011 at 6:26pm by SraJMcGin

nuclear chemistry
A typical nuclear reactor produces 1mw of power per day. What is the minimum rate of mass loss required to produce this energy. Don't know where to start
Saturday, November 10, 2012 at 8:23pm by Nancy

Chemistry (PLEASE HELP)
Which of the following statements are true? Fusion reactions result in nuclei with higher Z. To keep a nuclear power plant going, a chain reaction must be maintained. Nuclear fusion produces no long-lived radioactive by-products. The Sun is a nuclear fusion reactor. I tried ...
Tuesday, April 19, 2011 at 7:58pm by Jamie

chemistry
Mass is lost or gains in a.) all chemical reactions b.) all nuclear fission reactions c.) all nuclear fusion reactions d.) all chemical and nuclear reactions my guess is B
Sunday, May 20, 2012 at 1:29am by ben

chemistry
name the type of nuclear reaction and name the nuclear symbol that is missing: 27Al13 + ? yields 30P15 + 1n0
Monday, January 18, 2010 at 8:22pm by mary

Cultural Diversity
I guess C or D could be a nuclear family- but- the question on my assignment was -- Which best describes a nuclear family?
Thursday, October 25, 2007 at 11:46am by Rose

soc 207
. The nuclear industry is placing ads in popular magazines and newspapers, claiming that nuclear power is environmentally friendly, since it doesn’t contribute to the greenhouse effect. How do you respond to that claim?
Sunday, July 10, 2011 at 12:48pm by tamika

chemistry
209 happens to be the only isotope of Bi that is not radioactive. It is also the largest stable nucleon of any kind. The reasons for is stability are quite complicated. Some attribute it a nuclear "shell model" and the fact that 126 (the number of neutrons) is one of...
Monday, May 12, 2008 at 3:02am by drwls

college chemistry
Atomic nuclear decay is fission (the breaking in two) of the nuclei of certain elements. It can be made to occur in atomic bombs and electric power plants. It also occurs in a few naturally occurring elements such as uranium, radium and thorium. Nuclear can be used for medical...
Wednesday, December 8, 2010 at 8:48am by drwls

Cultural Diversity
Let's look at B again -- a mother and child with no other family members nearby. Your text says that a nuclear family may be only a single mom and child(ren). It also goes on to say that nonmainstream families view a nuclear family in which the child is taken care of by ...
Thursday, October 25, 2007 at 11:46am by Ms. Sue

science
I dont know if there are only five. I have friends in biophysics, astrophysics, astronomy, high energy physics, condensed matter physics, nuclear energy, and physics education. Most engineering is applied physics.
Wednesday, August 29, 2007 at 8:17pm by Bobpursley

physic
They are man-made radioisotopes of heavy elements that are not part of the natural radioactive decay series that start with uranium or thorium. In other words, they only found on Earth if they were created in an accelerator, nuclear explosion, or nuclear reactor.
Tuesday, March 9, 2010 at 6:50am by drwls

Science
You'll find many ideas in these sites. http://www.thedailygreen.com/environmental-news/latest/nuclear-power-pro-con http://timeforchange.org/pros-and-cons-of-nuclear-power-and-sustainability http://nuclearinfo.net/Nuclearpower/TheBenefitsOfNuclearPower http://suite101.com/...
Wednesday, January 16, 2013 at 4:52pm by Ms. Sue

chemistry
One way in which atomic nuclear decay takes place?What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.
Tuesday, August 30, 2011 at 1:33pm by Boricua

Social Studies (France and nuclear arms)
what are some reasons that france have the right to nuclear arms? i know that in general it's for security and power but i dont know the specifics......
Monday, June 8, 2009 at 11:55pm by ellie

Biology
I am doing an essay about the nuclear envelope. However, I can't find very good information about the function of this organelle. For example, how does the nuclear envelope protect the nucleus?
Monday, March 17, 2008 at 4:57pm by Natalia

cultural diversity-reposted question
Please reread these parts of your text, especially the parts I underlined. Which scenario do you think best describes a nuclear family? The middle-class preference for relatively small nuclear families consisting of a mother,father(or a single mother), By comparison,the small ...
Saturday, October 27, 2007 at 2:31pm by Ms. Sue

chemistry
Discuss in detail, one way in which atomic nuclear decay takes place. What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.
Saturday, June 18, 2011 at 9:28pm by Jessica

Chemistry
Discuss in detail, one way in which atomic nuclear decay takes place. What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.
Tuesday, March 30, 2010 at 3:46am by Marlene

college chemistry
Discuss in detail, one way in which atomic nuclear decay takes place. What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.
Wednesday, December 8, 2010 at 8:48am by jane

