Science & Mathematics - 2 November 2007

I know nothing about fermentation and im trying to a lab report. Any idea on how i should get started?

2007-11-02 09:44:39 · 1 answers · asked by The man of a 1005 holds 3 in Biology

2007-11-02 09:39:37 · 4 answers · asked by Edward E 1 in Astronomy & Space

2007-11-02 09:38:57 · 9 answers · asked by Alexander 6 in Mathematics

2007-11-02 09:38:14 · 2 answers · asked by Anonymous in Chemistry

1. A fishing pole is 8 feet long. What effort force must Sylvia exert at a point 2 feet from the fulcrum end to lift a 2 pound fish?

2. Ian exerts a downward force of 30.0 N and moves that end of a lever down 0.50m, thus lifting the 0.10 m.

a) What is the mechanical advantage of this ideal machine?
b) How much does the load weigh?

2007-11-02 09:38:10 · 1 answers · asked by Anonymous in Physics

An oil refinery is located on the north bank of a straight river that is 2 km wide. A pipeline is to be constructed from the refinery to storage tanks located on the south bank of the river 4 km east of the refinery. The cost of laying pipe is $200,000 per km over land to a point P on the north bank and $400,000 per km under the river to the tanks. To minimize the cost of the pipeline, how far from the refinery should P be located? (Give your answer correct to two decimal places.)

2007-11-02 09:35:18 · 3 answers · asked by Nikki W 1 in Mathematics

2007-11-02 09:34:58 · 4 answers · asked by Saqib Fazal 1 in Astronomy & Space

ok im really hoping u can tell what the shapes below are and if u can tell what they are then can you please tel me which one of them has rotational symmetry
__
|...|
|...L___
|_____ | A

....... ______
........|......___|
........|......|
___|......|
.|______| B

.....___
__|......|__
|_______| C


(ignore the full stops)

thanks in advance

2007-11-02 09:32:01 · 5 answers · asked by MizKrazy 3 in Mathematics

What is the answer 2007^2007^2007^2007?


I only need the last 3 digits. I know the last 2 numbers have to either be 01, 07, 49, or 43.

How would I find this number?

2007-11-02 09:31:58 · 10 answers · asked by neo p 2 in Mathematics

there is evidence to suggest that certain herbs can have an effect on human memory. A researcher plans to use a standardized memory test to evaluate the effect of the herbs. Scores on the standardized test form a normal shaped distribution of, standard deviation 15 and a mean of 70. The researcher obtains a sample on N=25 people and has each person take an herbal supplement every day for 30 days. At the end of the 30 day period, each person takes the standardized memory test and the mean score for the sample is calculated to be M=78


b)identify the critical region for the test assuming that the researcher is using alpha level =.05

2007-11-02 09:30:35 · 1 answers · asked by Anonymous in Mathematics

What is the difference between an acid and a salt? I know that aqueous hydrogen is an acid and aqueous salt has many X+ or X++ in solution. Is acid not a salt because it is made of the same elements as the solution (H+ and OH-)? Gah! This never was my better point in chemistry.

2007-11-02 09:26:24 · 3 answers · asked by Anonymous in Chemistry

2007-11-02 09:25:38 · 3 answers · asked by jarynth5 1 in Mathematics

That is to say if I looked at this with my own eyes from such a distance would it look like this or was this photo touched up with artistic aspects?

2007-11-02 09:23:58 · 10 answers · asked by Bender[OO] 3 in Astronomy & Space

having a binary number, how can I systematically see if it is a multiple of 7? (no conversion possible, binary only)

2007-11-02 09:22:42 · 4 answers · asked by nute 1 in Mathematics

2007-11-02 09:21:20 · 3 answers · asked by Anonymous in Chemistry

2007-11-02 09:20:46 · 5 answers · asked by Alexander 6 in Mathematics

I was thinking that if we attach some sort of gears on the top of the pendulum line, it would be able to produce motion and ultimately we could draw energy from it. This would also be able to be done regardless of weather or sunlight.

Sound good to me, but why dont we do it, or hear about it?

2007-11-02 09:20:23 · 7 answers · asked by Anonymous in Physics

2007-11-02 09:20:04 · 2 answers · asked by Anonymous in Chemistry

Could u guys tell me the answer cus i need it for school. Thanxs

2007-11-02 09:18:39 · 2 answers · asked by Anonymous in Astronomy & Space

2007-11-02 09:16:03 · 10 answers · asked by msellie 3 in Geography

I want to learn QM. Do you have any advice or warnings? websites? books?

thanks.

2007-11-02 09:15:56 · 6 answers · asked by ? 3 in Physics

2007-11-02 09:12:09 · 25 answers · asked by Mary S 1 in Earth Sciences & Geology

A grain laoder can be set to discharge grain in amounts that are normally distributed with mean bushels and standard deviation equal to 26.7 bushels. If a company wishes to use the loader to fill contaianers that hold 2000 bushels of grain and wants to overfill only one container in 100, at what value of mena should the company set the loader?!!

2007-11-02 09:11:37 · 1 answers · asked by Anonymous in Mathematics

2007-11-02 09:11:27 · 13 answers · asked by Chende 4 in Biology

I am interested in the particular mechanism that causes itchiness in an allergic reaction. I am aware that a Type I hypersensitivity reaction (ie. allergic reaction) is due to mast cell degranulation causing histamine release. I am looking for the steps that follow leading to the itchiness (ie. proteins, receptors...) and any biological reason/advantage for this. Thanks!

2007-11-02 09:09:06 · 2 answers · asked by Anonymous in Medicine

I know there are many ways to calculate higher powers of i. Could anyone please tell, and show, me which one works best for you. Which method do you find the easiest and fastest to use.
For example in calculating

i to the 23rd power
i to the 100th power and so on.

Thank you in advanced. Your help is very much appreciated.

2007-11-02 09:05:24 · 10 answers · asked by Anonymous in Mathematics

2007-11-02 08:58:17 · 4 answers · asked by Alexander 6 in Mathematics

2007-11-02 08:57:53 · 13 answers · asked by Anonymous in Astronomy & Space

So my math teacher gave us this problem and I'm having problems trying to figure it out... if anyone knows how to do it, it'd be awesome to know

Two congruent semicricles lie on the diameter of a third semicricl, each tangent to the other two. A small circle in tangent to all three semicircles. If the area of the shaded region is 45pi, what is the length of a radius of the small circle?

2007-11-02 08:57:14 · 4 answers · asked by Markiss 2 in Mathematics

how can i show what happens to the electrons when NaF is formed by ionic bonding

2007-11-02 08:55:30 · 6 answers · asked by Anonymous in Chemistry