1.Distinguish between atomic physics and nuclear physics? 2.Briefly describe the Bohr model of the atom. What is Bohrs 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 ...
November 6, 2007
The higher the energy level occupied by an electron in the hydrogen atom, the larger the atom. The diameter of the atom is proportional to n2, where n=1 labels the lowest, or ground state, n=3 is the third state, and so on. If the atoms diameter is 1x10-10m ...
November 6, 2007
1.How can you easily increase the magnetic field strength inside a current-carrying coil? 2.What is a magnetic domain? What is the difference between an ordinary iron nail and a permanent magnet? How does the idea of magnetic fields arising from circulating currents relate to ...
November 2, 2007
a high speed sander has a disk of 2.74 cm in radius that rotates its disks about the axis at a constant rate of 503 rev/min. determine the linear speed of a point 2.33 cm from the disk's center. answer in units of m/s
October 18, 2007
How does one Coulomb of charge compare to the charge on an electron? How do you think such a large difference arose historically? i got that the have the same mass and charge. i didnt understand the second part
October 16, 2007
Physics HELP PLEASE
two spherical objects are separated by a distance of 9x10^-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object ...
September 18, 2007
At time = 0 an automobile already traveling at 30 km/hr. accelerates at 3m/s2 for 2 seconds. During these two seconds, how far does it go? i still cant get this one right. i think im not doing the formula right
September 2, 2007
to kill a mockingbird
why does tom robinson escape from prison knowing that he will face an appeal? Please Help This site will help you with that question: http://www.sparknotes.com/lit/mocking/
April 4, 2007
does anybody know what the slope of 20,1 7,-19 Four numbers do not define a slope, unless you consider them as two pairs of (x,y) coordinates. Please be more precise about what you are talking about
March 28, 2007
WAVE CALCULATION QUESTION URGENT!!!!!!!!
Convert 8.6 x 10^13 Hz to nanometers. Assuming this is a light wave, Frequency*wavelength= speed oflight jiko like question jiko know all. ;.)
February 21, 2007
Chemistry Periodic Trends
The electron affinities of the elements from aluminum to chlorine are -44, -120, -74, -200.4, and -384.7 kJ/mol respectively. Rationalize the trend in these values. Electron affinity is the energy absorbed (endothermic) or emitted (exothermic) by the addition of one electron ...
February 11, 2007
What contributions has France made to the world's culture?(Essay) Cheese. Perfume. Do you just mean now or throughout the centuries? This site may give you some ideas. http://en.wikipedia.org/wiki/High_culture This UNESCO site has a long list of the cultural sites of ...
February 11, 2007
You have 2 digits, 2 numbers, reverse digits and 54 if the difference and the sum of all is 10 I'm not clear what you're asking, could you clarify what the conditions are for us please? My grandson came home with the problem that he wrote out on a piece of paper. He ...
August 31, 2006