An atom travels at 1% of the speed of lgiht.  The deBroglie wavelngth is 3.31x10^-3 pm. What element is this?
964345
by using de broglies wave eqtn u can solve it\nthe eqtn\nwavelength=h/mv\n\nm=h/(v*wavelength) for one atom\nbut for 1 mole(avogadro no.(N) of atoms)\nm=h*N/(v*wavelength)\n\nnow v=3*10^7 m.sec^-1 (1% of speed of light)\nh=6.625810^-34 J.sec\nwavelength=3.31*10^-3*10^-12 meters\nN=6.023*10^23\n\nnow by substituting above values\nm=4*10^-2 Kg =40gr\n\nThis is the atomic weight of Calcium
639238
e=mc^2 \n(energy equals mass times the speed of light squared).
213411
Atomic Number 3\nhttp://www.jergym.hiedu.cz/~canovm/vyhledav/varianty/litva.gif
819588
number of atoms (of each element) on one side equals the other side.
465096
From memory (so you should double check it):\n\nRa = Rb Sqrt(1-(V/c)^2) \n\n^2 = squared\n\nRa=dilated time\nRb=reference time\nV= velocity\nc=speed of light\n\nSo this is one of the problems with luminal or superluminal travel. If v=c then Ra=0 no matter what Rb is.\n\nAnd if v>c then you get an imaginary number... what could that mean?
172336
I believe the answer is Osmium. He is asking for number of neutrons, not number of protons. Take the atomic mass, (Os = 190.23) And subtract the number of protons it has (Os = 76), giving you an answer of 114.
435346
10% of the speed of light is roughly 1,116,000 mph (186,000 mp/sec * .1 and then mult by 60).\nIt is roughly 1,796,000 kph.
800734
Speed of waves = wavelength X frequency of waves.
131141
Please edit your question to say what element you mean.  Same for the other one a few minutes earlier.
477007
energy = matter at the speed of light celeritas squared
798483
Here it is:\n\n(98,42)Mo + (1,0)n ---> (99,42)Mo
1122951
1 electron, 0 neutrons
588727
The equation E=MC2 is the derivation from Einstein's relativity theory. this is not a case of the classic mechanics. this equation explains the value of energy of an atom. \n\nE-> Energy\nM-> mass of the atom\nC-> speed of the light.\n\nin this only speed of the light is constant. the mass differs by frame to frame in accordance to theory of relativity. so the energy of the atoms also differs with frame to frame. but this equation is not fully correct and Lorentz had made corrections to it. \n\nAnybody who can prove this equation as a total wrong thing with strong evidences will be announced as the greatest of the universe..
608949
cant answer secifically, but you should be able to back calculte taking elements present today and using the half lives as your main variable.
1166463
1.  Physics trilogy: E=mc2, m=E/c2, c2=E/m.\n\n2.  All mass and energy forms are wave composites, having the value of "hf" as its basis.\n\n3.  Our physical composition is that of physical time, (c2=E/m) its duration being equal to the value of the chronon, or complete electron wave.  This value disallows travel to either ones own past or future.\n\n4.  If a premise is wrong, a right answer is wrong.\n\n5.  A person goes through life but one time.
777234
the wavelength will be speed/frequency=300000/100100000\n=0.002997002997002997002997002997003 kilometers \nin aproximation\n=2.997002997002997002997002997003 in meters\nor 3meters
928544
KNOWN:\nf = 3.2 x 10^-2 Hz\nc (ie speed of light) = 3.00 * 10 ^8 m/s\n\nFIND L (AKA wavelength)\nL m = c m/s  /  f Hz\n= 3.00 * 10 ^8 m/s  /  3.2 x 10^-2 Hz\n= 9 375 000 kilometers\n\nAre you sure its 10^-2 Hz? That seems unlikely