Home » Archimedes archive » Acorn User » AU 1997-01 B.adf » Regulars » StarInfo/Allen/!Ignotum/Formulae/Formulae/Atom
StarInfo/Allen/!Ignotum/Formulae/Formulae/Atom
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Acorn User » AU 1997-01 B.adf » Regulars |
| Filename: | StarInfo/Allen/!Ignotum/Formulae/Formulae/Atom |
| Read OK: | ✔ |
| File size: | 04D4 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
# Physics > Atomic and Nuclear # New entries should take the form of: # Formula # Note 1 # Note 2 # Note 3 # Note 4 # Note 5 # Formula # Note 1 # And so on... # To fit snugly into the window, each line should be no longer # than 42 characters. # There is a limit of 25 formulas per topic. # Any notes should be made here, at the beginning and should # be preceeded by a hash (#). dN/dt=-kN For radioactive decay, where: N=number of radioactive particles t=time k=decay constant Note: dN/dt=change in N/change in t N=N0e^(-kt) For radioactive decay, where: N=number of radioactive particles N0=initial number radioactive particles e=2.718.., t=time k=decay constant T=ln2/k For radioactive deacy, where: T=half-life (s) k=decay constant Note: ln2=0.693.. E=mc� Einstein's formula, showing that mass and energy are interchangeable, where: E=energy (J) m=mass (kg) c=speed of light=3�10^8 m/s E=hf For photons, where: E=energy of photon (J) h=Planck constant=6.63�10^-34 Js f=frequency l=h/p For particles, where: l=wavelength h=Planck constant=6.63�10^-34 Js p=momentum of particle
00000000 23 20 50 68 79 73 69 63 73 20 3e 20 41 74 6f 6d |# Physics > Atom| 00000010 69 63 20 61 6e 64 20 4e 75 63 6c 65 61 72 0a 0a |ic and Nuclear..| 00000020 23 20 4e 65 77 20 65 6e 74 72 69 65 73 20 73 68 |# New entries sh| 00000030 6f 75 6c 64 20 74 61 6b 65 20 74 68 65 20 66 6f |ould take the fo| 00000040 72 6d 20 6f 66 3a 0a 23 20 20 20 20 20 46 6f 72 |rm of:.# For| 00000050 6d 75 6c 61 0a 23 20 20 20 20 20 4e 6f 74 65 20 |mula.# Note | 00000060 31 0a 23 20 20 20 20 20 4e 6f 74 65 20 32 0a 23 |1.# Note 2.#| 00000070 20 20 20 20 20 4e 6f 74 65 20 33 0a 23 20 20 20 | Note 3.# | 00000080 20 20 4e 6f 74 65 20 34 0a 23 20 20 20 20 20 4e | Note 4.# N| 00000090 6f 74 65 20 35 0a 23 20 20 20 20 20 46 6f 72 6d |ote 5.# Form| 000000a0 75 6c 61 0a 23 20 20 20 20 20 4e 6f 74 65 20 31 |ula.# Note 1| 000000b0 0a 23 20 20 20 20 20 41 6e 64 20 73 6f 20 6f 6e |.# And so on| 000000c0 2e 2e 2e 0a 23 20 54 6f 20 66 69 74 20 73 6e 75 |....# To fit snu| 000000d0 67 6c 79 20 69 6e 74 6f 20 74 68 65 20 77 69 6e |gly into the win| 000000e0 64 6f 77 2c 20 65 61 63 68 20 6c 69 6e 65 20 73 |dow, each line s| 000000f0 68 6f 75 6c 64 20 62 65 20 6e 6f 20 6c 6f 6e 67 |hould be no long| 00000100 65 72 0a 23 20 74 68 61 6e 20 34 32 20 63 68 61 |er.# than 42 cha| 00000110 72 61 63 74 65 72 73 2e 0a 23 20 54 68 65 72 65 |racters..# There| 00000120 20 69 73 20 61 20 6c 69 6d 69 74 20 6f 66 20 32 | is a limit of 2| 00000130 35 20 66 6f 72 6d 75 6c 61 73 20 70 65 72 20 74 |5 formulas per t| 00000140 6f 70 69 63 2e 0a 0a 23 20 41 6e 79 20 6e 6f 74 |opic...# Any not| 00000150 65 73 20 73 68 6f 75 6c 64 20 62 65 20 6d 61 64 |es should be mad| 00000160 65 20 68 65 72 65 2c 20 61 74 20 74 68 65 20 62 |e here, at the b| 00000170 65 67 69 6e 6e 69 6e 67 20 61 6e 64 20 73 68 6f |eginning and sho| 00000180 75 6c 64 0a 23 20 62 65 20 70 72 65 63 65 65 64 |uld.