Science & Mathematics - 29 July 2006

10 points ot the first person who can get the dBc (decible(as in sound)) rating for each of the following:
(1) F-16 Jet Engine
(2) 400 watt Sony stereo MHC-Gx450
(3) A person talking
(4) 12 guage shotgun w/ 1 oz slug
(5) 2-12" 1300 watt sub woofers
(6) Ford F-250 Utility Pickup

2006-07-29 10:09:06 · 3 answers · asked by Anonymous in Other - Science

A Bag contains 6 red Marbles, 9 blue marbles and 5 green marble. you withdraw one marble, replace it, and then withdraw another marble. what is the probability that you do not pick two green marbles?

2006-07-29 10:03:15 · 7 answers · asked by schoolboi_000 1 in Mathematics

it is a sideways oval and it has a slash through it.
0-but sideways /-exactly

2006-07-29 10:03:06 · 16 answers · asked by Anonymous in Mathematics

2006-07-29 10:02:03 · 5 answers · asked by sami_pickle_68465 1 in Weather

i always dream about this person for many days now and i don't know why. i don't think about him before i sleep but i do think about him during the day.. my dreams about him could happen in reality just like last night when i dreamed that he called me and we talked for a long time about a certain kind of book.....

2006-07-29 09:59:37 · 4 answers · asked by hapie_09 1 in Biology

Solve: 4/x² - 2x- 3 = [-x/x-3] [-1/x+1]

2006-07-29 09:57:46 · 4 answers · asked by sabrina s 2 in Mathematics

use multiplication to find the number of possible outcomes for a choice of black,brown,blue or white pants with a choice of a white,blue or red shirt [12,10,7 or 6?

2006-07-29 09:56:52 · 5 answers · asked by debora b 1 in Mathematics

2006-07-29 09:56:22 · 8 answers · asked by Jazzy B 1 in Biology

2006-07-29 09:56:18 · 6 answers · asked by spottedzebra 2 in Mathematics

If there is, then would not some of those other close-lying universes have an influence on the development of our own universe? Could not the eventual overlapping of universes have an effect on the longevity of our universe? Could not the additional mass added to our own universe by the penetration of foreign galaxies (from other universes) precipitate the contraction of our universe? And, would not the three-dimensional meeting of several universes mark the limits of expansion of at least one of them (perhaps the one that was stretched the thinnest) so that it would then start to contract? Would not this contraction then suck galaxies from other universes toward its center so that the resulting “big bang” would result in material from several universes being fused together and then spewed back out into space, resulting in an even diffusion of material throughout the universes of "the total universe?"
Thank you for your consideration on this matter.
Joe Conrad

2006-07-29 09:54:43 · 12 answers · asked by Joe Conrad 2 in Astronomy & Space

do you see any mistakes in this?
lets start with the probability of an event (any event) occuring,
we will call this probability p

then, it follows, that the probability of this event NOT occuring is (1-p)

probabilities of independent events multiply, so the chance that this event does not occur in N independent trials is (1-p)^n

and, then the probability that this event WILL occur in at least one of those N trials is 1-(1-p)^n


the interesting part comes now, when we set the probability of the event occuring to ZERO, but give it an infinite number of chances.
logic would tell you that if an event has zero probability-absoulutely no chance of ever occuring, then it will never happen, no matter how long you wait. it is impossible.

or is it?

Using the probability equations found above to calculate this strange scenario, you need to take the limit of the expression as p approaches zero and n approaches infinity. the equation becomes

2006-07-29 09:51:57 · 9 answers · asked by me 4 in Mathematics

2006-07-29 09:46:50 · 11 answers · asked by TommyTrouble 4 in Earth Sciences & Geology

This IS a trick question. But there is an answer to it.

2006-07-29 09:39:57 · 15 answers · asked by Kidd! 6 in Astronomy & Space

Sketch the graph of the function y = 3x^2 – 30x + 5.
What are the domain and range of the function?
What are the x-intercepts? Approximate to two decimal places.

a. domain = [–70, ∞); range = (–∞, ∞);
x-intercepts: points (9.97, 0) and (0.10, 0)

b. domain = (–∞, ∞); range = [–70, ∞);
x-intercepts: none

c. domain = [–70, ∞); range = (–∞, ∞);
x-intercepts: points (9.83, 0) and (0.17, 0)

d. domain = (–∞, ∞); range = [–70, ∞);
x-intercepts: points (9.83, 0) and (0.17, 0)

2006-07-29 09:39:14 · 5 answers · asked by Brandon ツ 3 in Mathematics

Sketch the graph of the function y = –(3/8)x^2 + 8.
What are the domain and range of the function?
What are the x-intercepts? Approximate to two decimal places.



