[SOLVED] metric problem

**>_<SHY_GUY>_<** · September 13th 2008, 12:30 PM

maybe im wrong or wrote the correct answer differently...

i put that there is 4.96 x 10^-7 tons in 4.5 x 10^2 kg. is that right?

and for a drive way that measures 20ft by 30ft, how much area does it cover in square mL... but i think its mm since the answer is 5.57 x 10^7. but even so..... i got 5.57 x 10^11...

i need help to see if im right or which is which...

**>_<SHY_GUY>_<** · September 13th 2008, 12:47 PM

sorry.

i came on another problem. the volume of a tank is 2.15 x 1.^5 cm^3.
how many gallons of water will it take it to fill it up?

how do you do that?

**11rdc11** · September 13th 2008, 12:47 PM

Use this conversion, it should help

$1000cm^3 = L$

**Moo** · September 13th 2008, 12:58 PM

Hello,

Originally Posted by >_<SHY_GUY>_<

maybe im wrong or wrote the correct answer differently...

i put that there is 4.96 x 10^-7 tons in 4.5 x 10^2 kg. is that right?

$1 \text{ ton }=907.18474 \text{ kg }$ (I know the tons in kg, I hope you were speaking of "short tons")

So $4.96 \times 10^{-7} \text{ tons }=907.18474 \times 4.96 \times 10^{-7} \text{ kg }$
So I don't think your answer is right.

and for a drive way that measures 20ft by 30ft, how much area does it cover in square mL... but i think its mm since the answer is 5.57 x 10^7. but even so..... i got 5.57 x 10^11...

Hmmm if L stands for Litres, then it is not possible since L is for volumes, not areas !

1 foot=304.8 mm. (we know that 1 foot=30.48 cm and 1cm=10mm)
So 20ft x 30ft=(20*304.8)(30*304.8) mm²=5.57*10^7

Originally Posted by >_<SHY_GUY>_<

sorry.

i came on another problem. the volume of a tank is 2.15 x 1.^5 cm^3.
how many gallons of water will it take it to fill it up?

how do you do that?

Okay.

I think you have a problem with the cm, mm, etc... meanings.

The standard unit is m (for meter)

Here is a table of correspondance :

$\begin{array}{c|c} \text{Power} & \text{Writing} \\ \hline 10^{-3} \text{ m} & \text{mm} \\ 10^{-2} \text{ m} & \text{cm} \\ 10^{-1} \text{ m} & \text{dm} \\ {\color{red}10^{0} \text{ m}} & {\color{red}\text{m}} \\ 10^{1} \text{ m} & \text{dam} \\ 10^{2} \text{ m} & \text{hm} \\ 10^{3} \text{ m} & \text{km} \end{array}$

remember that the same letters in front of m apply to litres and grams.

We know that 1 gallon = 3,78541178 litres

Now, remember that 1L=1 dm^3, that is to say $(10^{-1} m)^3=10^{-3} m^3$
or $1 dm^3=(10*cm)^3=1000 cm^3$

Try to do it

Originally Posted by 11rdc11

Use this conversion, it should help

$cm^3 = L$

No, it is dm^3

Edit : I must say I cheat a little since I'm in a country where we use these metric systems. On the contrary, it's a real difficulty if we travel to the USA

**>_<SHY_GUY>_<** · September 13th 2008, 01:00 PM

Originally Posted by 11rdc11

Use this conversion, it should help

$cm^3 = L$

ok the answer for that is 57.0 gal.

this is what i did, but i think i didnt mess up...

$2.15*10^5 cm^3/1 * 1L/ cm^3 * 1qt/0.946L * 1gal/4qt$

and i got this on my calculator: 56818.18182

**>_<SHY_GUY>_<** · September 13th 2008, 01:24 PM

Originally Posted by Moo

Hello,

$1 \text{ ton }=907.18474 \text{ kg }$ (I know the tons in kg, I hope you were speaking of "short tons")

So $4.96 \times 10^{-7} \text{ tons }=907.18474 \times 4.96 \times 10^{-7} \text{ kg }$
So I don't think your answer is right.

Hmmm if L stands for Litres, then it is not possible since L is for volumes, not areas !

1 foot=304.8 mm. (we know that 1 foot=30.48 cm and 1cm=10mm)
So 20ft x 30ft=(20*304.8)(30*304.8) mm²=5.57*10^7

Okay.

I think you have a problem with the cm, mm, etc... meanings.

