Science & Mathematics - 28 November 2006

2006-11-28 07:45:04 · 3 answers · asked by OC2007 2 in Mathematics

What are the advantages of TLC?

How can you improve the mobile phase to allow better separation of amino acids?

How can you estimate the sensitivity of the ninhydrin detection system?

Whats an alternative approach to separate amino acids?

2006-11-28 07:43:52 · 3 answers · asked by Anonymous in Other - Science

This is a quetion that was asked during my physical science class.

2006-11-28 07:42:00 · 1 answers · asked by fsquiabro 1 in Astronomy & Space

I don't understand this and neither does she. If you could explain how to work out these equatios would be greatly appreciated.

SIMPLIFY THE EXPRESSION
1. 9+4r-7

2. 5+(-12t )+ 8t

2006-11-28 07:41:22 · 10 answers · asked by snicks 2 in Mathematics

2006-11-28 07:40:48 · 4 answers · asked by Anonymous in Geography

a. Solve ry+s= tx-m for y. Explain each step in your solution.
b. Would there be any limitations for the value of each variable? If so explain the limitation.

2006-11-28 07:39:49 · 2 answers · asked by patriots15fan 3 in Mathematics

Hi, got stuck on this for my revision:

A chemical company recieves an order to supply 100 tonnes of strontium. They need to calculate how much ore to process.
The ore typically contains 2% by mass of SrCO3.
Calculate the mass of ore that the company would need in order to produce 100 tonnes of Strontium.

1 tonnes = 10^6 g

Thanks!

Harry

2006-11-28 07:39:39 · 2 answers · asked by Anonymous in Chemistry

a. How can you eliminate the fraction from each side of the equation to make finding the solution easier?
b. Write a word problem for the equation.
c. Solve the equation. Explain each step and give the meaning of the answer.

2006-11-28 07:36:16 · 3 answers · asked by patriots15fan 3 in Mathematics

2006-11-28 07:35:57 · 5 answers · asked by Anonymous in Geography

Do you know where does our drinking water come from? And please if you do have web resources or any sources on the net, please share it with me...

2006-11-28 07:34:16 · 6 answers · asked by jann kyle_upvcc 1 in Earth Sciences & Geology

A factory produces 3.75 x 10 to the power of 7 sheets of paper per year. It works 15 hours a day 5 days a week, how many sheets of paper does it produce hourly ? Can someone please help !

2006-11-28 07:34:00 · 8 answers · asked by betty boo 1 in Mathematics

2006-11-28 07:33:09 · 4 answers · asked by WESE 1 in Earth Sciences & Geology

2006-11-28 07:32:53 · 1 answers · asked by Tracy H 1 in Geography

2006-11-28 07:28:48 · 3 answers · asked by Anonymous in Geography

2006-11-28 07:25:46 · 5 answers · asked by gnome 1 in Astronomy & Space

2006-11-28 07:24:52 · 6 answers · asked by ALAN K 1 in Engineering

2006-11-28 07:20:17 · 1 answers · asked by Anonymous in Biology

???? Thank you

2006-11-28 07:18:44 · 5 answers · asked by mimi 2 in Mathematics

you have to solve inequalities by several trasformation

1. -6f+7<2f-9

2. 5/8g-4>2/3g+6

3. 5.4-10.9w

4. -2 1/9d+3/5<-3 2/9d-4 2/5

2006-11-28 07:16:48 · 3 answers · asked by wish on a star 1 in Mathematics

How thick is a silk fiber in micrometres?

2006-11-28 07:16:37 · 1 answers · asked by Anonymous in Engineering

2006-11-28 07:15:42 · 3 answers · asked by wakawaka 2 in Zoology

I am doing a project in chemistry, and i can not seem to find the cost!!!!! please help if you can!!!!!!!! Thanks

2006-11-28 07:13:29 · 5 answers · asked by dphawaii08 1 in Chemistry

2006-11-28 07:08:15 · 7 answers · asked by Anonymous in Astronomy & Space

not many years ago male goats were refered to as 'billies' and females were called 'nannies' now they arer esfered to as bucks and does.why has this customarly usage of gender refrence changed?

2006-11-28 07:07:31 · 6 answers · asked by Anonymous in Zoology

2006-11-28 07:04:45 · 11 answers · asked by Direktor 5 in Zoology

I remember seeing this a long time ago in a series on PBS about architecture.

When an object bends, the upper half in in compression and the lower half is in tension. But at some point between the upper and lower halves the object is bending without being in either tension or compression. What is that point called?

2006-11-28 07:04:43 · 4 answers · asked by panhandlephillips 2 in Engineering

This is for a study guide, and not for a test. I just can't find it in my text book. Please provide to some degree a little detail as to why.
Thanks.

2006-11-28 07:02:17 · 2 answers · asked by Anonymous in Chemistry

2006-11-28 07:02:10 · 14 answers · asked by Anonymous in Mathematics

Quizzes 10%
80
100

HW 20%--- one assignment is still not in but i will put in a 6.5 this is out of 10pts
7.0
5.5
6.5
7.0
7.5
6.5* assuming
Essay 20%
61
68

3 exams each one worth 10%
63
37.5
33.5

there is a final for 20% still have not taken it but i want to see so far
Please help me or at least give me the way to figure it out for my other classes

2006-11-28 07:01:16 · 8 answers · asked by Anonymous in Mathematics

think about it if there are planets where did their componints come from, my theory is that there is something beyond the vastness of space itself like a realm of pure matter or energy.

2006-11-28 07:00:53 · 6 answers · asked by clutchdrive1 2 in Astronomy & Space