Science & Mathematics - 19 December 2006

A solid mixture containing only sodium chloride and sodium nitrate has a mass of 4.000g. When this sample is dissolved in water and excess silver nitrate is added, 4.590g of solid silver chloride is formed. Calculate the percent mass of sodium chloride in the original 4.000g mixture.

2006-12-19 19:44:17 · 2 answers · asked by Jay 2 in Chemistry

what ever we eat is composed of electrons protons and neutrons(fundamental particles) it mean we eat these fundamental particles.
they actually are tasteless then how how after combining into a substance they give it a taste.
and still further how these fundamental particles combining in different ways impart different tastes to different substances

2006-12-19 19:39:05 · 6 answers · asked by hash 1 in Physics

2006-12-19 19:38:21 · 8 answers · asked by linda 1 in Mathematics

2006-12-19 19:34:56 · 2 answers · asked by sri_july27 2 in Mathematics

2006-12-19 19:28:54 · 2 answers · asked by Ryan C 1 in Engineering

I am actually doing a research on The tendency of spinach in reducing obesity. So I need to know what is the content in spinach that can reduce obesity and what causes obesity .

2006-12-19 19:26:09 · 16 answers · asked by aei_me 1 in Biology

types of event,combination,permutation,theorms of probablity,bayes theorm

2006-12-19 19:17:55 · 5 answers · asked by Anonymous in Mathematics

I've got a pretty good arm.

2006-12-19 19:15:42 · 9 answers · asked by henri 1 in Astronomy & Space

The Muhibbah Company is a manufacturer of cylindrical aluminium tins. The manager plans to reduce the cost of production. The production cost is proportional to the area of the aluminium sheet used. The volume that each tin hold is 1000cm cube (1liter).
1. Determine the value of h, r and hence calculate the ratio of h/r when the total surface area of each tin is aluminium. Here, h cm denotes the height and r cm the radius of the tin.
2. The top and bottom pieces of the tin of height h cm are cut from square-shaped aluminium sheets.
Determine the value for r, h and hence calculate the ratio h/r so that the total area of the aluminium sheets used for making the tin is minimum.

top surface


h cmcurved surface


bottom surface

3. Investigate cases where the top and bottom surfaces are cut from
i) Equilateral triangle
ii) Regular hexagon
Find the ratio of h/r for each case.
Further Investigation
Investigate cases where the top and bottom faces of the tin are being cut from aluminium sheets consisting shapes of regular polygon. From the results of your investigation, what conclusion can you derive from the relationship of the ratio of h/r and the number of sides of a regular polygon?
Wastage occurs when circles are cut from aluminium sheet, which is not round in shape. Suggest the best possible shape of aluminium sheets to be used so as to reduce the production cost.

2006-12-19 19:11:17 · 3 answers · asked by miss_ooO 2 in Mathematics

I just want to know exactly what each step implies.

2006-12-19 19:07:59 · 3 answers · asked by Soubi 1 in Chemistry

2006-12-19 19:05:56 · 4 answers · asked by krunal 1 in Physics

2006-12-19 19:03:30 · 9 answers · asked by gino 1 in Astronomy & Space

4). Determine which salt (sodium, aluminum, or calcium chloride)you should use to melt the ice most effectively. Explain your answer and write pertinent equations.

any websites suggestions? please?

2006-12-19 19:03:11 · 0 answers · asked by Anonymous in Chemistry

I know it is a theory that scientist claim about procreation.

2006-12-19 19:02:35 · 8 answers · asked by CARMEN S 1 in Biology

What is the next number?

2006-12-19 18:54:53 · 9 answers · asked by hamed 1 in Mathematics

2006-12-19 18:54:19 · 5 answers · asked by suchi 1 in Mathematics

2006-12-19 18:44:36 · 8 answers · asked by amjad a 1 in Zoology

Telllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll Meeeeeeeeeeeeeeeeeeeeeeeeeeee

2006-12-19 18:39:42 · 8 answers · asked by hamna s 1 in Chemistry

Wanted to know if possible to do without a table of sines, cosines, etc. If it simplifies answer, than one angle may be known.

2006-12-19 18:39:02 · 8 answers · asked by antoinebucher 1 in Mathematics

I mean at least a 1 out of 100? Can U give me a site that explains it?

2006-12-19 18:29:21 · 11 answers · asked by Anonymous in Weather

Look at the dividing line between the Mountain Time Zone and the Pacific Time Zone between Oregon and Idaho. What's up with the strange hook into Oregon?

2006-12-19 18:25:44 · 7 answers · asked by Tim C 1 in Geography

2006-12-19 18:24:58 · 3 answers · asked by ayesha 1 in Mathematics

2006-12-19 18:21:33 · 7 answers · asked by nisha 1 in Biology

2006-12-19 18:21:22 · 11 answers · asked by damodharan c 1 in Botany

i was given the matrices: P=[{3,1}{1,3}] and S=[{4,2}{2,4}].
the problem then said: P^2=[{2,1}{1,3}]^2=[{10,6}{6,10}]=2[{5,3}{3,5}]; and S^2=[{4,2}{2,4}]^2=[{20,16}{16,20}]=2[{10,8}{8,10}]. Calculate P^n and S^n for other values of n and describe an patterns you observe. Can anyone help? i can't find any patterns. thanks!!!

2006-12-19 18:20:58 · 6 answers · asked by Anonymous in Mathematics

2006-12-19 18:18:20 · 7 answers · asked by ganesah g 1 in Other - Science

2006-12-19 18:17:14 · 6 answers · asked by jimbo11418 1 in Biology

Has anyone taken this college course? Is it hard? I struggle in math, and i am taking this class next semester... how hard is this stat math class?

2006-12-19 18:15:58 · 3 answers · asked by senor_cheese04 1 in Mathematics

I have a friend who enjoys Christmas lights during the season, but is upset that these lights disturb the natural rhythm of plants' sleep. I was wondering if her claims had merit. I don't want to say anything contrary until I have some facts from an expert or someone connected to an expert. If you have sources, or have a certain related educational or occupational background that is related to this topic, please include that in your answer.

2006-12-19 18:13:04 · 8 answers · asked by wakon7 2 in Botany

reactive power in a current is useless energy that will never be used, if it is also measured by the meter isn't that cheating the consumer since only real power is used from the electrical current

2006-12-19 18:12:36 · 4 answers · asked by John A 1 in Engineering