Science & Mathematics - 16 August 2007

I would really appreciate some assistance on this problem. I can't seem to get the correct answer. Thank you so much!

You can obtain a rough estimate of the size o f a molecule with the following simple experiment: Let a droplet of oil spread out on a fairly large but smooth water surface. The resulting "oil slick" that forms on the surface of the water will be approximately one molecule thick.

Given an oil droplet with a mass of 9.03 x 10^-7 kg and a density of 911 kg/m^3 that spreads out to form a circle with a radius of 43.8 cm on the water surface, what is the approximate diameter of an oil molecule? Answer in units of m.

2007-08-16 10:40:50 · 5 answers · asked by sg88 1 in Mathematics

The veins are clotted blood, are you not suppose to unclot the blood?

2007-08-16 10:34:39 · 4 answers · asked by Eurasia 1 in Medicine

2007-08-16 10:34:36 · 8 answers · asked by aseel a 1 in Mathematics

y = x^2 - 2x - 15


For the above quadratic equation find:

a.The y-intercept.

b.The x-intercepts if possible.

c.The vertex.

d. The line of symmetry.

2007-08-16 10:34:33 · 6 answers · asked by Anonymous in Mathematics

1. How many solutions are there to the quadratic equation
2x^2+7x+12 = 0?

a. 2
b. 1
c. 0
d. 3

2. When the discriminant equals zero, or b^2- 4ac = 0, expect ___ root(s).

3. Find the discriminant for the following quadratic equation and use it to determine the number of roots or real solutions it has.

x^2 + 3x + 15 = 0

2007-08-16 10:32:27 · 2 answers · asked by Anonymous in Mathematics

Like when astronauts go to space, can they take a bag of small rocks, and hurl them at Earth, then, after a day or two, when the rocks enter the atmosphere, they burn up, and can be seen as a "meteor shower". Can this idea work? Why or why not?

2007-08-16 10:31:17 · 5 answers · asked by Anonymous in Astronomy & Space

Several years ago an astronomer Steven ??? proved his theory that the gravity wave cause by the moon and sun has an effect on triggering volcanic erruptions. In fact he could predict the intensity of the erruptions by the position of the sun and the moon. I believe the same gravity plays a signifcant role in triggering earth quakes. This gravity pulls at the earth magma and effect tides causing stress at the earth plates. Has anyone studied this?

2007-08-16 10:29:01 · 6 answers · asked by Kurt C 1 in Earth Sciences & Geology

2007-08-16 10:28:56 · 7 answers · asked by Anonymous in Mathematics

2007-08-16 10:28:16 · 5 answers · asked by ...Øяρh°° 3 in Astronomy & Space

In math

2007-08-16 10:27:44 · 4 answers · asked by Anonymous in Mathematics

2007-08-16 10:27:01 · 4 answers · asked by Kristin G 2 in Medicine

2007-08-16 10:24:43 · 6 answers · asked by Anonymous in Mathematics

Ok so we just learned conversion factors today and it looked easy and it is easy but I dont know what to do on the worksheet tonight
heres a sample problem

256 gal./min X ? = ? gal. / hour

2007-08-16 10:23:07 · 7 answers · asked by Anonymous in Mathematics

have there been so many accounts about encounters with them over the century? How is it possible that all these people report the same thing? And if it's just a houx, why did so many people give accounts of these encounters. I mean i just saw today over at Youtube this whole UFO interview thing that showed vids that claims to be an actual footage of an ET. Its like the more i know, the more i don't know. What is your take on this?

2007-08-16 10:23:01 · 22 answers · asked by Man 5 in Astronomy & Space

2007-08-16 10:21:37 · 7 answers · asked by Justin D 1 in Engineering

what two processes are the major sources of the earth's interior heat, which is the energy source for plate tectonic motion?

