Science & Mathematics - 8 January 2007

There is a line with a formula 7x+4y-140=0
and a circle with a formula x²+y²-8x-4y-5=0 in xy plane.
Please don't just give the number. Also give the solution.

2007-01-08 00:49:29 · 5 answers · asked by Salih D 1 in Mathematics

Every morning I fill up a glass with water and put it on my desk. I drink about a 1/4 of it. Then, sometimes it sits there the rest of the morning, like if I'm not working at my desk or I choose to drink coffee instead. After lunch, when I get fresh water, I've noticed that there are little bubbles in the water. Right now, the water has been sitting for an hour and there's no bubbles. But, I know there will be later. What's going on?

2007-01-08 00:48:45 · 5 answers · asked by ☆skyblue 7 in Other - Science

2007-01-08 00:44:03 · 5 answers · asked by tweety365 1 in Engineering

can anyone tell me the name of the chemical listed below?

Fe - ?
CaO - ?
MgO - ?
H2SO4 - ?
HNO3 - ?
HCL - ?
NaOH - ?
KOH - ?
AgNO3 - ?
KIO - ?
NH4Cl - ?
BaCl2 - ?
HFO - ?

And 1 more question is that

what is lonic bond and coralent bond.

2007-01-08 00:42:24 · 6 answers · asked by Hua Cu P 1 in Chemistry

Are AgHS and Al2(CO3)3 respectively named Silver hydrosulfide and dialuminum tricarbonate?

Explain why chlorine has a lower electron affinity value than sulfur, why phosphorous has a higher value than silicon, and why beryllium has a higher value than lithium.

Arrange the following atoms or ions in order of increasing size:
1.Br -, Ca 2+, K +, Se 2-
2.Al 3+, F -, Na +, Mg 2+, O 2-
3.As 3-, Ca 2+, Cl -, K +

2007-01-08 00:40:55 · 2 answers · asked by Maziar S 3 in Chemistry

2007-01-08 00:40:47 · 1 answers · asked by Anonymous in Physics

2007-01-08 00:37:34 · 6 answers · asked by Mickey 1 in Biology

2007-01-08 00:36:29 · 21 answers · asked by Cozmik 2 in Paranormal Phenomena

No personal offend please, just imagine....

2007-01-08 00:36:20 · 5 answers · asked by Pooop 2 in Biology

Why does universe has no start and end point, when everything inside the universe has one start and one end point?

2007-01-08 00:33:59 · 12 answers · asked by Master 1 in Astronomy & Space

2007-01-08 00:33:38 · 2 answers · asked by pankaj 2 in Chemistry

2007-01-08 00:32:16 · 1 answers · asked by jett c 1 in Chemistry

2007-01-08 00:30:47 · 2 answers · asked by Anonymous in Physics

2007-01-08 00:28:09 · 13 answers · asked by puppy kutty 1 in Geography

2007-01-08 00:26:25 · 5 answers · asked by vimal k 1 in Geography

2.73 x 10 to the power of 4

2007-01-08 00:26:19 · 8 answers · asked by Anonymous in Mathematics

2.73 x 10 to the power of 4

2007-01-08 00:25:52 · 5 answers · asked by Anonymous in Mathematics

pls answer...=)

2007-01-08 00:22:29 · 3 answers · asked by loRi^^, 2 in Botany

can a lion or its cub turned vegetatrian throughout its life

2007-01-08 00:18:21 · 26 answers · asked by hsatia 1 in Zoology

how does bar coding electronic machine works? what is the basic principle behind it? what type of circuitary they are using?

2007-01-08 00:15:10 · 4 answers · asked by dhillon s 1 in Engineering

2007-01-08 00:14:27 · 4 answers · asked by inash 1 in Biology

2007-01-08 00:13:18 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Is a swan and penguins ect. typs of ducks because they have webbed feet? If they arn't can you tell me the defenition of what it means to be a duck.

2007-01-08 00:07:03 · 13 answers · asked by airaM 1 in Zoology

We know our life can be hard sometimes, but no one can denie how easy is our life because of electricity...
how do you think we would live without it? What problems would be raised? Have you ever thought about it?
Be sincere and explicit with examples please :)

Thank you in advance
***

2007-01-08 00:06:25 · 21 answers · asked by Ana P 2 in Other - Science

Also the answers to (wanna double check):
1]72.5
2]202.8
3]6879
4]325000
5]0.00006

Thank you

2007-01-08 00:05:17 · 3 answers · asked by Anonymous in Mathematics

boilogy

2007-01-08 00:05:01 · 16 answers · asked by nandu 1 in Biology

2007-01-08 00:01:02 · 11 answers · asked by Anonymous in Astronomy & Space

2007-01-08 00:00:58 · 14 answers · asked by boubou 3 in Medicine