How much does gas weigh?

[dashtz69]

Per gallon? Just thought of this today, and didn't know thanks.

 

[DevilSperm]

Ive heard 8 lbs per gallon....ive never weighed it myself though

 

[crankbender]

Less than 8....thats the old "a pints a pound the world around" sang. This holds relatively true for heavier than water solids. Gas is something like 6.7 or so...depends a lot on temp.

46.81 pounds/cubic foot

probably isn't much use to ya tho so I will convert it out

1 gallon = 231 in^3
12^3 in^3= 1728 in^3=1 ft^3

sooooo

46.81*(1/1728)*231=6.25759 pounds/gallon

 

[98RedGs]

Originally posted by crankbender
1 gallon = 231 in^3
12^3 in^3= 1728 in^3=1 ft^3

sooooo

46.81*(1/1728)*231=6.25759 pounds/gallon

= Just 90% of the members that didn't take alot of math.

 

[crankbender]

Originally posted by 98RedGs
= Just 90% of the members that didn't take alot of math.

?

what do ya mean?

 

[98RedGs]

Originally posted by crankbender
?

what do ya mean?

Me = Ain't took/used math skills in a whiiiiiiiiiiiiiiile.
That just shocked me till I read it one or two times.
Then I had it just forgot the whole "^" thing.


Nothin offensive.

 

[crankbender]

the ^ (carrot) is used to denote something raised to a power.

for example in^3 means in*in*in which is a cubic inch.

2^3 means 2*2*2 = 8

even the new calculators all use the ^ symbol...speaking of which. What calculators do yall use? I still havn't figured out how to do all the programming on the `89. Nor used all the 10058794837501230q750971 built in functions.

For all the other old mathers out there. I donno when that became the way to write it but we didn't do it that way much back many years ago but EVERYTHING is written that way now. Hell they use that stuff on standardized tests instead of superscripting stuff because it avoids confusion.

 

[unlikely hero]

It weighs 6lbs a gallon. Trust me I know, I'm a pilot and we have to compute weight and balance every time we fly.
=Jason-

 

[crankbender]

Originally posted by unlikely hero
It weighs 6lbs a gallon. Trust me I know, I'm a pilot and we have to compute weight and balance every time we fly.
=Jason-

you are right...I forgot that math and science don't work when you deal with gasoline .

Jk man just bustin your balls. Aviation fuel is different than normal gasoline. That and most planes use the fuel as a heat sink (jets) so it is at an elevated temperature. Additionally they round off. I have had to do all that junk for the military and they don't use exact numbers because the load temp changes so much they can't get perfect no matter what. This is why all jets show usage in LB/hour not in gallons/hour.

 

[InferiorWang]

Originally posted by crankbender
the ^ (carrot) is used to denote something raised to a power.

for example in^3 means in*in*in which is a cubic inch.

2^3 means 2*2*2 = 8

even the new calculators all use the ^ symbol...speaking of which. What calculators do yall use? I still havn't figured out how to do all the programming on the `89. Nor used all the 10058794837501230q750971 built in functions.

For all the other old mathers out there. I donno when that became the way to write it but we didn't do it that way much back many years ago but EVERYTHING is written that way now. Hell they use that stuff on standardized tests instead of superscripting stuff because it avoids confusion.

I love my 89. It makes things so much easier in all this higher math I have to do. I swear I have found so many functions on there that I would have loved to have back in high school so I wouldn't have had to learn anything.

 

[white1997gs]

JP8 (Diesel) for C-17s idealy weighs about 6.75 lbs per gallon

 

[psychlow]

I loved my 89, before it quit working. The copy/paste features were the shit. I also loved the fact that it would graph 3D equations.

I blame my use of it to the degradation of my education, though - it was too easy just to punch in a number to factor it. So easy, in fact, I had completely forgotten how to do it by hand.

By the way, crankbender - speaking of too easy:
Type this into a google search:
"Cubic foot in gallons", or
"X cubic feet in gallons" OR
"pounds per cubic foot in pounds per gallon" OR
"46.81 pounds per cubic foot in pounds per gallon"
.....and see what you come up with

Another fun one is:
"yottameter in light years" or
"yottameter in AU"

And now, we return you to your regularly scheduled topic.

 

[Mitsu725]

I been told by 4 different master mechanics who had the same response gas weighs 7 lbs a gallon.

