Science & Mathematics - 27 September 2006

He wants to protect himself when having dinner or watching tv, Is there a company that manufactures bullet proof glass stands that you can move around the house that will shield incoming bullets? He doesnt want to replace the windows in his house.

2006-09-27 19:17:06 · 6 answers · asked by Anonymous in Engineering

the following question is with reference to the topic"permutations & combinations" from the subject -mathematics

2006-09-27 19:10:50 · 5 answers · asked by Anonymous in Mathematics

Solve by the addition method: 3x - 4y = 11 and -3x + 2y = -7 Check your solution.

3x=-4y+11
3x/3=(-4y+11)/3
x=(-4y+11)/3 Teacher: Sorry, I have no idea what you are doing here. There are two equations and this is a system. Therefore, they must be solved together.

Check: 3x - 4y = 11
3((-4y+11)/3)+4y=11
-4y+11+4y=11
-4y+4y+11=11
11=11

-3x + 2y = -7
(-3x)/(-3)=(-2y-7)/(-3)
3x/3=(2y+7)/3
x=(2y+7)/3

Check:-3x + 2y = -7
-3*((2y+7)/3)+2y=-7
-3*(2y+7)/3+2y=-7
-(2y+7)+2y=-7
-2y-7+2y=-7
-2y+2y=0
0=0
Teacher: Sorry wrong

2006-09-27 19:10:16 · 10 answers · asked by SCHNITZEL 1 in Mathematics

1st equation: Vf = Vi + at
2nd equation: Vit + 1/2at2
3rd equation: 2aS = Vf2 - Vi2

2006-09-27 19:05:36 · 2 answers · asked by Anonymous in Physics

2006-09-27 19:02:18 · 32 answers · asked by chefcrackers 1 in Mathematics

the increased pressure?

2006-09-27 19:00:46 · 3 answers · asked by JoeSchmo5819 4 in Physics

2006-09-27 18:54:49 · 11 answers · asked by kalyan s 1 in Astronomy & Space

2006-09-27 18:52:05 · 2 answers · asked by Anonymous in Biology

2006-09-27 18:48:48 · 4 answers · asked by Patrick Bateman 3 in Zoology

2006-09-27 18:47:26 · 7 answers · asked by Patrick Bateman 3 in Engineering

lol.

2006-09-27 18:40:28 · 4 answers · asked by rustik 4 in Other - Science

Question is - Enter: 42 Change to: 92 How? ____ What is the answer? Any suggestions would be appreciated!

2006-09-27 18:40:05 · 6 answers · asked by DrBee 1 in Mathematics

2006-09-27 18:39:32 · 9 answers · asked by ? 2 in Zoology

Here's my question:

x^5y^3z^2 / x^2y^3z^7

In my textbook, it shows how to reduce this expression like this:

x^5-^2 y^3-^3 z^2-^2 / x^2-^2 y^3-^3 z^7-^2

Why is this?? And then it shows that this expression reduces to:

x^3y^0z^0 / x^0y^0z^5 = x^3/z^5

How does it end up being x^3/z^5?
Do the numbers with the exponent of 0 (x^0) end up being omitted or something?

2006-09-27 18:33:13 · 6 answers · asked by J.Welkin 1 in Mathematics

2006-09-27 18:33:09 · 6 answers · asked by Jessica :) 1 in Earth Sciences & Geology

2006-09-27 18:31:50 · 12 answers · asked by liljov2 2 in Mathematics

2006-09-27 18:30:36 · 12 answers · asked by Anonymous in Earth Sciences & Geology

2006-09-27 18:26:43 · 18 answers · asked by craigyboy 1 in Weather

2006-09-27 18:21:32 · 8 answers · asked by Anonymous in Weather

2006-09-27 18:17:04 · 10 answers · asked by Anonymous in Astronomy & Space

2006-09-27 18:16:46 · 20 answers · asked by baalcoba 1 in Earth Sciences & Geology

okay, so one day i am driving to school with other people. then we notice that the sun is well red. and so, i wonder what makes it red. and could you give a website for an explanation for me to go to? i was thinking of doing a report on it for science.

2006-09-27 18:14:48 · 16 answers · asked by science project due on 17th 1 in Earth Sciences & Geology

Prove that a^n+b^n=c^n is infinity if a, b,c is integer and n>2

2006-09-27 18:13:18 · 7 answers · asked by Manh B 1 in Mathematics

2006-09-27 18:13:07 · 3 answers · asked by Anonymous in Mathematics

control: plasmid + buffer + water
tube 1: plasmid + buffer + restriction enzyme A + water
tube 2: plasmid + buffer + restriction enzyme B + water
tube 3: plasmid + buffer + restriction enzyme A + B
purpose: determine length of fragments made by restriction enzymes.
question: why does control (plasmid + buffer + water) have to be the same volume?
thanks guys.

2006-09-27 18:12:08 · 2 answers · asked by Anonymous in Biology

A person walks the path shown below. The total trip consists of four straight-line paths.
Path 1 is 90.0 m due east.
Path 2 is 160.0 m due south.
Path 3 is 120.0 m 30.0° south of west.
Path 4 is 200.0 m 60.0° north of west.
At the end of the walk, what is the person's resultant displacement?
___ m at ___° south of west.

2006-09-27 18:11:58 · 4 answers · asked by tingerpoo 2 in Mathematics

2006-09-27 18:08:01 · 5 answers · asked by gnb1127 1 in Engineering

I've never been a nerd or into science,but i though of this question to ask. I notice that people land on other planets and when u see it they're just walking around on it and it looks the same as a map would show it. Wich makes me wonder,are we inside of the earth,or on top of it,i think we are inside. I'm only 14,just curious. SO please help me out with this.

2006-09-27 18:07:40 · 9 answers · asked by Ramon O 3 in Astronomy & Space

I genuinely need help with this: "A student sets up the following experiment. She purchases 5 punnets of marigold seedlings and 3 pieces of different 'thickness' shade cloth. She pots up each marigold into individual pots and gives each a pinch of fertiliser. She divides the pots into 5 equal sized groups. She constructs a box out of each piece of shade cloth, places one group of pots in each and places them, side by side, in full sun position in the garden. She places another group, without any shade cloth, next to them and another group inside a garden shed where they will receive no direct light'.

a) Give a suitable hypotheses for the experiment.
b) Give two other environmental variables which might effect the outcome.
c) Suggest two ways to improve the accuracy of her experiment.

i'm really stuck on this so i'm hoping somebody can help me. :-) thankyou

2006-09-27 18:03:52 · 3 answers · asked by Anonymous in Biology

2006-09-27 18:03:41 · 8 answers · asked by bossa1029 1 in Astronomy & Space