Any maths guru's out there?

[GeoffA]

Calculus is good if you have a good teacher, when I first learnt it in high school I really struggled, but in Yr 12 I got a better teacher and really got to like it.  The basic concept is rather simple, the way it is written (with all the different notations) is what makes it confusing.

I envy that you got hold of it Symon. For me, it was the one that got away, but we have computers now.
Anything I might need calculus for, I can draw/model.....much easier, and far more enjoyable.

[fishfinder]

wonder if there is a calendar with a simular format - it would take you three weeks to work out what day it is

[dales133]

Yep I hate math.
I know what I need for work but I'm numericly dyslexic.....If a whole bunch of numbers are thrown at me I just shut down lol.
Dosn't help my maths teacher in my formative years was a cock...thanks Mr Frederickson you tosser

[Mik01]

Here's another advanced formula for ya, I learnt as a kid in maths for dummies...

Punch these numbers into your calculator..
8008135

What does it spell?? 

[Garfish]

I always entered 5318008 and turned it upside down


Sent from my fingers via my brain

[prodigyrf]

So do you dig trig or is it all Greek to you? Surprising the number of tradeys who never appreciate how useful it is now we have tan sine and cosine at the touch of a calculator button rather than looking it up in tables or with slide rules. Trig is imperative for building and setting out.

[Mik01]

I always entered 5318008 and turned it upside down


Sent from my fingers via my brain

Only the eggheads in advanced maths knew THAT formula.

[Garfish]

Only the eggheads in advanced maths knew THAT formula.

With the old calculator 0.7734 used to work, because the 4 was displayed differently

[koshari]

Ha, even though I had very little exposure, hexadecimal was another form of  calculation that I never got my head around fully ..

Hex is really just a neater way to represent large binary numbers.

[Footy Shorts Shane]

You maths gurus might be able to help me

With regards to psi and in hg, is one a linear form of the other, but in an opposite form of pressure? (That doesn't make much sense does it )

Say if I had a mechanical force of 10 psi, applied to a valve, then added a 10 in hg vacuum to the same side of the valve, will this equal out zero?

Does that make sense?

Shane.

[Symon]

You maths gurus might be able to help me

With regards to psi and in hg, is one a linear form of the other, but in an opposite form of pressure? (That doesn't make much sense does it )

Say if I had a mechanical force of 10 psi, applied to a valve, then added a 10 in hg vacuum to the same side of the valve, will this equal out zero?

Does that make sense?

Shane.

By hg, I assume you mean mm of mercury (Hg).  If so then 10 mm of mercury is about 0.193 PSI, so no they would not cancel out and the valve would stay shut.  If you wanted the direct opposite for PSI it would be Torr, so 10 PSI applied to one side of the valve and 517.1 Torr pulling it down, would equal out to zero.

[GeoffA]

By hg, I assume you mean mm of mercury (Hg).  If so then 10 mm of mercury is about 0.193 PSI, so no they would not cancel out and the valve would stay shut.  If you wanted the direct opposite for PSI it would be Torr, so 10 PSI applied to one side of the valve and 517.1 Torr pulling it down, would equal out to zero.

That ^ is slightly at odds with your sig line Symon......

[neowatcher]

The calculation for the numbe 5 is specified incorrectly. The exclamation mark is placed underneath the square root symbol, so it actually reads

SQRT(9x8x7x6x5x4x3x2x1) = 602 (approx)

And not the intended

(SQRT(9))! = 3x2x1 = 6

[Symon]

That ^ is slightly at odds with your sig line Symon......

I thought it was pretty accurate actually

The calculation for the numbe 5 is specified incorrectly. The exclamation mark is placed underneath the square root symbol, so it actually reads

SQRT(9x8x7x6x5x4x3x2x1) = 602 (approx)

And not the intended

(SQRT(9))! = 3x2x1 = 6

Well spotted!

[Garfish]

You maths gurus might be able to help me

With regards to psi and in hg, is one a linear form of the other, but in an opposite form of pressure? (That doesn't make much sense does it )

Say if I had a mechanical force of 10 psi, applied to a valve, then added a 10 in hg vacuum to the same side of the valve, will this equal out zero?

Does that make sense?

Shane.

An inch of mercury is ~ .491 psi, you would need just over 20" of mercury to balance the 10 psi

[Footy Shorts Shane]

By hg, I assume you mean mm of mercury (Hg).  If so then 10 mm of mercury is about 0.193 PSI, so no they would not cancel out and the valve would stay shut.  If you wanted the direct opposite for PSI it would be Torr, so 10 PSI applied to one side of the valve and 517.1 Torr pulling it down, would equal out to zero.

Thanks Symon, but by in hg, I was referring to inches of mercury. Probably should have put inHg shouldn't I,   

An inch of mercury is ~ .491 psi, you would need just over 20" of mercury to balance the 10 psi

Thanks Garfish, that's exactly what I was after. 
That'll hopefully help me understand what's going on with a fuel pressure regulator I'm having some trouble with.

Thanks guys,   

(Next problem. Don't suppose you guys have any experience with boost referenced fuel pressure regulators on twin turbo big blocks with a blow through set up do you )

[speewa158]

RightO can we keep this thread in clear , simple Australian  so some can understand