 

[out there]

on a seperate note, i have an 83+ that i never used many functions. why? i just can't see the point in taking extremely advanced math classes. don't get me wrong, i love learning, but algebra 2 pisses me off (as far as i went in school for math, unless you count chemistry). come on, how can you get a real answer using imaginary numbers??? riddle me that! /rant

 

[crankbender]

Originally posted by out there
on a seperate note, i have an 83+ that i never used many functions. why? i just can't see the point in taking extremely advanced math classes. don't get me wrong, i love learning, but algebra 2 pisses me off (as far as i went in school for math, unless you count chemistry). come on, how can you get a real answer using imaginary numbers??? riddle me that! /rant

Duh an imaginary number times another imaginary number is just -1.....doesn't that just make total sense?

If you hate algebra 2 don't go anywhere near Diffeq.

 

[out there]

yes, i realize that an imaginary number squared is -1, but the whole idea of an imaginary number is stupid. think about it, can you use an imaginary axe to chop down a real tree?

 

[crankbender]

Originally posted by out there
yes, i realize that an imaginary number squared is -1, but the whole idea of an imaginary number is stupid. think about it, can you use an imaginary axe to chop down a real tree?

It was suppose to be a joke

 

[dashtz69]

....

Hey crankbender, what's the derivative of...

3(cosX)^3-2(tan^2X)-4X+1

AND make use of it for any everyday purpose!

Man this Calculus crap is hard... just started integration... gotta love it...

Thanks to everyone who answered my question.

 

[bastarddsm]

Calculus sux. you just started integrations.....wait till you get to trig substitutions. have fun.

 

[thekellbeast]

Wait till you get to Calc 2. Sequences and series will own your ass. It's owning mine.

Oh and

http://pump.net/liquiddata/wdspecgrav.htm

gasoline 53.77 pounds per cubic foot.

7.481 gallons per cubic foot.

 

[leet]

So petroleum derivatives weigh less than water? Seeing as 1 gallon of water weighs 8.34 pounds.

EDIT: NVM I'm retarded. Just remembered that petroleum derivatives float on water.

 

[crankbender]

Originally posted by leet
So petroleum derivatives weigh less than water? Seeing as 1 gallon of water weighs 8.34 pounds.

EDIT: NVM I'm retarded. Just remembered that petroleum derivatives float on water.

!!!!!

dashtz69

The most obvious choice would be that the function describes the position of a point. The first derivitive is the instantanious velocity, and the second is the instantanious acceleration. However that curve is not continuous and therefore falls apart (Tan is only usable over an interval that does not contain an asemptope for this analysis). your answer is

-.15708(sin(x)cos(x)^5+25.4648cos(x)^3-6.3662E-14(x-.75)sin(x)(cos(x)^2+.4(repeating)sin(x))/(cos(x)^3)

assuming I am understanding your problem correctly. not sure what you mean by tan^2x....i just assumed it to be a misstype and tan^2(x) which is the same as (sin(x)/cos(x))^2 or tan(x)^2.....was it suppose to be tan(x^2)?

Seriously guys if you don't like integrals and derivitives you will have diffferential equations....

However stick with it engineering is fun as hell and it pays pretty good....

 

[crankbender]

Originally posted by thekellbeast
Wait till you get to Calc 2. Sequences and series will own your ass. It's owning mine.

Oh and

http://pump.net/liquiddata/wdspecgrav.htm

gasoline 53.77 pounds per cubic foot.

7.481 gallons per cubic foot.

Thats crude oil....look at the chart again gasoline is 46.81 on that chart

46.81/7.481=6.25....as I stated earlier (within roundoff errors anyway)

good try tho

 

[kpt4321]

Originally posted by crankbender
!!!!!

dashtz69

The most obvious choice would be that the function describes the position of a point. The first derivitive is the instantanious velocity, and the second is the instantanious acceleration. However that curve is not continuous and therefore falls apart (Tan is only usable over an interval that does not contain an asemptope for this analysis). your answer is

-.15708(sin(x)cos(x)^5+25.4648cos(x)^3-6.3662E-14(x-.75)sin(x)(cos(x)^2+.4(repeating)sin(x))/(cos(x)^3)

assuming I am understanding your problem correctly. not sure what you mean by tan^2x....i just assumed it to be a misstype and tan^2(x) which is the same as (sin(x)/cos(x))^2 or tan(x)^2.....was it suppose to be tan(x^2)?

Seriously guys if you don't like integrals and derivitives you will have diffferential equations....

However stick with it engineering is fun as hell and it pays pretty good....

Beat me to it.

I heart math.

 

[Defiant]

Hm. Glover's Pocket Ref shows gasoline to be 45.9 pounds per cubic foot.

Maybe it's .....wait for it.... LOW LEAD!!!!!

:laugh: :laugh: :laugh: :laugh: :laugh: :laugh: