Science & Mathematics - 27 September 2007

2007-09-27 08:48:34 · 12 answers · asked by Angelique 2 in Physics

O.k. - here's the idea: An External Pulsed Plasma Propulsion engine is constructed in space. It's sole purpose is to get to Alpha Centauri as quickly as possible. It's sole payload is a device for taking images in all spectra of light (from radio, through visible, infrared, ultraviolet, etc.). Just send it there, and get some awesome data back.

I think present technology would allow us to build such a craft. I think I heard that such a craft could make it to Alpha Centauri in about 100 years. However, even in 20 years or so, we'd be able to get some tremendously groundbreaking images en route.

Should we build such a craft? Could we get it to go faster, so maybe it could make it to Alpha Centauri in 25 years?

2007-09-27 08:48:25 · 15 answers · asked by Anonymous in Astronomy & Space

2007-09-27 08:44:16 · 8 answers · asked by sony 1 in Biology

A 2.00 m tall basketball player is standing on the floor 10.0 m from the basket, as in Figure P3.58. If he shoots the ball at a 40.0° angle with the horizontal, at what initial speed must he throw the basketball so that it goes through the hoop without striking the backboard? The height of the basket is 3.05 m.

2007-09-27 08:41:44 · 2 answers · asked by Anonymous in Physics

only numbers

2007-09-27 08:37:45 · 3 answers · asked by Kristina H 1 in Chemistry

Is it osmosis?

2007-09-27 08:33:44 · 3 answers · asked by Bounded 3 in Biology

2007-09-27 08:31:37 · 3 answers · asked by nikki2ricki 2 in Mathematics

Integral from 0 - 1 : (10^x)
I am utilizing the evaluation theorem for attaining my answer.

2007-09-27 08:29:28 · 2 answers · asked by sleepthei 3 in Mathematics

It collapses to a diameter of 10,000 kilometers, and it rotating at 10 revolutions per second.

What is the speed in kilometers per second at the equator?

2007-09-27 08:27:44 · 7 answers · asked by Feeling Mutual 7 in Astronomy & Space

ok i want to prove something to some guys ok. so anyway this is what i need to ask. ok well everyone in the whole wide world has it. animals and humans too. ok it is a little packet inside ur body and it has a green liquid. ok it is supposidley said that if u get scared or mad a lot it can explode and that liquid goes around in your blood and u die in minutes. tell me some one if its true and if its green. i have seen it and the liquid is green. help me prove these guys wrong!!!!!

2007-09-27 08:23:41 · 8 answers · asked by *Princess* 2 in Medicine

What is the value of y?

2007-09-27 08:22:00 · 11 answers · asked by nikki2ricki 2 in Mathematics

How do you find the average value of sinx between two values of x. ie the average value of sinx between x=0 and x=pi/3

2007-09-27 08:21:27 · 4 answers · asked by eazylee369 4 in Mathematics

2007-09-27 08:19:01 · 3 answers · asked by Anonymous in Mathematics

2007-09-27 08:17:49 · 3 answers · asked by cieara m 1 in Zoology

Any picture too proof it or can there be no picture if it

2007-09-27 08:15:07 · 8 answers · asked by Ireqiredlotofhelp 1 in Astronomy & Space

A large piece of wood, of mass 80 kg, falls over a waterfall and into the drop pool below. It enters the pool travelling at 20 ms-1 and is then subject to an upwards acceleration of 12 ms-2 due to its buoyancy. How long does it take before it bobs to the surface of the pool?

2007-09-27 08:10:59 · 1 answers · asked by robinf1988 1 in Physics

2007-09-27 08:07:13 · 5 answers · asked by Anonymous in Biology

2007-09-27 08:05:58 · 9 answers · asked by your_dear_old_mother 5 in Astronomy & Space

How do you think the universe was created.. religious or non-religious beliefs can be used

2007-09-27 08:05:35 · 10 answers · asked by Anonymous in Astronomy & Space

2007-09-27 08:03:58 · 7 answers · asked by Anonymous in Mathematics

2007-09-27 08:01:14 · 4 answers · asked by saidg22 1 in Zoology

( ' × ' = Cartesian product ' ∩ ' =intersection }

How can these be proved

a) ( A - B ) × C = ( A × C ) - ( B × C )
b) A ∩ B = B - ( B - A )

(they are correct, right ?)
I didn't find any example that would prove them wrong.
What laws can I use to prove them right ?
Would be helpful if you could give me the steps needed.
Thanks.

2007-09-27 08:00:38 · 4 answers · asked by Anonymous in Mathematics

1) Neutralization occurs when an acid is combined with a base. Which of the following is an example of neutralization?
a) adding an acid to water
b) using an antacid to treat heartburn
c) washing hair with a low pH shampoo
d) making soap

2) Sponge toffee is made by mixing sugar, corn syrup, vinegar, and baking soda. The reason bubbles form in the sponge toffee is
a) corn syrup produces bubbles when heated
b) sugar and vinegar produce a gas that creates the bubbles
c) mixing produces the bubbles by bringing air into the mixture
d) vinegar and baking soda react to produce carbon dioxide, which forms the bubbles




Here are my answers :
1 - b
2-d


but im not sure.. and can someone please explain to me the process of Neutralization?
thank you so much!

2007-09-27 07:55:31 · 3 answers · asked by Anonymous in Chemistry

as a= (7,-2,-2)

2007-09-27 07:55:11 · 2 answers · asked by garrett m 1 in Mathematics

I need help with this question. Ok the question is.

Mr. Harris is planning to have a court yard area sodded. The sod comes in rolls that are 3ft long by 1ft wide. IF the courtyard measures 60ft by 50ft, which of the following represents the number of rolls of sod needed?

a. 60 x 50
b. 60 x 50 divided by 3
c. 60 x 50 x 3
d. (60 + 50) divided by 3
e. (60 + 50) x 3

Please help me with this question and exsplain to me how you the answer!
~Thanx

2007-09-27 07:54:43 · 8 answers · asked by Anonymous in Mathematics

Just wondering if a person thats not depressed nor anxious or anything of the sort, what would it do to them if taken on a regular basis?

2007-09-27 07:51:59 · 2 answers · asked by Neo 1 in Medicine

Does anyone know how to get the cation, anion and formula for calcium phosphate?

Thanks very much!!

2007-09-27 07:51:46 · 2 answers · asked by James 1 in Chemistry

If 45.5 mL lead(II) nitrate solution reacts completely with excess sodium iodide solution to yield 0.540 g precipitate, what is the molarity of lead(II) ion in the original solution?

2007-09-27 07:51:40 · 2 answers · asked by ronnie c 1 in Chemistry

According to wiki:
http://en.wikipedia.org/wiki/Normalizing_constant

The denominator of the Bayes theorem formula should be the probability of producing the data, but on its own is difficult to calculate. So how come it's difficult to calculate? And why can't we calculate it by finding the joint priori probability of the evidences?

Please refer to my another question:
http://answers.yahoo.com/question/index;_ylt=AmcLvBNJBUk31tqpMNlK1BDsy6IX;_ylv=3?qid=20070927031725AAAfbNB

I have been stuck in this denominator for a few weeks, please help.
Thank you very much. (don't give me advertisements)

2007-09-27 07:51:33 · 2 answers · asked by I need answers 1 in Mathematics

Which set of 6 numbers is most likely to come up in Lotto?

A. 32 12 23 7 15 3
B. 1 2 3 4 5 6 7
C. The chances are equal.

2007-09-27 07:48:13 · 10 answers · asked by Feeling Mutual 7 in Mathematics