Nuclear Physics
Oh noes
Thursday, February 3, 2011 at 1:58pm by terry

Nuclear Physics
Thank you so much!
Thursday, December 9, 2010 at 9:20pm by Raam

u.s.history
Why did the soviet union feel that it was necessary to place nuclear missile in cuba? In what Asian country did the u.s. place nuclear weapons that could fire on western Russia? What waas the significance of the u-2 flight? Why did Kennedy issue a quarantine instead of a ...
Tuesday, April 8, 2008 at 8:19pm by kevin

social studies
Check these sites. http://www.google.com/search?source=ig&hl=en&rlz=1G1GGLQ_ENUS410&q=iran+nuclear&aq=0&oq=Iran+nuclear
Monday, December 13, 2010 at 10:56am by Ms. Sue

family
Right. The nuclear family could include adopted children. My opinion is that a nuclear family would include same-sex parents.
Wednesday, February 15, 2012 at 6:23pm by Ms. Sue

8th grade science
Please note the spelling of "nuclear" and try some of the following links: http://search.yahoo.com/search?fr=mcafee&p=why+nuclear+waaste+products+are+a+problem Sra
Monday, October 11, 2010 at 3:52pm by SraJMcGin

physics
what has more predictable behavior, a proton or an electron, and why? a. an electron because of its smaller mass b. a proton because of its larger mass c. an electron because it doesn't feel the nuclear force d. a proton because it doesn't feel the nuclear force e. an ...
Tuesday, April 14, 2009 at 1:35am by Jess

nuclear projects
Construction of some nuclear device, such as a power plant, a processing plant, a weapons storage site, or a weapon. All of these used energy stored in the nucleus. Unfortunately, many more things are released besides energy.
Sunday, November 8, 2009 at 12:15pm by bobpursley

Nuclear Physics
energy= planck's constant*frequency.
Thursday, December 9, 2010 at 9:20pm by bobpursley

chemistry
I suppose in the sense that coal and oil pollute the atmosphere the answer may be nuclear fuels; however, in my opinion, nuclear fuels pollute also because something must be done withthe radioactive waste. Eventually I think all of them catch up with us.
Wednesday, February 29, 2012 at 12:52pm by DrBob222

physics
electricl energy is turned into light energy in a light bulb. electrical energy is turned into sound energy by speakers a nuclear reactor turns nuclear energy into electrical energy. What you could do is set up a 10x10 grid of the types of energy and try to come up with a ...
Sunday, December 19, 2010 at 8:02am by Dr Russ

physics
A) Both. Surprised? See http://www.redorbit.com/news/science/2080331/half_of_earths_internal_heat_comes_from_radioactive_decay/ Radioactive decay is a nuclear process that is important for the release of energy in the earth's core. In the case of the sun, the energy comes ...
Saturday, March 24, 2012 at 9:44pm by drwls

us history
The siting of nuclear power plants, nuclear and mixed waste facilities, and federal prisons would be obvious examples. Few localities want them "in their back yard". Major federal land use changes always require environmental impact studies with local input.
Tuesday, March 2, 2010 at 10:44am by drwls

physics
how do types of nuclear radiation differ in electric charge?
Tuesday, February 8, 2011 at 7:01pm by makayla

chemistry help!!
For each of the following pairs, indicate which element has the larger first ionization energy Mg or Al. i put Mg. Repulsion of paired electrons in Mg is more significant than Al's higher effective nuclear charge. but got it wrong. Al. Repulsion of paired electrons in Al ...
Tuesday, November 20, 2012 at 5:01pm by Samantha

French
ok, but in french there is no difference between nuclear and extended family nuclear and extended family=la famille
Saturday, February 9, 2008 at 1:13pm by mk-tintin

Social Studies (France and nuclear arms)
Why does the US have the right to nuclear arms? Right seems to be a political word, it means what the country asserting the right wants. Arms means: nuclear explosives. Arguing about this reminds me of Henny Penny. Everyone listened to Henny Penny's argument, but in the ...
Monday, June 8, 2009 at 11:55pm by bobpursley

History
What defense strategy was developed by the late 1940s because the US lacked sufficient troops to confront the Soviet Army in Eastern Europe? I think that the answer might be= B) nuclear deterrence, is this correct? A) atomic detente B) nuclear deterrence C) a combined NATO ...
Wednesday, March 23, 2011 at 12:21pm by David

Prime Minister
If you were Prime Minister Stephen Harper, what position would you take on the issue of nuclear power generation in Canada? I would just stop, and end the nuclear generations. It's better than dealing with risks, and entering the zone of danger. I need help. I dont really ...
Tuesday, April 19, 2011 at 7:28pm by Anonymous

physics
if The magnitude of the nuclear spinangular momentum of a nuclei is 15 /2 units. Then what will be the value of I
Monday, May 20, 2013 at 6:02am by kuldeep

Chemistry-PLEASE HELP!!!
Give a full balanced nuclear equation fro the synthesis of xenon-133. A full balanced nuclear equation includes α particles, β particles, positrons and gamma rays.
Friday, April 17, 2009 at 1:12pm by Matt

Honors Chemistry
nuclear charge = +12 1s, 2s, & 2p electrons = 10 +12-10 = 2 for the effective nuclear charge on the two 3s outside electrons
Wednesday, September 15, 2010 at 11:18am by DrBob222

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