At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
\[125 cm^3 \rightarrow m^3\]
start with what you are given, and multiply that by ratios of 1, until you get the units you need
1cm is 1m x 10^-2 right?
just do the normal relationship between cm and m, then cube both
10^(-2) m = 1 cm cube both sides 10^(-6) m^3 = 1 cm^3
so 125 x 10^-6 m^3 ?
the cm^3 unit cancels from numeratior and denominator, so you cant mix up multiplying or dividing by the 10^-6, otherwise the units wont work
That is the general way to do any sort of unit conversion, and other things forget about the numbers till the very end, just start with the given, multiply by fractions of 1 so that the units cancel and move towards what you need, may take many more fractions than just 1 used here to change it over ... good luck
so it's 125 x 10^-6 m^3 ?
long as the units cancel out to leave the right one, the numbers should work themselves out, if you put each ratio value in right
|dw:1443322494095:dw| Oh ok what about 7.8 x 10^3 g/L to kg/mL? I tried it
do the "10^3" cancel out even if they aren't in the same unit?
Answer key says it's 7.8 x 10^-3 kg/ml
oh and the answer key for the first one says it's 125 x 10^-3 m^3 not 125 x 10^6 m^3, why?
yeah , that simple, i always just remember how each unit relates to the base unit, then you just have to remember one thing only, like for a mL 1 mL is 10^-3 L i always change the base unit to the other ones, easier to remember i think , maybe not
after you get the units right, all you have to do is multiply through all the top numbers, then divide through by all the bottom numbers to get the value
combine all the powers of 10, it simplifies down to 10^(-3)
oh yeah just saw what you typed above, yeah you can take care of all the constant numbers all at once , the unit it came from doesnt matter, just think of the unit as another term in the thing tha tis being multiplied to it's number, the thing is just a bunch of multiplication and division, you can do that in any order
ohhhh I see know.
Thank you! ^_^
yep, no prob
|dw:1443324302561:dw| I still have a question: I got 125 x 10^-6 m^3 but in my text it says I should get 125 x 10^-3 m^3 ?
think the book typed it wrong
if you think about mini cubes with sides 1 cm and a huge cube with side 1 m you will calculate that it will take 1 million small cubes to fill the large
Volume of both cubes at the time the small cm cubes fill the large m side length cube, 1m*1m*1m = 1 m^3 100 cm * 100 cm * 100 cm = 1000000 cm^3 a million cubic cm to fill a cubic meter or 1*10^6
Yeah it must be wrong, well it's not an actual textbook, it's a handout my teacher gave us. Like it must be a typo or something.
Did the same thing in the problem, except forget rememboring higher dimension relationships like cm^3 to another length ^3 Relate them in the 1 dimensional way, then cube everything
[1 cm] = [10^(-2) m] all you have to remember, or have a prefix chart 1^3*cm^3 = 10^(-2*3) m^3
Yeah I just looked at them and studied them. :) mili-10^-3, kilo-10^3, etc, etc. so useful! :D
If you are converting from some units like femptometer to Gigameter, take the given femptometer and convert to the base unit meter first, then convert from meter to Gigameter
i always do even for ones you can manually think how many powers apart they are
you good for now at least...?
i have a sheet somewhere of like 150 ratios of 1 separated into sorta subjects. mostly the English to SI factors
just kept keeping track