Science & Mathematics - 6 September 2007

2007-09-06 08:40:31 · 9 answers · asked by jessie 1 in Mathematics

Imagine you have toothpicks layed out like this:

__ __ __
|__ |__|__|__
............|__|__|

Now only moving two toothpicks, how can you create 4 equal boxes. You can only move two toothpicks, and they cant lay on top of each other, ect. (NOTE: The periods are just so that everything lines up. There have nothing to do with the problem)

After about half an hour working on this, I came up with something, but i think it would count as laying them on top of them. Anyone else come up with something I'm not seeing?

NOTE: This is just a for fun thing, my teacher gave us to work on over the weekend, not for homework or test. Thanks everyone.

2007-09-06 08:39:52 · 2 answers · asked by Anonymous in Mathematics

pain. On hand is 200mg/5ml. how many ml's will you administer?

I know the answer is 2.25 mL... HOw do you come up with that answer?

2007-09-06 08:38:21 · 1 answers · asked by ♥ B1tchHere ♥ 4 in Medicine

2007-09-06 08:32:25 · 1 answers · asked by Anonymous in Chemistry

A spherical balloon is being inflated and the radius of the balloon is increasing at a rate of 3 cm/s.

a)Express the radius r of the balloon as a function of the time t (in seconds). r(t)=?

b) If V is the volume of the balloon as a function of the radius, find V(r(t)).

2007-09-06 08:23:50 · 2 answers · asked by lady_divine@sbcglobal.net 1 in Mathematics

im 12 and i dont understand it it would be like

1200 divided by 2.5

how would i do that

2007-09-06 08:23:18 · 4 answers · asked by Anonymous in Mathematics

http://www.youtube.com/watch?v=UXY5hWOtgOI

2007-09-06 08:21:20 · 1 answers · asked by TD Euwaite? 6 in Physics

Two sisters who live 500 miles apart decide to meet at the halfway point for a visit. Joanne leaves at 11 and travels 50 mph. At noon, Sue leaves travels at 60 mph. Who will reach the halfway point first, and how much longer will she have to wait for her sister?

I just need the basic set up equation. We have to make up our own equation and solve it. I'm not sure though on how to set it up.

2007-09-06 08:13:34 · 7 answers · asked by Angel*Eyesz 3 in Mathematics

2007-09-06 08:03:59 · 9 answers · asked by mrk_ck 2 in Chemistry

2007-09-06 08:03:23 · 6 answers · asked by Anonymous in Mathematics

Has anyone seen the sun today between 7 am and 8 am
the sun was red ...what the hell was that? I didnt heared anything about eclips...was there one.

2007-09-06 08:00:52 · 11 answers · asked by Anonymous in Astronomy & Space

2007-09-06 08:00:09 · 4 answers · asked by Meggy 2 in Chemistry

2007-09-06 07:59:44 · 4 answers · asked by Mike B 2 in Mathematics

Look at it, it's not in any sensible shape. I asked one of my friends this question, and they said it is because there are spaces reserved for undiscovered elements. At this, I asked him how they know about these elements if they are undiscovered.

He didn't have an answer to this, maybe you do?

2007-09-06 07:55:18 · 3 answers · asked by Anonymous in Chemistry

I've tried looking through my old study noted but I can't figure it out.I've gotten to this step: 3sinx-2cosx=0

2007-09-06 07:54:18 · 3 answers · asked by Anonymous in Mathematics

What is the estimate √60 rounded to the nearest tenth?

Please explain......

2007-09-06 07:53:52 · 4 answers · asked by BH 1 in Mathematics

2007-09-06 07:53:00 · 18 answers · asked by Anonymous in Astronomy & Space

2007-09-06 07:50:22 · 14 answers · asked by jtesn 1 in Physics

i need to plot:
y(t) = e^(t/2) * cos(2t) , 0
so i typed:
t=0:0.001:01;
y=exp(t/2)*cos(2t);

but it gives an error for the second line.
can i know how i can correctly enter the function into matlab?

2007-09-06 07:49:32 · 4 answers · asked by sh 1 in Engineering

i have a problem. a vector has an x-component of -25 units and y -component of 40.unit, find the magnitude and direction of this vector

i did this problem like
i drew from where they started to forward the left to get -25 units, then go up 40units
|
| 40 units
|
<-------------------
-25 units
magnitude is square root ((-25)^2 +40^2) = 47.2 units by pythagorean theorem

i have a diifficult to understand the angle , because i look the answer on the back i got the right answer but i dont know that is illegal method to do it

tan x = 40/-25
x = tan^-1 (40/-25) = -57.9

angle is 180+ - 57.9 = 122.1 degree
i dont know why i added 180 degree to that answer, please helps me out. thank you

2007-09-06 07:48:14 · 7 answers · asked by jennifer 2 in Physics

Is it just me or the sun used be less harmful and not that strong? When I was growing up, I don't remember the sun being that sharp and "biting". I remember being able to look at the sun for a short period but now even sunglasses are not helping and sometimes in the morning when I go to work, I cannot even look towards east because the sun is so strong and blinding. Is it the sun or something is happening to the atmosphere, so it doesn't protect us much anymore as it used to?

2007-09-06 07:47:42 · 10 answers · asked by terliuke 5 in Astronomy & Space

2007-09-06 07:43:14 · 6 answers · asked by s@m5on C. 2 in Astronomy & Space

I am given a compound. It is C3H2F2.. with the 3 carbons being double bonded to each other. The questions wants me to indicate the type of orbitals on each atom used to form each bond. I am not sure if I am right but I know the first and third carbon use sp2 orbitals to bond to hydrogen (s orbital) and fluorine (which I am not sure what orbital it is to bond to carbon). the middle carbon uses sp orbitals. I'm really confused as to what orbitals fluorine uses to bond to carbon and if the rest of my work is correctly done? please help!!

2007-09-06 07:41:59 · 3 answers · asked by vaflip 1 in Chemistry

2007-09-06 07:41:10 · 4 answers · asked by fcctom 1 in Physics

2007-09-06 07:38:35 · 2 answers · asked by sagitty10 1 in Engineering

In a football game, the quarterback is 15 yards away from making a first down and is running at 264 yards per minute. After .03 of a minute, a linebacker who is 15 yards on the opposite side of the first down marker begins running directly towards the quarterback at 440 yards per minute. Will the linebacker be able to tackle the quarterback before he gets the first down? Show all work.

2007-09-06 07:38:09 · 3 answers · asked by Angel*Eyesz 3 in Mathematics

What kind of power laser can burst baloons etc. and what kind of level do certain things become easier to do.

Can some one help. Sorry if it's not clear, but what do different power lasers do?

2007-09-06 07:36:44 · 2 answers · asked by Sean G 3 in Engineering

An airliner with 235 passengers aboard crashes on the Kansas/Missouri state line. 5/9 of the bodies lands in Kansas & the rest in Missouri. How many of the survivors are buried in Missouri?

2007-09-06 07:35:53 · 5 answers · asked by Wile E. 7 in Mathematics

2007-09-06 07:34:41 · 6 answers · asked by nothingspecial 1 in Biology

2007-09-06 07:33:46 · 7 answers · asked by messinger1965 3 in Earth Sciences & Geology