The standard unit is m (for meter)

Here is a table of correspondance :

$\begin{array}{c|c} \text{Power} & \text{Writing} \\ \hline 10^{-3} \text{ m} & \text{mm} \\ 10^{-2} \text{ m} & \text{cm} \\ 10^{-1} \text{ m} & \text{dm} \\ {\color{red}10^{0} \text{ m}} & {\color{red}\text{m}} \\ 10^{1} \text{ m} & \text{dam} \\ 10^{2} \text{ m} & \text{hm} \\ 10^{3} \text{ m} & \text{km} \end{array}$

remember that the same letters in front of m apply to litres and grams.

We know that 1 gallon = 3,78541178 litres

Now, remember that 1L=1 dm^3, that is to say $(10^{-1} m)^3=10^{-3} m^3$
or $1 dm^3=(10*cm)^3=1000 cm^3$

Try to do it

No, it is dm^3

Edit : I must say I cheat a little since I'm in a country where we use these metric systems. On the contrary, it's a real difficulty if we travel to the USA

Well The US Keeps Saying That We Will Switch To Metric...Its Just Sad To See That They Keep Saying That

well the original problem is how many tons are there in 4.5 x 10^2 kg? and the answer is 0.496. but what i did was from 450 kg and convert to grams, to lbs, to tons... and i guess my answer is wrong...

i think my problem is that i quickly read the suffix of the unit and assume that is the number without reading what unit is below or above. i accidently put 1000 mm = 1 cm

and well its for chemisrty... and he only limits us to the units he gave us... but i will try

Merci Beaucoup Mademoiselle Moo

**>_<SHY_GUY>_<** · September 13th 2008, 01:26 PM

Originally Posted by 11rdc11

Yep it looks right

but apparently its not right... Moo informed me that is dm not cm...

but thank you for your help..

**Moo** · September 13th 2008, 01:32 PM

Originally Posted by >_<SHY_GUY>_<

but apparently its not right... Moo informed me that is dm not cm...

but thank you for your help..

And I'm sure it's dm not cm. If you take dm, you'll get the correct answer you're given

Originally Posted by >_<SHY_GUY>_<

Well The US Keeps Saying That We Will Switch To Metric...Its Just Sad To See That They Keep Saying That

well the original problem is how many tons are there in 4.5 x 10^2 kg? and the answer is 0.496. but what i did was from 450 kg and convert to grams, to lbs, to tons... and i guess my answer is wrong...

I don't know which tons you use...
There's a ton in my country we use as being 1000kg, but when i looked up in google, i found that a "short ton" is 904 kg.

i think my problem is that i quickly read the suffix of the unit and assume that is the number without reading what unit is below or above. i accidently put 1000 mm = 1 cm

then you should get the correct answer now !
it's 1000mm^3=1 cm^3

Merci Beaucoup Mademoiselle Moo

You are very welcome

**11rdc11** · September 13th 2008, 01:32 PM

Just looked up in my physics book and this may help you

$1m^3 = 1000L = 35.3ft^3=264gal$

Thanks for catching my mistake

**Moo** · September 13th 2008, 01:40 PM

Oh by the way, look at here for the powers of the meter : Metre - Wikipedia, the free encyclopedia

Litre - Wikipedia, the free encyclopedia

One litre is equal to 0.001 cubic metre and is denoted as 1 cubic decimetre (dm3).

Wikipedia explains it well

**>_<SHY_GUY>_<** · September 13th 2008, 01:40 PM

Originally Posted by Moo

And I'm sure it's dm not cm. If you take dm, you'll get the correct answer you're given

I don't know which tons you use...
There's a ton in my country we use as being 1000kg, but when i looked up in google, i found that a "short ton" is 904 kg.

then you should get the correct answer now !
it's 1000mm^3=1 cm^3

You are very welcome

well... i dont know if it clarifies it... but 2000 lbs = 1 ton thats what we use.

and i got the answer

i need to be more aware of the prefixes... and thank you for the table... it helps alot.

**>_<SHY_GUY>_<** · September 13th 2008, 02:14 PM

im still a bit lost.

how many tons in 450 g.

i did this.

450 kg * 1g/ 1000kg * 1lbs/454g * 1ton/ 2000 lbs.

but i get 0.000000496.

but the answer is 0.496... i dont get What Moo Was Saying Of A Conversion Related to this...

maybe im still doing it wrong

**11rdc11** · September 13th 2008, 03:16 PM

Check your conversion, 1kg = 1000g

**>_<SHY_GUY>_<** · September 13th 2008, 09:05 PM

Originally Posted by 11rdc11

Check your conversion, 1kg = 1000g

but isnt kg smaller than grams?

so 1 kg doesnt equal 1000g

**11rdc11** · September 13th 2008, 09:13 PM

Nope kg bigger than g

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