Science & Mathematics - 11 July 2007

(a)When Charles's first child, John is born, Charles invested RM300 for him at 8% compound interest per annum. He continues to invest RM300 on each of John's birthday, up to and including his 18th birthday.What will be the total values of the investment on John's 18th birthday?

(b)If Charles starts his investment with RM500 instead of RM300 at the same interest rate, calculate on which birthday will the total investment be more than RM25000 for the first time.

2007-07-11 20:30:03 · 4 answers · asked by ♥JO the KrYpToN◄ 5 in Mathematics

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calculus problem involving water density and maximum values -- HELP!!?

Between 0degrees celcius and 30degrees celcius, the volume V (in cubic centimeters) of 1 kg of water ata a temperature T is given approximately by the formula

V = 999.87 - 0.06426(T) + 0.0085043(T^2) - 0.0000679(T^3)

Find the temperature at which water has its maximum density.

I know the answer is around 3 degrees celcius just because i remember it from physics but i dont know how to get the answer using calculus (max and min values)

2007-07-11 20:27:18 · 5 answers · asked by Anonymous in Mathematics

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Is gravitational force causing distant planet like neptune revolving arond sun is the greatest force ?

2007-07-11 20:22:17 · 2 answers · asked by chandrakant 1 in Astronomy & Space

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How loud is a nuclear bomb explosion?

2007-07-11 20:17:40 · 7 answers · asked by How To Save A Life 2 in Physics

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Differentiate this trig problem !! Help?

17 cos (x) sin (y) =12 I am clueless I just missed this on a test and had no clue how to do it!!

2007-07-11 20:13:55 · 1 answers · asked by Anonymous in Mathematics

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DOES ANYONE NO THE ANSWER TO THIS 5x + 1 = 21 ?

5x + 1 = 21

2007-07-11 19:56:20 · 26 answers · asked by Anonymous in Mathematics

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Is there a mathematical expression for this?

1, 3, 10, 35, 126, 464, 1716.

So this is a pattern. All distinct combinations possible with one one-sided die (1), All the combinations possible with two two-sided die (11, 12, 22), All the combinations possible with three three-sided die (111, 112, 113, 122, 123, 133, 222, 223, 233, 333), and so on.

2007-07-11 19:55:17 · 3 answers · asked by Rob 2 in Mathematics

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how do honeybees find their way back to the hive?

2007-07-11 19:49:54 · 5 answers · asked by swati_chhavi 5 in Zoology

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statistics question?

the mean and standard deviation of a sample of wages in a group of firms are estimated at $ 10500 and 200 respectively. later, it is found that a wrong wage of $ 8000 of one person was included in the sample instead of the correct $7000.please can you be able to find
a) the correct mean wage
b)the correct standard deviation

2007-07-11 19:43:06 · 2 answers · asked by Anonymous in Mathematics

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What's concentration of Perchloric acid?

I was brought a 1 L perchloric acid and it show a little information on the bottle. its said:

perchloric acid 65 %

so, I want to known the concentration of perchloric acid in this bottle please anyone Help me. and let me knwon how to calculate it.

thanks.

2007-07-11 19:39:30 · 4 answers · asked by impressiontick 1 in Chemistry

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Do fireworks look the same from every angle?

If I'm 300 feet from where a firework is launched and I see a perfect circle, if I go to where it was launched, turn 90 degrees and walk 300 feet would I see a circle or verticle line

2007-07-11 19:35:19 · 5 answers · asked by Mr. Dum Dum 1 in Physics

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Getting to Another Dimension?

Don't look at me like I'm crazy... :P
Does anyone know where I could find "plans" or instructions on getting to another universe or dimension or whatever? Websites or something? I know there's all kinds of stuff out there.
I really don't care if it's just some drunk guy in his basement telling me to put on a tin hat and spin around and click my heels three times. I want everything on it that I can get.
... actual information is also appreciated.

2007-07-11 19:34:14 · 9 answers · asked by Anonymous in Astronomy & Space

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If human bones were found with dinosaur tracks, how would you determine if they existed with the dinosaurs?

This was a question from a high school science text book. The answer they gave was claimed to be scientific, but was actually propaganda for evolution and was improper scientific methodology. They claimed that since the dinosaurs became extinct 65 million years ago, long before man appeared, these human bones could not have existed with the dinosaurs. You cannot prove a fact using a theory, you must use facts. What if the human bones were co-existent with the dinosaurs. This method would overlook this possability. An amazing discovery would go unrecognized. So how should a true scientist approach this discovery.

2007-07-11 19:31:21 · 9 answers · asked by Jeremy Auldaney 2 in Earth Sciences & Geology

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How to collapse the quantum wave function?

Can anything other than an observer collapse the quantum wave function?
Can the quantum wave function collapse on it's own?

2007-07-11 19:29:06 · 5 answers · asked by daviddepape 2 in Physics

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common name for collets-flower?

name of the flower-collets
i would like to know its common name

2007-07-11 19:29:03 · 1 answers · asked by jabeen_42@yahoo.co.in 1 in Botany

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Volume of Solids?

I need to find the volume formed by the region enclosed by:

x=3y and y^3 = x with y being greater than or equal to 0 about the y-axis.

I know I have to take the difference of the integral of 3/x from x^(1/3)

but after that, I have no idea what to do.

Similarly, I need to find the volume of the solid formed by rotating the region inside the first quadrant enclosed by:

y=x^4
y=64x

They're very frustrating because I have an idea of how to do them but, I don't really know how to apply the integrations.
AH!

2007-07-11 19:23:24 · 6 answers · asked by Anonymous in Mathematics

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found a new planet with water?

i just heard in the news that scientists have found a planet which they surely believe water is available.
apparently, its 60 lightyears far away from us...
where can i read more on it? send me some exact links plz.....
also would like to see some photos, if available

2007-07-11 19:20:37 · 12 answers · asked by sh 1 in Astronomy & Space

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We had an EARTHQUAKE in OREGON tonight...what did it measure on the RICHTER SCALE?

The earthquake was located near Canby Oregon just before 9:00 p.m. (PST) this evening (Wed).

Best Answer for the closest to the Magnitude on the Seismograph (Richter)....
AND A LINK TO THE SOURCE OF YOUR ANSWER.

2007-07-11 19:16:48 · 7 answers · asked by GeneL 7 in Earth Sciences & Geology

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How do you win the matchstick game?

You have between 14 and 28 matchsticks. You take turns with the computer taking 1, 2, or 3 sticks. You get the first turn. How do you win?

2007-07-11 19:14:00 · 1 answers · asked by what 2 in Mathematics

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Please if someone can help me with analysing motion -Physics-Year11-Please HELP ME?

I will e-mail the person with the material he must to help me ( Please if you can help me )

2007-07-11 19:10:46 · 1 answers · asked by seksi_mace 1 in Physics