Science & Mathematics - 23 August 2007

1. There are four points on a line in the order of A, D, C and B. AD=(5/9)*DB, AC= (9/5)*CB and CD=4, what's the length of the whole line being AB.

2. A line segment AB is divided into 3 parts, the ratio of the length of the three parts is 3:4:5. The distance between the midpoint of the first part and the midpoint of the first part and the midpoint of the second part is 1.75 cm. What is the length in centimeters of AB.

3. There are 6 points on a plane, and exactly 3 points are in the same line. How many lines can be drawn through these points?

2007-08-23 09:47:25 · 2 answers · asked by Anthony W 2 in Mathematics

2007-08-23 09:46:32 · 2 answers · asked by Tahpenes S 1 in Physics

How many seconds there are in a (non-leap) year?

2007-08-23 09:45:29 · 7 answers · asked by Lidia C 1 in Mathematics

It needs to fit inside an 8cm x 10cm x 6cm rectangular prism
I also need to be able to insert and withdraw the ice cube quickly and easily.

2007-08-23 09:45:29 · 7 answers · asked by A Yahoo! Answers User 2 in Engineering

1. bx-cx= -c
2. x/a - 5=b

2007-08-23 09:45:14 · 3 answers · asked by [xo♥ox] 1 in Mathematics

I need to classify each of these hazards as physical, morale, or moral.

A careless driver
A person who suffers an exaggerated case of whiplash following an automobile accident
A worker who occasionally leaves a dangerous machine unattended to talk with friends
An employee who occasionally embezzles money
Icy road conditions

2007-08-23 09:41:08 · 1 answers · asked by rainee 1 in Engineering

write each number in scientific notation

1) -0.0128



write each number without exponents


8.9 x 10^6

2007-08-23 09:40:20 · 2 answers · asked by ineedmathhelppeas 1 in Mathematics

2007-08-23 09:39:46 · 3 answers · asked by Kevin C 2 in Other - Science

What is true about CFC's: a) very reactive chemicals. b) Generally unreactive, but deecompose when exposed to solar radiation. c) CFC's are contaminating ground water. d) directly react with ozone. e) More CFC's are in use now than ever before

2007-08-23 09:35:07 · 2 answers · asked by BlanketyBlank 4 in Chemistry

is a tub of butter more or less than a quart?
is a tub of butter more or less than a pint?
the kind of butter i have is shop and save, but i think any butter that is 16oz would work.

2007-08-23 09:33:33 · 1 answers · asked by Alex 3 in Other - Science

ok well my sci teacher said that she made a liquid that is almost like liquid nitrogen it is not as cold she said to put dry ice in alcohol. I want to kow if that works and is there any other way to make it

2007-08-23 09:31:22 · 4 answers · asked by phil p 1 in Chemistry

what exactly is an engineer and which one does blue prints for a states landscaping

2007-08-23 09:30:18 · 2 answers · asked by educatedladyof08 1 in Engineering

A circle is given with an inscribed equilateral triangle and each side of the triangle having a measurement of 24 cm. What is the probability of selecting a point at random inside the circular region, but not inside the triangle, assuming that the point cannot lie outside the circular region. Leave your answer in exact form.

2007-08-23 09:30:12 · 5 answers · asked by Anonymous in Mathematics

2007-08-23 09:27:02 · 4 answers · asked by Anonymous in Chemistry

when do you multiply and/or add exponents?

2007-08-23 09:21:25 · 5 answers · asked by ineedmathhelppeas 1 in Mathematics

Why does it matter which one the weather man says, he`s always wrong anyway,,,

2007-08-23 09:21:01 · 11 answers · asked by Mr. Goodnight. 3 in Weather

2007-08-23 09:19:43 · 3 answers · asked by LONITA F 1 in Weather

2007-08-23 09:19:31 · 2 answers · asked by k_bonine 2 in Engineering

and this would occur why?

2007-08-23 09:15:15 · 5 answers · asked by Anonymous in Astronomy & Space

Name the following compounds or write their formulas.

1) ______ carbon tetrachloride
2)______ iron (III) nitrate
3) ______ aluminum hydroxide
4)______ CuSO4
5) ______ C3H4
6)______ ammonium sulfite
7)______ C2H5OH
8)______ WBr5
9)______ stannous fluoride
10)_______ nitrogen (II) oxide
11)________ PI3
12)________ heptyne

Please help I need to study off of this!!!

2007-08-23 09:14:09 · 6 answers · asked by Anonymous in Chemistry

2007-08-23 09:13:00 · 15 answers · asked by mirrorbee 6 in Mathematics

What is the gretaest integer that can not be reached by adding different perfect square integers? I started thinking about this problem a few days ago but could made no progress. What is the general idea here? Does it require a graduate level of mathematics?

2007-08-23 09:05:21 · 3 answers · asked by bilgilikisi 1 in Mathematics

2007-08-23 09:01:50 · 1 answers · asked by Anonymous in Mathematics

2007-08-23 08:59:18 · 10 answers · asked by Fabrice 1 in Zoology

m^2 + 12m + 30 = 0

2007-08-23 08:57:22 · 4 answers · asked by xrandomnessx 2 in Mathematics

2007-08-23 08:55:44 · 2 answers · asked by MedTq367 6 in Chemistry

Ok so Aspartame is C14H18N2O5

How many atoms of nitrogen are in 1.2g of aspartame?

If anybody could explain how to do this I would greatly appreciate it.

Thanks.

2007-08-23 08:43:06 · 4 answers · asked by Andrea 2 in Chemistry

Water has a mass per mole of 18.0g/mol, and each water molecule (H2O) has 10 electrons. a) How many electrons are their in one liter (1.00 x 10 to the negative third mto the third) of water? b) What is the net charge of all these electrons?

2007-08-23 08:42:29 · 3 answers · asked by Diane S 1 in Physics

So one afternoon I went to cook for a friend of mine, and when I opened my cupboard, the entire top shelf collapsed and about 10 heavy glass oven pans fell on me. Thank God they didn't hit my head, only my feet and sliced me pretty good. That same day, as I was getting ready, I knocked over the glass i was drinking in. That same evening (I swear I couldn't make this up) I knocked down and broke a shot glass at a party.
The next few days it kept happening. I'd go in the fridge, grab a bowl and it would slip from my hand and fall, break. I was drinking coffee the cup fell off the counter (without my help) I woke up one morning got out of bed and glass was place right by my feet and i knocked it over. Last night i was on the phone and knocked down my glass.
Sorry for rambling but this is so weird. I'm not usually a clumbsy person, it keeps happening with glass. Does anyone know what this might mean? I'm not a believer of bullshit either but if there is any meaning you know of.

2007-08-23 08:41:09 · 16 answers · asked by tati 1 in Paranormal Phenomena

2007-08-23 08:38:46 · 5 answers · asked by chelsea b 1 in Engineering