Science & Mathematics - 20 November 2007

http://img104.imageshack.us/img104/281/distilexs3.jpg
Then figure out 120*Tan(A)-120*Tan(B)



It should be fairly simple but whatever i'm doing wrong, I get a negative value

2007-11-20 06:39:02 · 2 answers · asked by Anonymous in Mathematics

Make c the subject:
a) V = (x^2*c)/3

b) V = (c^2*h)/3

c) c - 4e^2= 5 - 2c

2007-11-20 06:38:27 · 6 answers · asked by ra_liv93 1 in Mathematics

The sum of an integer and three times the next cinsective integer is 51. Find the integers.
The sum of a number plus half of itself is 18.25, find the number.
The area of a triangle is 30 sq m. if the base is 15 meters, find the height od the triangle.

2007-11-20 06:35:51 · 4 answers · asked by Maikeru 4 in Mathematics

amonium phosphate
iron (II) oxide
carbon monoxide
calcium chloride
potassium nitrate
magnesium hydroxide
aluminum sulfate
copper (II) sulfate
lead (IV) chromate
diphosphorus pentoxide
potassium permanganate
sodium hydrogen carbonate
zinc nitrate
aluminum sulfite

2007-11-20 06:31:00 · 4 answers · asked by J. Dood 4 in Chemistry

7 An individual heterozygous for a trait and an individual homozygous recessive for the trait are crossed and produce many offspring that are
all the same genotype.
all the same phenotype.
of two different phenotypes.
of three different phenotypes.
9 What do we call a diagram showing several generations of a family and the occurrence of certain genetic characteristics?
Punnett square.
monohybrid cross.
pedigree.
family karyotype.
10 Most of the time, genetic characters are inherited by more complex patterns of heredity including all of the following, EXCEPT
solitary alleles.
incomplete dominance.
codominance.
polygenic inheritance.

2007-11-20 06:29:22 · 2 answers · asked by Anonymous in Botany

Usually, I kill them. But I would prefer to catch them alive, open the window and throw them away. So I can spare their life, just in case it's someone from my family who is reincarnated. I did it a few times with a paper, the spider climb on the paper then I open the window and shake the paper. But it's not always convenient. Is there a better tool?

2007-11-20 06:21:28 · 6 answers · asked by Kitkat 1 in Zoology

1.Air pressure is caused by the mass of the air being pulled down by the __________of the earth over a particular object or the surface.

(^ fill in the blank)
--------------------------------------------------------------------------------

Two of the items in the list below are factors that affect air pressure. Which two?

A. temperature
B. elevation
C. wind speed
D. nearness to a body of water
--------------------------------------------------------------------------------

Changes in air pressure often indicate stable (unchanging) weather conditions.

True
False

2007-11-20 06:16:32 · 3 answers · asked by Anonymous in Weather

True or false?

2007-11-20 06:15:48 · 2 answers · asked by Anonymous in Botany

2007-11-20 06:15:48 · 1 answers · asked by xxxstarswirl 1 in Biology

carchardon carcharias

Carchardon carcharias

Carchardon carcharias

Carchardon Carcharias

2007-11-20 06:14:14 · 6 answers · asked by Anonymous in Zoology

True or Flase?

2007-11-20 06:13:46 · 4 answers · asked by Anonymous in Botany

I have a cheap 10 buck red laser from office max and i wanted to know if you can modify red lasers especially really cheap ones i dont want to modify it to burn through things but just to be able to see the beam would be great because i dont want to waste my money on some like 100 buck laser

2007-11-20 06:13:31 · 3 answers · asked by nedthewaterbottle 2 in Engineering

I want to say male? But this question confuses me. Thanks

2007-11-20 06:12:31 · 3 answers · asked by xxxstarswirl 1 in Biology

For this comet to increase that much in size is incredible, and we still do not know what caused the burst.

The coma is what, only 10 to 20km across. So how did it reach that massive level of size and how fast must the particles be moving to reach that size in such a short amount of time?

Did something impact

Could the gas be expanding due to a jet caused by a fracture?

Why is there no tail?

Are we looking at this comet head on - that would explain why there is no tail.

If something with a tail is coming straight at you - you would not see its tail.

What is the current proven trajectory of this object?

2007-11-20 06:09:49 · 10 answers · asked by scottanthonydavis 4 in Astronomy & Space

2007-11-20 06:09:18 · 3 answers · asked by helenwang123 2 in Biology

2007-11-20 06:09:13 · 2 answers · asked by Anonymous in Physics

My second question is: Describe this process in a single sentence.

2007-11-20 06:05:17 · 3 answers · asked by Hank z 2 in Earth Sciences & Geology

1. Actual rates are much greater than the collision frequency for ideal gas molecules
2. Exothermic reactions always have a larger activation energy for the reverse reaction than for the forward reaction
3. The half-life for a zero-order process decreases as the reaction proceeds
4. The concentration of a catalyst will never appear in a rate law

2007-11-20 06:04:01 · 4 answers · asked by Anonymous in Chemistry

seed is___/16. (yellow and smoth are the dominant phenotype).

2007-11-20 06:02:05 · 1 answers · asked by Tonnie 2 in Botany

a) Is this salt-water combination a mixture, solution, suspension, or emulsion?
b) Explain why no more salt will dissolve in the water.
c) What could you do to this same glass of water to get more salt to dissolve?
d) If you put this glass of salt-water into the freezer, what would you expect to happen to it? (sorry, just saying it will freeze is not enough)

2007-11-20 05:58:32 · 2 answers · asked by Kristyn 1 in Chemistry

biology

2007-11-20 05:54:52 · 1 answers · asked by Tonnie 2 in Botany

How many grams of Mg(OH)2 will be needed to neutralize 25 mL of stomach acid if stomach acid is 0.10 M HCl?

How man mL of a 0.10 M NaOH solution are needed to neutralize 15 mL of 0.20 M H3PO4 solution?

2007-11-20 05:53:17 · 2 answers · asked by BH 1 in Chemistry

And don't say it's not true coz it is.

2007-11-20 05:52:50 · 9 answers · asked by Anonymous in Physics

2007-11-20 05:52:45 · 3 answers · asked by Anonymous in Physics

(5+12i)/(8+9i)

2007-11-20 05:46:08 · 3 answers · asked by evosteo 2 in Mathematics

(5+12i)/(8+9i)

2007-11-20 05:45:45 · 2 answers · asked by evosteo 2 in Mathematics

2007-11-20 05:42:21 · 1 answers · asked by chemistry boy 1 in Chemistry

2007-11-20 05:29:43 · 1 answers · asked by Anonymous in Physics

What is the cathode pH in Co/Co2+(1.00 M)//H1+(x M), H2(1.0 atm)/Pt if E = 0.03 V? Give the pH to 0.01.

2007-11-20 05:29:20 · 1 answers · asked by Anonymous in Chemistry

What is the standard reduction potential of the Y3+/Y redox couple if the cell potential of the following cell at 25 degree C is 1.28 V?

Zn / Zn2+ (0.20 M) // Y3+ (1.2 M) / Y

2007-11-20 05:28:14 · 1 answers · asked by Anonymous in Chemistry