urza

OMG

thx alot mezarashi, you're a lifesaver

this is more than i expected to get

thx alot for your time

I'll be taking it next year

well obviously i wouldn't be here if i wasnt stuck

and no this isnt a homework assignment

and yes i've already drawn the triange in order to visualize it

and you can't do it using simple triangle rules...

plus have any of you tried doing it before you answered here

thx anyway..

hey there

can anyone help me with this math problem concerning vectors:

Given a triangle ABC. Let D and E be the points defined by BD= 2/3 BC and AE=1/2 AC. The lines (BE) and (AD) intersect at M, and the line thorugh E parallel to (BC) intersects (AD) in F.

a) Prove that MD + 4MF = 0 and MB + 4ME = 0. Deduce that 2MA + 3MD=0

b) Show that 5MC = 2CA + CB

c) Define L by CL + 2 CA = 0 and I by LI = BC. Prove that C, M, and I are

collinear.

thx

Can anyone please give me detailed information on how biological clocks in plant work, and examples of disfunction?

thx

oil leakages in general as in pipelines, refineries, and not in transportation vehicles and such, more of the ones that deal with freak accidents that destroy nature

it says that they are used as tracers and how it is done, but the explanation is too superficial. Do you know the exact method of how they detect leakeges? as in a step by step thing

Ya dragons are really something that would be cool if they truly did once exist, But unfortunately it's highly immposible. I doubt there's a possibilty at all.

What was the documental called?where did you see it?

hey i'm doing a stastics math project.

just wanted to knowif anyone has cool idea on what subject i should do it on....

ie. The number of sales an icecream man makes a week...

smthn like that

thx

sorry to bother you all again, but i'm having a problem with radioactivity again.

I've read that these radioactive isotopes can detect oil leakages.

I've ran searches but haven't found any results on exactly how this process occurs.

can anyone give me any info?

thx

well if there's any biological problems in your community then you should research ways to resolve That exact problem, i have experience in science fairs and i know judges just love it when you do something for the community.. dont get too broad on your subject, like dont do something that would benefit another area, city whatever... do one for your own.. if there's any pollution problem in yor area you can experiment on different ways to reslove that problem...

errr just out of curiosity were you born on june?

the UN tries to act communist but totally fails' date=' personally i don't think the UN should exist anyways. it would be much more convienent to if one country just took over the world.

 

but as for the topic at hand, i don't personally agree with countries contributing MONEY to other countries. It would be much more effective if instead foot, shelter, and clothing were sent instead of money that can easily fall into the wrong hands.[/quote']

 

 

i agree with your second statement but not your first... explain how you think they are trying to be communist, do you even know the meaning of the word and everything associated with it?

but you have to break some of the bricks...

A gamma ray simply cannot enter a nucleus and cause it to break apart. The copious amounts of electrons on the outside of the nuclei absorb the gamma rays' energy before it can even affect the nucleus. Any alpha and beta radiation is contained within the container of the radiation source.

then how are the bacteria killed if you say that a gamma ray cannot peneterate the nucleus and make it break apart?

so I understand this is a nono for the agriculture industry.

or is it that they only apply it to products that are ready to be shipped and not used for "breeding" purposes?

and what of the fruit, does its DNA also de-nature, leaving it sterile, or is it somehow unaffected? is so , then how?

so how do the bacteria die and the fruit or whatever it is you're giving a longer "shelf-life"

remain unaffected by the radioisotope, or even the alpha,beta,or gamma rays it releases?

They do it with lots of foods.

how do they do that without making the food itself radioactive?

hmm ya rate of decay, i already wrote a whole c++ program on that.. a calculator with all radioactive isotopes and their half lives, which can calculate the total amount left over a certain period of time.. or vice versa with the time spent after a certain portion have decomposed... anyway i might experiment with what YT2095 mentioned. That is, the indefinate shelf life after implementing radioisotopes to food....

mmm.. yeah heat does speed up a process, and it would be useful and enviromentally friendly if it were contained.. but is it better than all other options?

i might actually experiment on this...

ok thx for answering. it means alot....

wow is this the only feedback you can give me!!

if you have no idea what i'm talking about plz do tell....

its used in bombs... many nations used it to devolp mines and other explosives during WWII

what i thought was that if i added these isotopes to dumpsites which are isolated from most inhabited "living" areas that it wouldn't have much affect on the enviroment.. of course some of the enviroment might be endagered like the animals that inhabit dumpsites, but the pros would far outweigh the cons.

should i go with it or not??

yes i know.. thats why i said increase the rate of.... they will serve as a catalyst.... and it'll take them a while to "eventually" decompose

anybody else.. any comments at all??