E3.16rdj7j
E3.16 or champion RDJ7J
You divide by 1,000. So, .55 milliseconds equals .00055 seconds.
Two compatible spark plugs for a Troybilt weed whacker that currently has a spark plug with a model number of 794 00055 is the Champion E3.16 or the Champion Spark plug RDJ7J. Both of these spark plugs will give your weed whacker the starting power needed in a replacement. You can buy them here http://www.mymowerparts.com/partdetail/1060/1042/10783.php
When using scientific notation, you shift the decimal place over until there is only one digit in front of the decimal place and count how many times the decimal moved. 55,000 would be 5.5x10^4 because the decimal moved over four spots to the left. If the number was .00055 then the answer would've been 5.5x10^-4 because the decimal moved 4 places to the right.
An isotope is identified by atomic number (element number or name), by mass number, and by atomic weight. The mass numberfor an isotope is listed as a leading superscript such as 29Si, which in this example is silicon containing 14 protons and 15 neutrons (a rarer but stable isotope of the element). Similarly the atomic weight is indicated by a superscript such as U235 , an isotope of uranium having 92 protons and 143 neutrons.The actual atomic weight is often expressed as a decimal number corresponding to the mass of the atom in "atomic units", where a proton is about 1.0072, a neutron 1.0086, and an electron about .00055 atomic units.
It's a tiny tiny tiny portion. The only problem with giving a number is that there areno numbers for the beginning or end of the electromagnetic spectrum. Although weknow the limits of the range of visibility, there are no physical limits to the full spectrum,so we don't have a precise numerical way to compare them.For round numbers, let's say that the visible range consists of wavelengths from 400 to 800 nanometers.That corresponds to frequencies between 375,000 and 750,000 GHz.And let's say that the spectrum extends from the bottom of the AM radio dial, up to the beginningof gamma rays. That range of frequencies is 0.00055 GHz to 10,000,000,000 GHz.There are two ways to compare the two ranges ... linearly and logarithmically.Don't get scared. I'll do it gently, and I guarantee it'll be easy to understand.Linearly:Visible range . . . 375,000 GHz bottom to top.Spectrum . . . 10,000,000,000.00055 GHz bottom to top . . . 26,6662/3 times as wide as visible rangeLogarithmically:Visible range . . . 375,000 to 750,000 GHz. . . double the lowest one once to reach the highest. . . one octaveSpectrum . . . .00055 to 10,000,000,000 GHz. . . double the lowest one 44 times to reach the highest. . . 44 octaves