Science & Mathematics - 7 February 2007

2007-02-07 21:57:47 · 2 answers · asked by saqibzaheer77 1 in Mathematics

2007-02-07 21:57:17 · 1 answers · asked by Anonymous in Mathematics

2007-02-07 21:55:54 · 14 answers · asked by Anonymous in Astronomy & Space

I live in the northwest of England.

2007-02-07 21:53:44 · 2 answers · asked by monkey 1 in Astronomy & Space

I'm in Harrogate, Yorkshire - its just started to snow and it looks like its settling. Better enjoy it because with global warming it's probably the last time it's going to happen for a while!

Is it snowing where you are and where are you?

2007-02-07 21:53:01 · 23 answers · asked by Madam Rosmerta 5 in Weather

Identify the graph of each of the following as a circle, an ellipse, a hyperbola, or a parabola.

(1) 4x^2 +y^2 =4 --> Ellipse
(2) y= x^2 -4 --> hyperbola but the y isn't squared so?
(3) y^2= x^2-4 --> hyperbola
(4) y^2= 4-x^2 --> er----

2007-02-07 21:52:45 · 3 answers · asked by Kala J 3 in Mathematics

What is the volume in Liters of a 7.85x10(to the 4th power) g sample of copper if the density of copper is 8.90g/mL?

One penny weighs 2.50 grams and has a density of 6.94g/mL. If you drop 50 oennies into a beaker with 250.0 mL of water in it, what will be the total volume in the beaker? What will be the total mass in the beaker?


I have no idea how to do these two problems. Any help would be wonderful!

2007-02-07 21:51:09 · 2 answers · asked by ... 2 in Chemistry

Two cylindrical vessels of equal crosssectional area 'A' contain water upto heights 'H1' and 'H2'. The vessels are interconnected so that the levels in them become equal. Calculate th work done by the force of gravity during the process. The density of water is P

2007-02-07 21:50:20 · 4 answers · asked by Anonymous in Physics

2007-02-07 21:46:15 · 2 answers · asked by Sunny 2 in Engineering

If photovoltaic cell only uses less than half of the light that hits them and reflects the rest away, and fiber optics are long, thin strands of very pure glass wrapped in something that keeps the light from getting out, why can't you line the inside a container with photovoltaic cells, mirrors and a low watt light source and get enough electrity to power itself (after a jump start, ofcourse)?

2007-02-07 21:44:08 · 5 answers · asked by wtboy_2000 1 in Engineering

2007-02-07 21:41:21 · 22 answers · asked by a_rahmanshah 1 in Astronomy & Space

i am in leicester and i have had so much snow i con't get my car off the drive so no work for me apart from house work that is. how is everyone else

2007-02-07 21:39:50 · 14 answers · asked by pithermichael 2 in Weather

2007-02-07 21:39:22 · 4 answers · asked by Vlad Cioflec 3 in Zoology

i didnt what is the first theory all about logarithm so i want to ask it from you my dear friend out there...

2007-02-07 21:38:20 · 3 answers · asked by Anonymous in Mathematics

2007-02-07 21:37:25 · 6 answers · asked by ladysorrow 7 in Weather

Question: Given that the points (-2,8), (1,1) and (3,k) lie on a straight line, calculate the value of k.


Note: Please help me. I know that the 1st number of each are the x-values so k is a y-value. How do I solve this but also how do I clearly show the working?

Could you please take me through the steps of finding out what k is (the value). Thankyou so much for your help.

Question 2: I need to express the equation x/3 + y/6 = 1 in the form y=mx+c

What is the answer? What I did, was I multiplied the x/3 by two so that the denominator of the fraction was 6 like y/6. I then multiplied the 2x/6, y/6 and 1 by 6 so that the two (y and 2x) on the left hand side of the equals sign were whole numbers. I subtracted 2 x from the left hand side so it was -2x on the right hand side. This worked out to: y=-2x+6 Is this correct?

Thankyou!

2007-02-07 21:36:15 · 5 answers · asked by Need advice quick... 1 in Mathematics

I'm not sure if this has any meaning, or if it does, that anyone will know what it is. Thought this might be the right place to ask though. This happens numerous times every day and has been going on for a couple of months, so it can't be just coincidence. Any ideas?

2007-02-07 21:34:14 · 19 answers · asked by DC 1 in Mathematics

preferbly in layman terms that is easily understood, and please state suitable websites for references. Thanks

2007-02-07 21:33:21 · 2 answers · asked by Anonymous in Physics

preferbly in layman terms that is easily understood, and please state suitable websites for references. Thanks

2007-02-07 21:32:26 · 1 answers · asked by Anonymous in Physics

Zyban added to Zoloft and Torridal is this normal?
I had a migraine on monday the doctor offered Percoset I said no thank you lets try the Toridol ( high dosage of ibuprofen) I also got a perscription for the zoloft ( to treat bi polar) the next day I also got ( from the SAME doctor) zyban to quit smoking ( which will help with the migraines. I took the torridal the night before took the zoloft in the morning and the zyban in the afternoon.....I was so fulll of nervous energy I couldn't sit still. Is this a normal reaction should I be concerned or just wait it out.

2007-02-07 21:29:53 · 2 answers · asked by Natashya K 3 in Medicine

A) 100

B) 2,000

C) 1,000,000

D) 100,000,000

E) 350,000,000

2007-02-07 21:29:45 · 3 answers · asked by max 1 in Physics

2007-02-07 21:29:27 · 3 answers · asked by Sanjay Kumar 3 in Physics

I need to find out, for my course work, ' the industrial preparation of ammonium sulphate'. I have look on loads of sites but can't find the right thing, please help. I think I need to write about 2 paragraphs.
Thanks

2007-02-07 21:26:32 · 3 answers · asked by ATB 2 in Chemistry

2007-02-07 21:20:13 · 8 answers · asked by triste 2 in Astronomy & Space

This is a question I am having probelms with. The answers to choose from are:

a. 5f
b. 3p
c. 2s
d. 4d

I thought that both the "p" and the "d" form a spherical charge cloud, but you can only choose one answer.

Could someone please explain to me which one is right and why.

I am thinking the 4d answer but it just doesnt make any sense.

Thank You!

2007-02-07 21:18:53 · 5 answers · asked by Silence06 2 in Chemistry

I have to do a project on black holes. I have written what a black hole is, how it is formed and what it looks like. What else should I include? Please help!!!

2007-02-07 21:16:15 · 6 answers · asked by Anonymous in Astronomy & Space

2007-02-07 21:12:19 · 9 answers · asked by Anonymous in Medicine

2007-02-07 21:10:02 · 11 answers · asked by Siben 2 in Mathematics

its snowing here in Cambridge - about 3 inches deep - and set to snow all day - yippppeeeeeeeeeeee!!i'm going to make massive snowman outside my front door and hope for a blizzard...lol

2007-02-07 21:08:23 · 11 answers · asked by Anonymous in Weather

2007-02-07 21:08:06 · 7 answers · asked by Siben 2 in Astronomy & Space