ANSWERS:

a. domain = (–∞, ∞); range = (–∞, 8];
x-intercepts: points (–4.62, 0) and (4.62, 0)

b. domain = (–∞, ∞); range = (–∞, 8];
x-intercepts: none

c. domain = (–∞, 8]; range = (–∞, ∞);
x-intercepts: points (–4.62, 0) and (4.62, 0)

d. domain = (–∞, 8]; range = (–∞, ∞);
x-intercepts: points (–1.63, 0) and (1.63, 0)

2006-07-29 09:37:09 · 6 answers · asked by Brandon ツ 3 in Mathematics

Solve: 4/x^2-2x-3 = [-x/x-3] [-1/x+1]
I have:
Step 1: 4/(x+1) (x-3) = [-x/(x-3)] [-1/(x+1)]
Step 2: 4/(x+1) (x-3) ÷ (x+1) (x-3)
Step 3: [-x/(x-3)] [-1/(x+1)] ÷ (x+1) (x-3)
Step4: 4 = [-x (x+1)] - [1(x-3)]
Step 5: 4 = -x² - 1x – 1x + 3
Step 6: 4 = - x² - 2x + 3
Step 7: x² + 2x + 1 = 0
Ok where did I goof up?

2006-07-29 09:30:10 · 4 answers · asked by sabrina s 2 in Mathematics

This time I'm not asking what is beyond but I'm asking what's the point of asking ourselves what is beyond the universe, what is out there ?

2006-07-29 09:26:26 · 5 answers · asked by Daffy 1 in Astronomy & Space

im so blessed i cant help putting god in every conversation

2006-07-29 09:18:12 · 10 answers · asked by bodylanguage19p 1 in Earth Sciences & Geology

which branch is better for ms in nano and for having wide options after graduation is eee better than tele as one is taught from bottom up so he knows all things and do univerisites give preferance to core bracnh liek ee over telecommunication in ms with same gre and gpa?pls help

2006-07-29 09:17:18 · 2 answers · asked by shivbhakta 3 in Engineering

2006-07-29 09:13:12 · 7 answers · asked by tak_np 1 in Physics

does drinking gallons of water before the test and niacin pills work????

2006-07-29 09:10:47 · 10 answers · asked by Jhaveri L 1 in Biology

2006-07-29 09:09:10 · 12 answers · asked by Anonymous in Biology

2006-07-29 09:08:19 · 5 answers · asked by Anonymous in Engineering

The first person to give the right answer gets the points.

2006-07-29 09:06:30 · 22 answers · asked by Anonymous in Mathematics

Since both male and female homosexuals do not procreate, they are not able to pass on genes that would ensure their survival. This would also mean that any mutation that would incline an individual genetically to homosexuality would not be passed on; and the chances of mass numbers of mutations occurring during one period of time are impossible. The only conclusion that one can draw from this is that homosexuality is sociologically and psychologically determined - do you agree?
Thank you for your help.
Joe Conrad

2006-07-29 09:05:40 · 19 answers · asked by Joe Conrad 2 in Biology

As the Laurentide Ice Sheet began to melt from its furthest point south in OH, PA, and NY, why did the melt water first flow to the Mississippi River and the Hudson River since the water does not do that now?
a.) The Great Lakes basins and the St. Lawrence River had not yet formed
b.) the Great Lakes basins and the St. Lawrence River were still filled with ice
c.) moraines and glacial debris blocked the water from flowing to the St. Lawrence when the glaciers first started to melt
d.) Sea level was 300 feet lower and this controlled the flow of the melt water

2006-07-29 09:01:06 · 2 answers · asked by erin h 1 in Earth Sciences & Geology

What is the direction of the longshore current? Also, at the end of winter why does sand connect some of the breakwaters to the beach?

2006-07-29 08:55:20 · 1 answers · asked by erin h 1 in Earth Sciences & Geology

2006-07-29 08:54:00 · 19 answers · asked by Anonymous in Physics

and why is it that we choose what we do and don't want to hear?

2006-07-29 08:50:26 · 9 answers · asked by angel777 2 in Earth Sciences & Geology

I am wanting to build robots as a hobby, for now. Where is the best place to start this new hobby of mine?

2006-07-29 08:49:18 · 5 answers · asked by tut22 1 in Engineering