Number of results: 103,450
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
1.Distinguish between atomic physics and nuclear physics? 2.Briefly describe the Bohr model of the atom. What is Bohrís key idea (involving matter waves) that makes the Bohr atom have discrete energy levels? I really didnt understand what they were wanting, so many of ...
Tuesday, November 6, 2007 at 10:53am by Will
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
Most of the questions you asked can be answered with a dictionary or any of the sources that a search engine would come up with. I recommend that you get the answers that way, because it will make you think about and remember the answers better. Question #3 requires more ...
Tuesday, November 13, 2007 at 8:57am by drwls
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
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
Thinking about the uses of radioactive isotopes, which statement is true? A. The iodine isotope, I-27, is used to diagnose thyroid disorders. B. Radiation may be detected because it ionizes the atoms it affects. C. Itís clearly understood that irradiating food kills bacteria ...
Thursday, June 24, 2010 at 8:56pm by Sadie
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
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/8301-30685_3-...
Tuesday, April 19, 2011 at 7:51pm by Ms. Sue
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 its ...
Sunday, May 8, 2011 at 3:14pm by Brian
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 has ...
Sunday, May 8, 2011 at 11:42pm by anonymous
this sso guy is nuts if he thinks we should be able to do this...
Sunday, May 8, 2011 at 11:42pm by john
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
I have a chemistry test that I need help with. My answers have stars by them Can someone please help me with the answers to this test??? Part 1 Ė Matter as Energy & Structure 1. When a pair of electrons is shared between two atoms, a covalent bond is said to have formed. Most...
Wednesday, July 20, 2011 at 1:52pm by Winona
* 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 is ...
Wednesday, November 2, 2011 at 9:26am by vamsi
should we produce more nuclear reactors or less of them?
Monday, December 5, 2011 at 4:45am by kim
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
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
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
Geography (Ms. Sue)
1). Finland might worry about nuclear power in Russia because, as Russia possesses a large amount of nuclear reactors, Finland is located closely in relation to Russia? 4). *Correction: How does male life expectancy in Russia differ from world trends?
Monday, October 14, 2013 at 4:32pm by Anonymous