Science & Mathematics - 9 November 2006

Find the error in the following proof:
Given: a = b = 1
Prove: 1 = 0 (obviously false!)

Given:
a = b
Multiply:
a*a = a*b
(a^2 = ab)
Subtract:
a^2 - b^2 = ab - b^2
Factor:
(a+b)(a-b) = b(a-b)
Divide:
(a+b) = b
Subtract:
a = 0
Substitute:
1 = 0
Q.E.D.

2006-11-09 11:31:11 · 5 answers · asked by topher8128 2 in Mathematics

2006-11-09 11:29:36 · 3 answers · asked by Lori T 1 in Zoology

size?

2006-11-09 11:28:57 · 5 answers · asked by mapleafgal sweet an delicious 1 in Astronomy & Space

2006-11-09 11:28:30 · 12 answers · asked by Anonymous in Astronomy & Space

For example its history, who used it, who invented it, how it was invented, ect. I know what it is, but I would like to know its backround.

2006-11-09 11:28:22 · 3 answers · asked by gg_sk8ertm 2 in Mathematics

I don't know how to

2006-11-09 11:27:39 · 6 answers · asked by kaylee r 2 in Mathematics

2006-11-09 11:20:10 · 9 answers · asked by carnival queen 5 in Astronomy & Space

2006-11-09 11:19:07 · 4 answers · asked by dale g 1 in Zoology

Here is this chemical formula (it also has to be balanced) I have for homework, plzzzz solve it or help me!

it is: (the numbers are subscripts.)

Na2CO3 + AgNO3 =

ps. this is a "double displacment formula"

2006-11-09 11:18:22 · 9 answers · asked by Focusin 2 in Chemistry

2006-11-09 11:17:58 · 10 answers · asked by kalifahb 2 in Biology

A gas has density of 36056 g/L at STP. What is its density at 647 torr and 72 degrees C? (answer in units of g/L).
i dont know how to approach this...! :(

2006-11-09 11:17:14 · 3 answers · asked by Anonymous in Chemistry

my google earth doesn't work( idk y)
any links?

2006-11-09 11:16:59 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2006-11-09 11:16:45 · 15 answers · asked by shorty 1 in Physics

You know like the periodical table of eliments

2006-11-09 11:13:26 · 8 answers · asked by Alexis R 1 in Chemistry

I know that it is a point of extreme emission of light, but what exactly causes it, and what is being let off?

2006-11-09 11:09:20 · 9 answers · asked by gloves1931 2 in Astronomy & Space

2006-11-09 11:08:49 · 11 answers · asked by birdman 2 in Astronomy & Space

2006-11-09 11:08:43 · 2 answers · asked by sofia m 1 in Chemistry

did anyone take geopraphy in high school? omg i cant stand it. all of eastern europe and northern eurasia its soooo confusing!!!

2006-11-09 11:08:39 · 20 answers · asked by campinconn 2 in Geography

I also need help with other physics questions so if anyone is good at physics please have pity and send help! Also please send equations used with answers, so that I can learn to do it myself.

2006-11-09 11:07:04 · 6 answers · asked by mariandmommy 2 in Physics

5
3
7

2006-11-09 11:05:13 · 5 answers · asked by Yisi 3 in Earth Sciences & Geology

A 72.0 kg box slides down a 29 degree ramp with an acceleration of 3.5 m/s/s. The acceleration of gravity is 9.81 m/s/s. Find the coefficient of kinetic friction between the box and the ramp. How would I solve this? I'm tilting the problem so that the only part that needs to be broken into components is the Fg.

2006-11-09 11:04:05 · 5 answers · asked by Audrey M 1 in Physics

compound?

2006-11-09 11:03:28 · 5 answers · asked by geniusflightnurse 4 in Chemistry

2006-11-09 11:02:44 · 6 answers · asked by sylviacutie06 1 in Chemistry

An apparatus consists of a 4L flask containing Nitrogen gas at 19degrees C and 780 kPa, joined by a valve to a 7 L flask containing argon gas at 19degrees C and 40.8 kPa. the valve is opened and the gases mix. What is the partial pressure of the nitrogen after mixing? Use units of kPa.

i found the moles of each gas, and used the proportion moles of gas over total moles, multiplied by total pressure.
im thinking this is wrong.
how do i do this?

2006-11-09 11:01:56 · 1 answers · asked by Anonymous in Chemistry

A large superball and a small superball are dropped from the same initial height H. Both balls bounce backup to a height h, which is just a bit less than H. If, however, the small superball is placed immediately above the large superball and both are dropped to the ground simultaneously from height H, the small superball rebounds to a height h' > H! Explain this in terms of Conservation Laws.

Is it because the larger ball is providing the smaller one with extra "bounce"? I'm not exactly sure...thanks =)

2006-11-09 11:01:46 · 3 answers · asked by Silver 2 in Physics

1.heart
2.Lungs
3Liver
4Kidneys
5.Stomach and intestines
6.Mucles
7.brain
8.Bladder
and any other internal organs you can think of.

2006-11-09 11:00:36 · 9 answers · asked by &Ashley;; 2 in Biology

Why cant i see 3D buildings like it said u could?

2006-11-09 10:59:28 · 3 answers · asked by Leo 3 in Astronomy & Space

NEED 2 KNOW NOW

2006-11-09 10:58:33 · 1 answers · asked by SighSai 1 in Earth Sciences & Geology

2006-11-09 10:56:50 · 2 answers · asked by baby_tiffy 2 in Chemistry

2006-11-09 10:56:16 · 18 answers · asked by 13 year old boy 1 in Astronomy & Space