Science & Mathematics - 7 February 2007

Ok, I came across this in maths the other day. Say
X=.9'(recuring) So then
10X=9.9' so then subract the first equation from the second,
10X-X=9X and 9.9' -.9' = 9 meaning
9X=9. Now divide that by 9, and
X=9/9
X=1. Makes sense right? However, when we started this we new that X=.9', so if X= both 1 and .9' , that means that 1=.9'
1 is therefore not constant, so that means that maths does not work. Can someone help me with this?

2007-02-07 15:28:30 · 12 answers · asked by The Black Dragon 1 in Mathematics

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Difference between synodic, sideral, nodical and anomalistic months.?

Simplified.

2007-02-07 15:26:47 · 1 answers · asked by bookworm87 4 in Physics

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F1, F2 generations...etc.?

My person's record contains a list of base sequences for genes F, H, A, and G. But my teacher told our class to only copy down the generations and not the base sequences. So the generations are:

F1
F1
H1
H2
A1
A1
G2
G2

..So I'm having trouble answering the questions:

1. Notice that your person's record contains a list of base sequences for genes F, H, A, and G. Why does this record show two sequences for most or all of these genes?

2. The sequences shown are only 30 bases long. Do you think that each sequence represents one complete gene or only a portion of a gene? Explain your answer.

3. What explanation can you offer for the observation that males have only one F gene and never two?

4. Consider genes H, A, and G. For which of these genes are you homozygous? For which are you heterozygous? List two ways in which you can determine this from the information on the screen.

2007-02-07 15:25:13 · 3 answers · asked by M 2 in Biology

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what is the name of the 5th ocean?

my geography teacher says that there is a 5th ocean and the first one to tell her the name gets a prize. I have no clue! What is it?

2007-02-07 15:24:43 · 10 answers · asked by mr.mcfadden 1 in Geography

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Has there been an actual RECORDED death from a copperhead snake bite?

I was told in a college zoology course that there had never be an actual recorded death from a copperhead snake bite. I dont want a bunch of answers saying "YES, there has"... from people that dont really know. If you are not sure about it I don't want your opinion.... i just want the facts!

2007-02-07 15:24:33 · 11 answers · asked by Anonymous in Zoology

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Newton's three laws and the Universal Law of Gravitation. In simple terms.?

2007-02-07 15:24:21 · 2 answers · asked by bookworm87 4 in Physics

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List and describe the forms of energy?

in the spring-mass combination as it bounces up an down:
a. at the lowers point
b. at the center point
c. at the highest point

2007-02-07 15:23:59 · 2 answers · asked by Kitana 2 in Physics

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weather in Wichita little cold for today?

queststion is for kansas tornado season march and april and may .........

2007-02-07 15:23:57 · 2 answers · asked by wether kid 1 in Weather

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CELL DIVISIOn?

How is Mitosis and budding a like a different????thanks so much=)

2007-02-07 15:22:31 · 3 answers · asked by Camisado 1 in Biology

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Kepler's three laws in simple terms.?

2007-02-07 15:22:28 · 2 answers · asked by bookworm87 4 in Physics

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I can't solve this one either! (calculus)?

I only get 1 more chance! Please help.

The equation of the tangent line at (4, f(4))

f(x)= 7x^2

y= [blank]x + [blank]

2007-02-07 15:21:26 · 9 answers · asked by Anonymous in Mathematics

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the sum of two # is 36. one number is 2 more than the other.what r the #s?

show work

2007-02-07 15:20:41 · 15 answers · asked by ititit3 2 in Mathematics

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Difference between stars, galaxies, nebulae, planets, and moons?

Thanks!!!

2007-02-07 15:20:07 · 2 answers · asked by bookworm87 4 in Astronomy & Space

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Testing Hydrogen...?

When you test for Hydrogen gas, another gas is involved as a reactant. What is this gas?

2007-02-07 15:18:08 · 1 answers · asked by Anonymous in Chemistry

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How can you obtain water from ink, vinegar, milk?

I need to do a science project and i need a procedure on how to do this project.

2007-02-07 15:17:00 · 6 answers · asked by tubafreak911 2 in Other - Science

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Addition Postulate ... Long problem.... explanations anyone?

Suppose M is between L and N. Use the segment Addition Postulate to solve for the variable. Then find the lengths of line: LM MN and LN

LM = 3x + 8
MN = 2x - 5
LN = 23

2007-02-07 15:16:56 · 3 answers · asked by ShakeDatLaffyTaffy 2 in Mathematics

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Funny biology joke from my Bio professor....?

What do you call a mushroom with a 10 inch penis?

A fun gi to be with.

Gotta love sexual humor with 60 year old ladies

2007-02-07 15:14:16 · 9 answers · asked by stu12019 2 in Biology

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ANOTHER PHYSICS QUESTION???..... please help me.....?

You are on roller blades on top of a large hill. Your potential energy is equal to 1000 joules. You weigh 60kg (588N). If you start skating down this hill, your potential energy will be converted to kinetic energy. At the bottom of the hill, your kinetic energy will be equal to your potential energy at the top.
What will be your speed at the bottom of the hill?

I really don't understand this. Please help.

2007-02-07 15:13:33 · 5 answers · asked by Jewel 2 in Physics

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How do I express 3grams/cm^3 to kg/m^3?

2007-02-07 15:13:10 · 3 answers · asked by finley036 2 in Mathematics

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Chemical Equilibrium?

I'm having trouble on this question. Any help would be appreciated.

The equilibrium constant for the reaction
AuBr4- + 2Au(s) + 2Br- <--> 3AuBr2-
can be determined by preparing a solution of AuBr4- and AuBr2- in contact with a piece of gold metal. The absorbance of the solution due to AuBr4- is measured at 382 nm. In one experiment, a solution containing a total of 6.41 x10-4 mol/L of dissolved gold (both AuBr4-, AuBr2-) in .4 M of hydrobromic acid was at equilibrium in the presence of gold metal. The total absorbance was found to be .445 in a 1.0 cm cell at 382 nm; however, AuBr2- does not absorb at 382 nm.
In a seperate experiment, the absorbance of 8.54x10-5 M solultion containing only AuBr4- (no AuBr2-) in .4 M HBr was determined in a 1.0 cm cell to be .41 at 382 nm.

1. Calculate the equilibrium concentrations of AuBr4- and AuBr2-.
2. Evaluate the equilibrium constant for the reaction.

2007-02-07 15:11:28 · 1 answers · asked by Anonymous in Chemistry

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