Science & Mathematics - 7 February 2007

What is the gradient of a graph of sin i (sine of incident ray) against sin r (sine of refracted ray)?

2007-02-07 19:33:04 · 3 answers · asked by Anonymous in Physics

These are what i've plotted on a graph:

(.343, .242)
(.643, .438)
(.259, .174)

What is the gradient?

2007-02-07 19:32:49 · 2 answers · asked by Anonymous in Mathematics

2007-02-07 19:30:46 · 11 answers · asked by Anonymous in Other - Science

sin(-11pie/6)=

a)-sin pie/5 b)-sin pie/4 c)-sin pie/3 d)-sin pie/6 e)not givn


cos(-2448degrees)=

a)cos58deg b) -cos58deg c) -cos72deg d)cos72deg e)not given


PLease Show Your work....or write you reasoning

2007-02-07 19:28:36 · 3 answers · asked by A 3 in Mathematics

2007-02-07 19:27:54 · 2 answers · asked by Anonymous in Chemistry

2007-02-07 19:26:53 · 9 answers · asked by Anonymous in Zoology

2007-02-07 19:26:43 · 1 answers · asked by Anonymous in Physics

The original height of the leaning tower of Pisa was 184.5 ft. At a distance of 140 ft from the base of the tower, the angle of elevation from the ground to the top of the tower is 59 degrees. How far is the tower leaning from the original vertical position?

2007-02-07 19:25:53 · 2 answers · asked by Josh 1 in Mathematics

2007-02-07 19:25:29 · 4 answers · asked by pooh 3 in Geography

I need help with this word problem, that I cannot figure out how to solve. Here it is:
Each side of a tent forms a right angle with the ground. The tops of 2 ropes are attached to each side of the tent 8 ft above the ground. The other ends of the 2 ropes are attached to stakes on the ground. If the rope is 12 ft long, what angle does it make with the level ground? And what is the distance between the botton of the tent and each stake?

2007-02-07 19:23:10 · 4 answers · asked by Josh 1 in Mathematics

Why does soap water break down membranes that isolate DNA?
explain chemically.

Using what you know about the structure of DNA and chromatin in the nucleus, name one other molecule that must be removed from the precipitated DNA before you have the DNA molecule on its own?

2007-02-07 19:18:26 · 5 answers · asked by jytopy 4 in Biology

isnt it inevitable, that someone will eventualy be killed by some?

2007-02-07 19:17:40 · 3 answers · asked by Big hands Big feet 7 in Physics

I have a matrix that is:
3 2 2
0 1 0
1 3 2

which has eigenvalues 1 (double) and 4.

for the eigenvalue 4, with algebraic multiplicity 1,
its eigenvector is (2 0 1), which implies that the eigenvalue 4 has geometric multiplicity 2, which is higher than its algebraic multiplicity, but i've read that geometric multiplicity is always <= algebraic multiplicity.

what's wrong??

2007-02-07 19:17:21 · 1 answers · asked by R D 2 in Mathematics

2007-02-07 19:15:21 · 2 answers · asked by m h 1 in Medicine

We born in this earth by Man and women. What is the meaning of sex and how it is generated in our body?.
How soul is coming into one women body and get flesh, nerves bone and blood.
Any body can give the exact answer for this.

2007-02-07 19:14:29 · 16 answers · asked by rajaraman v 1 in Biology

about mwd/lwd direction.....everithing

2007-02-07 19:13:32 · 2 answers · asked by Anonymous in Engineering

2007-02-07 19:12:46 · 1 answers · asked by lonely as a cloud 6 in Weather

There is no snow here in Devon and I feel that the rest of the country is being a bit greedy keeping it all to yourselves - we feel terribly left out so please could you send it back down this way? After all, we passed it northwards to you last night - don't be mean. By the way, does anyone else in the UK have a local weather presenter that is COMPLETELY HOPELESS like ours?

2007-02-07 19:12:39 · 8 answers · asked by Rachael H 5 in Weather

Really, do you know, because on 1.Jan.2007 it become a member of The European Union ( if you know what is that) and not only that.There are a lot of people from this country who should be famous because they are really good.Haven't you heard of Albena Denkova and Maxim Stavyski ( world champions in figure skating) and Stoichkova ( ex soccer player) ....And in every university in the USA there are at least 2 bulgarian students, so you should know about it .

2007-02-07 19:10:56 · 7 answers · asked by Jade 2 in Geography

I have been going out with my boyfriend for 2.5 years now & we will be having our anniversary on Valentines day. He is in London for another 2 years while I am in Cape Town, what can I get him that will be really special & let him know that I'm thinking of him? Have you got any good, sweet ideas?

2007-02-07 19:10:33 · 3 answers · asked by Juliette D 3 in Biology

when the suns out in the uk, then we are on full alert of heatwave,lol, when it snows the uk news goes crazy, it gets on my nerves, yes im from the uk, why cant people from the uk just respect life and the weather for what it is.

2007-02-07 19:07:47 · 2 answers · asked by emzo2000 1 in Weather

a.at a distance of greater than 10 cm from the lens
b.at a distance of 10 cm from the lens
c.at a distance of less than 10 cm from the lens

2007-02-07 19:03:53 · 3 answers · asked by khanbaba 1 in Physics

Calculate the % acetone,% ethyl alcohol, and water in the solution?

2007-02-07 19:03:43 · 2 answers · asked by ishika65 1 in Chemistry

2007-02-07 19:00:01 · 3 answers · asked by Apoorv g 2 in Mathematics

2007-02-07 18:57:08 · 5 answers · asked by garrettjray 1 in Zoology

what's the difference between a capacitor and a battery?

2007-02-07 18:53:26 · 4 answers · asked by bigK 2 in Engineering

Is leucine the most prevalent amino acid in the universe?

Is leucine more favoured than any other amino acid?

2007-02-07 18:53:19 · 4 answers · asked by The Knowledge Server 1 in Biology

Question: A car dealer has two warehouses, one in Millville and one in Trenton, and two dealerships, one in Camden and one in Doldrum. Every car sold at the dealerships is delivered from the warehouses. On a certain day, Camden sells 10 cars, Doldrum sells 12. Millville warehouse has 15 cars available, and Trenton has 10. The cost of shipping one car is $50 from Millville to Camden, $40 from Millville to Doldrum, $60 from Trenton to Camden and $55 from Trenton to Doldrum. How can the dealer best reduce shipping costs? Namely, how many cars should be moved from each warehouse to each dealership?

I understand there will be 4 variables and I need to reduce to two.

Hint given: the two variables that remain should be the # of cars shipped from the same warehouse (one or the other) to the two dealerships.

The 4 vertices - values - 1080, 1050, 1085, & 1130.

Help!

Thanks!

Shilo

2007-02-07 18:52:10 · 1 answers · asked by Anonymous in Mathematics

Given that a, b, c, A, B, C are real numbers with a, A>0 and B^2-4AC≠0 such that /ax^2+bx+c/ ≤ /Ax^2+Bx+C/ for all real number x. Show that


/b^2-4ac/ ≤ /B^2-4AC/

2007-02-07 18:51:59 · 3 answers · asked by Kraz 2 in Mathematics

Equal amount of water were poured into 2 jars of different capacity, which made one jar 1/4 full and other jar 1/3 full. If the jar with lesser capacity is poured into jar of greater capacity what fraction of the larger jar will be filled with water.

2007-02-07 18:38:51 · 12 answers · asked by rajagopal r 1 in Mathematics