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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -




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Topic review (newest first)

2010-09-10 22:22:27

Hi Bob
Sorry for the delay, been a while since my last post.

Love it :---- houseboat smile

bob bundy
2010-09-08 06:08:06

Hi Dave

Your log fire reminded me of the following:



2010-09-07 21:31:42

Scientific notation, also known as standard form or in exponential notation, is a way of writing numbers, which can contain values for large or small to be easily written in standard notation decimal notation.Scientific was developed to easily represent numbers are either very large or very small.Sometimes, especially when you use a calculator, you can come up with a very wide range.

2010-05-31 19:23:56


2010-05-31 19:21:07


2010-05-31 19:20:35

Nope, no trips planned. So you had logs and logarithms. An extra week, sounds great.

2010-05-31 19:17:42

It was great, until I was literally handing my passport over to the baggage handler when a woman leant over and wispered in her ear. She then said that all flights from Corsica to UK we cancelled for at least a week. There was a huge panic and a run on the airline desk. Luckily we have a house over there, so we just went home and had an extended holiday.

Took Emma to the beach everyday and made sand castles, and studied logarithms in the afternoons. Log fires in the evenings. Very nice smile

You off anywhere this year?

2010-05-31 18:32:09


that's Exactly what you call them!!

I had forgotten he he . .

2010-05-31 18:26:10

How was Corsica!

2010-05-31 18:25:05


I see now.

Unit for Acceleration (m/s)/s

Derived units.

Cool, happy now smile

2010-05-31 18:03:50

Hi Dave;

That's the general way with experimental data. Although you can ask for decimal points too.

2010-05-31 18:02:12

Hi Bobby

Thanks for that, I didn't know about the accuracy. That's handy to know and makes sense too, kind of like Amdahls's Law for functions, although none of my tutors have ever mentioned it.

Just shows you that you should always consult others rather than taking one persons word for it.

2010-05-31 17:49:29

DaveRobinsonUK wrote:

How is it that s is -2 though kg is -1. Does it just denote that m/s is a ratio and kg is a definite unit?

s is -2 coz its meter per second squared (unit of acceleration).

understand it like this..

As you can see, it appears to be a ratio but is rather a "Rate of Change w.r.t Time"!

2010-05-31 17:08:52

Hi David;

Did you get the same units I did? 5.962 is 4 significant digits. Question is slightly off. You can never get more significant digits that than the least accurate input. In this case 9.8 is the least precise input with 2 significant digits. Therefore all rounding if I remember correctly is to 2 significant digits.

m/s is read meters per second.

2010-05-31 17:05:45

Hi Bobby and ZHero

Yes, I got

, it asked for the answer to 3d.p.

How is it that s is -2 though kg is -1. Does it just denote that m/s is a ratio and kg is a definite unit?

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