2007-08-16 10:20:47 · 5 answers · asked by Nicole 1 in Earth Sciences & Geology

Can someone please help me? "electric power"

16. What turns ratios would be required for transformers that change;

a) 20 000V to 500 000V (at the power station)

b) 500 000V to 11 000V (at a sub-station)

c) 11 000V to 240V (at a pole-type transformer)

this is what i have been trying to do, is it correct?

16a. 20 to 500
b. 500 to 11
c.

2007-08-16 10:17:16 · 2 answers · asked by ahahahaha 1 in Physics

First, I've been asked to graph multiple functions, 2 of which I cannot figure out how to graph or enter into a calculator for a general idea:

f(x)= log base 2 (x) ; f(x)= √(a^2)-(x^2) )

So if somebody could explain how to do this, or find a reference I can check out that would be awesome.

Secondly, Is there a relationship between symmetry in a function's graph and the function being even or odd?

Last, if a set of directions say to "Draw a reflection" of..sin(x) (for example), is that the same as regular graphing?

Thanks

2007-08-16 10:16:34 · 1 answers · asked by I Know Nothing 6 in Mathematics

Okay here is the problem anyone that can help explain it with the correct answer will get 10 points...Thanks

Here is the problem: Find the size of the angles in decimal degrees for the clock hand moving for the given time period for a twelve-hour clock. Answer should be exact.

a. hour hand in 4 hours
b. minute hand in 15 minutes
c. second hand in 55 seconds
d. hour hand in 45 mintues
e. second hand in 2 hours

2007-08-16 10:11:52 · 3 answers · asked by L J 3 in Mathematics

find the radius of a circle given by the equation x^2+y^2-2ax-2ay=0
I get a*sqrt2
but my book says sqrt(2*a)
I think it is wrong. what is your verdict?

2007-08-16 10:10:52 · 4 answers · asked by eazylee369 4 in Mathematics

2007-08-16 10:08:28 · 7 answers · asked by ♥xXEscape the Fate Fanatic!Xx♥ 3 in Mathematics

I finally came across some facts in finding UFO information from this website:
http://foia.fbi.gov/foiaindex/ufo.htm

How much does it cost to get a request when you send the form?
http://foia.fbi.gov/foia_request.htm

It doesn't even mention what fee?

2007-08-16 10:07:13 · 7 answers · asked by Agent319.007 6 in Astronomy & Space

read title

2007-08-16 10:07:05 · 4 answers · asked by Maksymilian A 1 in Physics

They were'nt as good as what they said they would be but i did see some, did anyone else out there?

2007-08-16 10:06:33 · 14 answers · asked by LouLou 4 in Astronomy & Space

do you guyz belive in travel? like is it posible??

2007-08-16 10:04:44 · 11 answers · asked by smplytffny 2 in Astronomy & Space

The degree measures of two consecutive angles of a rhombus are represented by 5x + 10 and 3x + 50. Find x

the point is i don't understand the word consecutive means. Does it mean the same or not the same.

2007-08-16 10:01:40 · 5 answers · asked by Anonymous in Mathematics

This has been answered poorly many times before with answers about bright backgrounds, etc. But there are never any answers as to why pictures with very low light background, such as pictures of asteriods (NEAR) and others have no stars in the background. If you see pictures with stars in the background, the stars have been added.

One example of this deceit is at the site below where NASA has clearly superimposed the constellation Orion on top of the Aurora! You can clearly see that the stars are in front of the Aurora, not seen through the Aurora!! NASA continues to decieve the public over this star issue.

http://antwrp.gsfc.nasa.gov/apod/ap970126.html

2007-08-16 10:01:36 · 22 answers · asked by enternewid 2 in Astronomy & Space

My class is using the 4th, but I want to know if I can use the 5th b/c I already ordered it.

2007-08-16 10:00:28 · 4 answers · asked by J Z 4 in Physics

What is the length of spacial diagonal of the brick?

2007-08-16 10:00:12 · 5 answers · asked by Alexander 6 in Mathematics

how would you measure the speed of gravity and how do you think there gonna harness it?

2007-08-16 09:58:11 · 9 answers · asked by Anonymous in Physics