Science & Mathematics - 4 December 2006

Is a solution of NaHCO3 and Na2CO3 a buffer solution? The answer is yes.

Then we have to explain using chemical equations:

NaHCO3 +H20--> H3O+ +Na2CO3

I dont know if that is correct.

2006-12-04 09:37:25 · 1 answers · asked by Dan 2 in Chemistry

what are all the names of the weather fronts?

2006-12-04 09:36:02 · 5 answers · asked by Anonymous in Weather

2006-12-04 09:35:51 · 8 answers · asked by danielles_thoughts 1 in Biology

2006-12-04 09:35:13 · 4 answers · asked by Anonymous in Physics

i.e. R for real numbers

2006-12-04 09:33:59 · 2 answers · asked by inthecrossfire 2 in Mathematics

I understand that nuleotide polymorphism can arise by the mutation of already existing nucleotides, but how do you get from a simple organism with few genes to a complex one with many?

Most of the arguments in favour of ID are pretty easy to counter, but I'm stuck on this one.

2006-12-04 09:33:42 · 8 answers · asked by Anonymous in Biology

2006-12-04 09:33:32 · 4 answers · asked by IanAttkins 1 in Mathematics

(10101)b = 10101 to the base b.

ie, if b=2, then 10101 = 2^0 + 2^2 + 2^4.

2006-12-04 09:32:14 · 2 answers · asked by IanAttkins 1 in Mathematics

2006-12-04 09:32:13 · 1 answers · asked by cuper52583 1 in Mathematics

im sure there is a way to determine how much energy is needed to move a body of mass. id like to know how much is need to shift a sphere with a mass of 5.9742×10^24 kg, assuming that there is no wind, gravity, or any other force that could cause friction. anyone know how i can come to an answer?

2006-12-04 09:31:54 · 2 answers · asked by Anonymous in Physics

2006-12-04 09:31:00 · 3 answers · asked by crystal o 1 in Mathematics

2006-12-04 09:29:53 · 6 answers · asked by holly 1 in Astronomy & Space

antenna tower refered for a cb antenna to hold vertical or horizonal beam antennas that can weigh up to 30 to 70 pds.

2006-12-04 09:29:32 · 1 answers · asked by ltnscorpionking 2 in Engineering

Assume that large, free earlobes are controlled by the dominant allele (F) & attached earlobes by the recessive allele (f). In addition, the ability to curl the tongue into a U shape is regulated by the dominant allele (T) & the recessive allele (t) produces NON tongue rolling condition. These genes are on separate chromosomes; hence they assort independently.
a- A woman who is a free-earlobed tongue roller marries a man who has attached earlobes and is a Non tongue roller. Their only child, a boy has attached earlobes & can't roll his tongue. What are the genotypes of his mother, his father, and the boy?
b- For the Above situation,Show a Punnett square for the mating of a male who is heterozygous for Both traits & a female who is homozygous recessive for both traits. What are the Genotypic & Phenotypic ratios of this mating?
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I think I have to make a dihybrid with FT-Ft-fT-ft & I think the boy & dad- homozygous recess. & Mom= heterozygous.Idk how to show all of this though.

2006-12-04 09:29:11 · 1 answers · asked by Miss*Curious 5 in Biology

When atoms are bonded together covalently what two kinds of structure may result?
And How is a coordiante covalent bond diffrent from an ordinary covalnet bond?

2006-12-04 09:28:33 · 1 answers · asked by Ballerina 5 in Chemistry

2006-12-04 09:28:32 · 7 answers · asked by LiiL J 1 in Mathematics

Assuming the general theory of relativity is correct, what is the total mass energy percentage of "dark energy" in the universe? what about "dark matter"?

2006-12-04 09:28:13 · 109 answers · asked by pghpanthers2 2 in Astronomy & Space

n E N = > n is an element of the set of natural numbers

2006-12-04 09:28:06 · 2 answers · asked by IanAttkins 1 in Mathematics

i need this for a project...thanx

2006-12-04 09:27:03 · 4 answers · asked by ricky_272004 2 in Zoology

Why? Us humans fight with each other in wars killing one another as for other races such as cats don't do that.....

2006-12-04 09:25:41 · 6 answers · asked by kogmu 3 in Biology

2006-12-04 09:24:59 · 1 answers · asked by IanAttkins 1 in Mathematics

I have this idea, that if we take just several hundred hydrogen bombs, each with a 100 megaton output, and detonate them all at the same time at one location, we could first of all knock the earth off its orbit. if we carefully pick the right location and time of day and time of year, we could send earth flying near other planets or moons. the gravity of the earth would shift the other planets off their orbits as well. to take care of venus and mercury, we could wait till they are both relatively close to the earth, then with the use of nuclear devices we could propel the moon to get near them both and intercept their orbits, attempting to lead them off their paths as well(they are both small planets), preferably towards the sun. the only hard part would be jupiter, since it would take so much gravity to get that big guy to move its a$$. the least we could accomplish is send the moon flying towards venus in a way that both would fly to the sun, preferably hitting mercury on the way...

2006-12-04 09:24:51 · 7 answers · asked by Anonymous in Astronomy & Space

2006-12-04 09:23:53 · 6 answers · asked by IanAttkins 1 in Mathematics

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2006-12-04 09:22:40 · 4 answers · asked by Carleigh W 1 in Biology

tickets to a localmovie were sold at $3.00 for adults and $1.50 for students. if 134 tickets were sold for a total of $351.00, how many adult tickets were sold?

2006-12-04 09:22:25 · 4 answers · asked by Elsa R 1 in Mathematics

i need hep with some math questions

2006-12-04 09:21:10 · 6 answers · asked by fantasia1drive 2 in Mathematics

4x+4y=3
y=-x

2006-12-04 09:20:30 · 6 answers · asked by Elsa R 1 in Mathematics

3x-2y=11
x+y=7

2006-12-04 09:19:01 · 8 answers · asked by Elsa R 1 in Mathematics

demanufacture in engineering

2006-12-04 09:18:50 · 2 answers · asked by Anonymous in Engineering

2006-12-04 09:18:16 · 2 answers · asked by bernie gz 1 in Other - Science