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Measurement conversion?
Ok first off I have a physics class and right now I somewhat get 25% of what we are learning now. It's something like converting measurements, here's an example: Convert 4.6m into km and one's like 2.1x10 to the sixth power and turn that into a differnt kind of measurement. There was an example of how it was done but it wasn't very helpful to me cause I need like full detail of how it's done. Does anyone know a site or can anyone tell me STEP BY STEP how to do those?
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symbol|prefix|multiple|move decimal
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k kilo 1000 ←3
h hecto 100 ←2
da deca 10 ←1
m meter, g gram, L liter 1
d deci 0.1 →1
c centi 0.01 →2
m milli 0.001 →3
You need to memorize that chart. To convert from meters to da, you move the decimal point one to the left. To convert from da to k, you move the decimal point 2 to the left. To convert from k to m, you move the decimal point 6 to the right. To convert from d to m, you move the decimal point 1 to the left. If you're moving up the chart, the decimal is going left, if you're moving down the chart, the decimal is going right.
If there isn't a decimal point shown on a number, you put it at the very end. 50000 becomes 50000.0.
400 meters to decameters. Move the decimal one to the left: 40.0. The answer is 40 decameters.
7000hm to dm. Move the decimal 3 to the right: 7000000dm. (If you move the decimal to the right and there is nothing there, create a zero).
1313cL to kL. Move the decimal 5 to the left: 0.01313kL.
Simplify 343300kg. Make it into the lowest unit you can without making it a decimal. You want to move it 5 places to the left, so it will turn into cg. 3.433cg.(drop zeros at the very end of a decimal)
The other thing is scientific notation. 2.1x10^6=2100000.
4.11x10^5. It's the same as the conversions above, but instead of looking at the chart, just move it to the right by the power. So move the decimal point on 4.11 5 to the right: 411000.
2.15x10^-3. Move the decimal to the left instead of the right for negative numbers. So move the decimal point on 2.15 3 to the left: 0.00215
You can then convert the number normally, if you need to do that.
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