Science & Mathematics - 14 November 2007

Can you figure out this eqation??????????
1.A 'snooker' table (measuring 8 metres by 4m) with 4 'pockets' (measuring 0.5m and placed at diagonal slants in all 4 corners) contains 10 balls (each with a diameter of 0.25m) placed at the following coords:

2m,1m...(white ball)
...and red balls...
1m,5m... 2m,5m... 3m,5m
1m,6m... 2m,6m... 3m,6m
1m,7m... 2m,7m... 3m,7m


The white ball is then shot at a particular angle from 0 to 360 degrees (0 being north, and going clockwise).
Just to make it clear, a ball is 'potted' if at least half of the ball is in area of the 'pocket'

Assuming the balls travel indefinitely (i.e. no loss of energy via friction, air resistance or collisions), answer the following:

a: What exact angle/s should you choose to ensure that all the balls are potted the quickest?
b: What is the minimum amount of contacts the balls can make with each other before they are all knocked in?
c: Same as b, except that each ball - just before it is knocked in

2007-11-14 23:53:45 · 1 answers · asked by ng18 5 in Mathematics

1. what will the kinetic energy of an arrow having a potential energy of 50 J after it is shot from a bow?

also.

2. a boulder is raised above the ground so that its potential energy relative to the ground is 200 J. Then it is dropped. What is its kinetic energy just before it hits the ground?

thanks so much

2007-11-14 23:51:17 · 1 answers · asked by Anonymous in Physics

This is the title of a presentation my Engineering Geology professor wants me to give. From all the research I have done, I believe that it subduction does build mountains. But, I'm afraid I might be missing something here. Is there some debate going on right now in the geologic community about whether or not this is true? It seems geoLOGICAL to me, ha.

2007-11-14 23:50:40 · 7 answers · asked by Matthew 1 in Earth Sciences & Geology

2007-11-14 23:48:43 · 5 answers · asked by sonny 1 in Biology

i belive it is the jinns but why dont america just shoot down the flying thing in the air - they do have defence missiles waiting just in case a fighter jet comes into the country

its all a fake - but they do chat do jinns thats a kids game

2007-11-14 23:47:15 · 15 answers · asked by Anonymous in Astronomy & Space

1. Is there a 1-1-correspondence between the set of irrational nos. and the natural nos.? if so, how?

2. How would u construct a 1-1-c between Natural and Real nos?

2007-11-14 23:40:07 · 6 answers · asked by confused13 2 in Mathematics

Hi friends.
Do you know what causes emphases ripple marks?
I mean what's the reason?
You know that usual ripple marks are like this:
)---)---)
)---)---) --------> Current Direction
)---)---)
But emphases ripple marks are like this:
)-------)
----)----
)-------) --------> Current Direction
----)----
)-------)

???

2007-11-14 23:36:24 · 1 answers · asked by Anonymous in Earth Sciences & Geology

Explain how the vaccine work... Thanks!!! Add some useful info pls!! Thanks

2007-11-14 23:33:20 · 8 answers · asked by joyce o 1 in Medicine

2007-11-14 23:21:50 · 2 answers · asked by Anonymous in Physics

If we are given the co-ordinates of the circle and the radius, and the co-ordinates of the rectangle, then how can we prove that the circle and rectangle are over lapping?Java code appreciated!thanx

2007-11-14 23:12:59 · 3 answers · asked by the g 1 in Mathematics

2007-11-14 23:08:42 · 2 answers · asked by shin 1 in Physics

2007-11-14 23:07:46 · 11 answers · asked by Just Me 2 in Astronomy & Space

A cylindrical water tank 1.5 m high is filled with water

a) find the pressure at the bottom of the tank

b) if the cross-sectional are of the tank is 4m2. find the total force at the bottom.

2007-11-14 22:49:33 · 1 answers · asked by kC 2 in Physics

Bearing in mind that evolution has been proven why therefore do we still have nails on our fingers and toes if they were originally used as, say, talons to subdue and kill prey ?. We haven't needed them for for that purpose for centuries or even millenia.

2007-11-14 22:47:23 · 14 answers · asked by Milking maid 5 in Biology

assume no heat is lost to surroundings ; d of water is 1.00g/ml
I would appreciaste any help learning how to work these problems, even with a different prob set up thank you, I have a serious problem with setting these up

2007-11-14 22:40:07 · 1 answers · asked by HisGlory 1 in Chemistry

if you could design a fireworks display, what salts would you use and why?
where do you observe colorful light emissions? what do they have in common?

2007-11-14 22:11:20 · 2 answers · asked by kris 1 in Chemistry

2007-11-14 22:00:49 · 2 answers · asked by Anonymous in Mathematics

1) Prove that 3^(1/2) is a real number.
2) Prove that 3^(1/2), 5^(1/2), 6^(1/2) are irrational. Evaluate [2^(1/2)+3^(1/2)]^2 and deduce that 2^(1/2)+3^(1/2) is irrational.
3) Prove that p^(1/2) is irrational for any prime number p. Hence prove that n^(1/2) is irrational unless n is a perfect square. Hence show that n^(1/2)+m^(1/2) is rational if and only if both n^(1/2)+m^(1/2) are rational.

2007-11-14 21:55:17 · 2 answers · asked by David C 1 in Mathematics

2007-11-14 21:53:54 · 12 answers · asked by JUSTii :) 1 in Astronomy & Space

im gonna make this short and simple....because there were other descusions about this and i dont wanna repeat...
According to the Big Bang model, the universe developed from an extremely dense and hot state.....
when i think about it.... i say God doesnt exist...
but if someone asks why.. you dont have such a convincing thing to say.. other than experiments astronimers did...
my question: how did the nebula come to being..? from where did the clouds of dust come?
(im trying to convince my friend that God doesnt exist.. the problem is that everytime she asks me another good question.. i dont have an answer to it.. its kind of annoying that people get blinded by what they learn in religion class!)

2007-11-14 21:53:38 · 12 answers · asked by Anonymous in Astronomy & Space

2007-11-14 21:52:28 · 11 answers · asked by Anonymous in Astronomy & Space

years away'?

2007-11-14 21:50:34 · 7 answers · asked by Anonymous in Astronomy & Space

2007-11-14 21:46:36 · 6 answers · asked by Anonymous in Astronomy & Space

There are two racers with carrying a 3-digit-number each. The difference between the two numbers is 378, and the sum of all the digits in one number is 12, neither racer is carrying a number with a "0" on it. What are the two numbers they are carrying?
Show your work too, please!!!

2007-11-14 21:40:13 · 3 answers · asked by omgimcrazy 2 in Mathematics

2007-11-14 20:47:09 · 2 answers · asked by VIBDIN 1 in Other - Science

By providing a counterexample to one of the field axioms prove that the set of irrational numbers does not form a field.

2007-11-14 20:44:08 · 5 answers · asked by Anonymous in Mathematics

Please answer my questi0n because I am very curious.

2007-11-14 20:42:29 · 13 answers · asked by greizle 1 in Other - Science

thnnnnxxxxxxxxxxxxxxxxxxxxxxxxxxx

f(x) = –2x^8+8x^7+5x^6+5x^5

f '(1) =

2007-11-14 20:39:20 · 3 answers · asked by ? 1 in Mathematics

is it affecting our lifes, our horoscopes

2007-11-14 20:38:13 · 5 answers · asked by Tan Boon Hwee k 2 in Astronomy & Space

I've read about haunted places here in Minnesota etc. Just thought I'd see if anyone had any true ghost experinces they care to share.

2007-11-14 20:01:31 · 13 answers · asked by Death Girl Am 6 in Paranormal Phenomena