# be preceed| 00000190 65 64 20 62 79 20 61 20 68 61 73 68 20 28 23 29 |ed by a hash (#)| 000001a0 2e 0a 0a 64 4e 2f 64 74 3d 2d 6b 4e 0a 46 6f 72 |...dN/dt=-kN.For| 000001b0 20 72 61 64 69 6f 61 63 74 69 76 65 20 64 65 63 | radioactive dec| 000001c0 61 79 2c 20 77 68 65 72 65 3a 0a 4e 3d 6e 75 6d |ay, where:.N=num| 000001d0 62 65 72 20 6f 66 20 72 61 64 69 6f 61 63 74 69 |ber of radioacti| 000001e0 76 65 20 70 61 72 74 69 63 6c 65 73 0a 74 3d 74 |ve particles.t=t| 000001f0 69 6d 65 0a 6b 3d 64 65 63 61 79 20 63 6f 6e 73 |ime.k=decay cons| 00000200 74 61 6e 74 0a 4e 6f 74 65 3a 20 64 4e 2f 64 74 |tant.Note: dN/dt| 00000210 3d 63 68 61 6e 67 65 20 69 6e 20 4e 2f 63 68 61 |=change in N/cha| 00000220 6e 67 65 20 69 6e 20 74 0a 4e 3d 4e 30 65 5e 28 |nge in t.N=N0e^(| 00000230 2d 6b 74 29 0a 46 6f 72 20 72 61 64 69 6f 61 63 |-kt).For radioac| 00000240 74 69 76 65 20 64 65 63 61 79 2c 20 77 68 65 72 |tive decay, wher| 00000250 65 3a 0a 4e 3d 6e 75 6d 62 65 72 20 6f 66 20 72 |e:.N=number of r| 00000260 61 64 69 6f 61 63 74 69 76 65 20 70 61 72 74 69 |adioactive parti| 00000270 63 6c 65 73 0a 4e 30 3d 69 6e 69 74 69 61 6c 20 |cles.N0=initial | 00000280 6e 75 6d 62 65 72 20 72 61 64 69 6f 61 63 74 69 |number radioacti| 00000290 76 65 20 70 61 72 74 69 63 6c 65 73 0a 65 3d 32 |ve particles.e=2| 000002a0 2e 37 31 38 2e 2e 2c 20 74 3d 74 69 6d 65 0a 6b |.718.., t=time.k| 000002b0 3d 64 65 63 61 79 20 63 6f 6e 73 74 61 6e 74 0a |=decay constant.| 000002c0 54 3d 6c 6e 32 2f 6b 0a 46 6f 72 20 72 61 64 69 |T=ln2/k.For radi| 000002d0 6f 61 63 74 69 76 65 20 64 65 61 63 79 2c 20 77 |oactive deacy, w| 000002e0 68 65 72 65 3a 0a 54 3d 68 61 6c 66 2d 6c 69 66 |here:.T=half-lif| 000002f0 65 20 28 73 29 0a 6b 3d 64 65 63 61 79 20 63 6f |e (s).k=decay co| 00000300 6e 73 74 61 6e 74 0a 4e 6f 74 65 3a 20 6c 6e 32 |nstant.Note: ln2| 00000310 3d 30 2e 36 39 33 2e 2e 0a 0a 45 3d 6d 63 b2 0a |=0.693....E=mc..| 00000320 45 69 6e 73 74 65 69 6e 27 73 20 66 6f 72 6d 75 |Einstein's formu| 00000330 6c 61 2c 20 73 68 6f 77 69 6e 67 20 74 68 61 74 |la, showing that| 00000340 20 6d 61 73 73 20 61 6e 64 0a 65 6e 65 72 67 79 | mass and.energy| 00000350 20 61 72 65 20 69 6e 74 65 72 63 68 61 6e 67 65 | are interchange| 00000360 61 62 6c 65 2c 20 77 68 65 72 65 3a 0a 45 3d 65 |able, where:.E=e| 00000370 6e 65 72 67 79 20 28 4a 29 0a 6d 3d 6d 61 73 73 |nergy (J).m=mass| 00000380 20 28 6b 67 29 0a 63 3d 73 70 65 65 64 20 6f 66 | (kg).c=speed of| 00000390 20 6c 69 67 68 74 3d 33 d7 31 30 5e 38 20 6d 2f | light=3.10^8 m/| 000003a0 73 0a 45 3d 68 66 0a 46 6f 72 20 70 68 6f 74 6f |s.E=hf.For photo| 000003b0 6e 73 2c 20 77 68 65 72 65 3a 0a 45 3d 65 6e 65 |ns, where:.E=ene| 000003c0 72 67 79 20 6f 66 20 70 68 6f 74 6f 6e 20 28 4a |rgy of photon (J| 000003d0 29 0a 68 3d 50 6c 61 6e 63 6b 20 63 6f 6e 73 74 |).h=Planck const| 000003e0 61 6e 74 3d 36 2e 36 33 d7 31 30 5e 2d 33 34 20 |ant=6.63.10^-34 | 000003f0 4a 73 0a 66 3d 66 72 65 71 75 65 6e 63 79 0a 0a |Js.f=frequency..| 00000400 6c 3d 68 2f 70 0a 46 6f 72 20 70 61 72 74 69 63 |l=h/p.For partic| 00000410 6c 65 73 2c 20 77 68 65 72 65 3a 0a 6c 3d 77 61 |les, where:.l=wa| 00000420 76 65 6c 65 6e 67 74 68 0a 68 3d 50 6c 61 6e 63 |velength.h=Planc| 00000430 6b 20 63 6f 6e 73 74 61 6e 74 3d 36 2e 36 33 d7 |k constant=6.63.| 00000440 31 30 5e 2d 33 34 20 4a 73 0a 70 3d 6d 6f 6d 65 |10^-34 Js.p=mome| 00000450 6e 74 75 6d 20 6f 66 20 70 61 72 74 69 63 6c 65 |ntum of particle| 00000460 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a |................| * 000004d0 0a 0a 0a 0a |....| 000004d4
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