Science & Mathematics - 10 July 2007

2007-07-10 13:28:39 · 4 answers · asked by Jason B 1 in Chemistry

any help is welcome!

2007-07-10 13:27:08 · 8 answers · asked by PW_AD_TH 1 in Physics

I read that they have allocated 1 billion dollars over the next ten years. The Russians are proposing a 20 billion dollar manned trip to mars. Could'nt we use that money for education and taking care of human beings here on earth? Maybe re- forestation.

2007-07-10 13:26:19 · 10 answers · asked by easyericlife 4 in Astronomy & Space

find all the solutions/values of the ff. probs: (value/s of x)

1) x + x^(1/2) = 20
2) cube root of x^2 - 1 = x - 1
3) x^-4 - 13x^-2 + 36 = 0
4) (square root of 8x + 7) - x = 0
5) (square root of 11-x) - (square root of x+6) = 3
6) 3(x+3) + (square root of x+3) = 2

Thanks

2007-07-10 13:25:15 · 5 answers · asked by rock-onz 1 in Mathematics

An explanation would be nice. I looked in wikipedia, didn't explain it.

2007-07-10 13:24:54 · 6 answers · asked by Anonymous in Engineering

2007-07-10 13:21:02 · 1 answers · asked by Anonymous in Physics

NASA is continually looking for evidence of life on Mars. With all the probes that we have sent to the Martian surface, if we do find microbes in the Martian soil how will we know they are not just mutated earth bugs that were carried on the spacecraft?

2007-07-10 13:20:41 · 8 answers · asked by Amuse Bouche 4 in Astronomy & Space

h2o2 is a colorless liquid.a concentrated solution of it is used as a source of oxygen for rocket propellent fuels.dilute aqueous solutions are used as bleach.analysis of solution shows that it contains 0.909 mol h2o2 in 1.00l of solution, what is the mass of h2o2 in this volume of solution?

2007-07-10 13:20:04 · 3 answers · asked by Anonymous in Chemistry

Ok.....all of these new words are......heh, new to me. But the process of all of this is something that I think should be more known. .... to us all. ~wink~

Are the anodes that are used in the electralisis process of the making of aluminum recycled after thier 20 day life cycle?

I just saw this all on 'How it's Made' and they didn't say a thing on if these things were recycleable or not......
Really hope that someone can answer this...

2007-07-10 13:17:48 · 2 answers · asked by oodlesoanimals 5 in Earth Sciences & Geology

How do I begin this? The examples in my book are really confusing.

2007-07-10 13:15:39 · 3 answers · asked by Anonymous in Mathematics

A mother is 21 years older than her son.
In 6 years she will be 5 times older than him.

The main question: Where is the father?

Hint: Find the age of the son


I shall reveal this answer in a few days time if there isnt one soon to be revealed.

2007-07-10 13:15:07 · 5 answers · asked by Anonymous in Mathematics

Solve for x? I am really confused because the fractions keep throughing me off. Can anyone help?

2007-07-10 13:13:34 · 3 answers · asked by Anonymous in Mathematics

Find all the solutions of x^4 = 1

thanks..

2007-07-10 13:13:23 · 5 answers · asked by rock-onz 1 in Mathematics

where are you in the world (city/country) and is it raining? theres severe thunderstorm warnings and tornadoe warnings! :|

2007-07-10 13:13:14 · 10 answers · asked by Mrs Cullen :) 3 in Weather

Okay, so I just applied for a new job. As usual they want a drug test.....so I gave a urine specimen.

Then I remembered that the night before, my mom had given me a vicodin for back pain, i've been having. It helped a little and allowed me to sleep okay.

I've never really taken Vicodin before.........But I was wondering....How long will it show up in my system??? I only took One about 9pm on Monday and tested today, Tuesday at 12 noon.

Will it come out positive ????

2007-07-10 13:10:29 · 10 answers · asked by JudoMan77 2 in Medicine

find a third degree polynomial with real coefficients and with zeros 1 and -4+i
the answer given is z^3+7z^2+9z-17

I need the formula to work this problem and then I think I am mostly getting hung up on how to multiply the last part of the problem...I used this formula that someone gave me z-z1*z-z2*z-z3

here is what I did:
(z-1) (z-(-4+i)) (z-(-4-i))
(z-1) (z+4-i) (z+4+i)
(z-1) (z+4)^2 +1
(z-1) (z^2+8z+16+1)
(z-1) (z^2+8z+17)
is this right so far?? if it is then this is where I start having problems, if not then what am I doing wrong??

2007-07-10 13:10:05 · 8 answers · asked by kimmeez 1 in Mathematics

If $156 is divided among three people in the ratio of 1/2: 1/3: 1/4, what is the difference between the greatest share received and the least share received?
A $34.67
B $36
C $39
D $48
E $72

Of the total number of days in a week, what fraction of them occur only 52 times in a leap year?

At a casino there are three tables. The payoff at the first table is 10:1, at the second 30:1, and at the third 40:1. If a woman bets $10.00 at each table and wins at two of the tables what is the difference between her maximum and minimum possible gross winnings?
A $200
B $300
C $400
D $500
E $600

2007-07-10 13:06:39 · 3 answers · asked by Celia 4 in Mathematics

PLEASE HELP!!!!!!!!!!!!!!

2007-07-10 13:03:02 · 2 answers · asked by Anonymous in Mathematics

2007-07-10 13:02:29 · 15 answers · asked by Anonymous in Biology

1. A uniform board is suspended from the ceiling and horizontally by two wires, A and B. The board is 2m long and has a mass of 25kg. What is the tension in each of the two wires when a sign of 35kg is hung on the board a distance of 0.5m from one end?

see picture
http://i23.photobucket.com/albums/b354/Sunshinegirl93534/untitled-4.jpg

2007-07-10 13:01:43 · 2 answers · asked by sunshinegirl93534 2 in Physics

im 21 male i was just prescribed toprol xl for palpitations the dosage is 25 mg..should i take it with or without food does it matter? and also should i take it day or night does it matter?

2007-07-10 13:00:07 · 6 answers · asked by iamloco724 1 in Medicine

Solve the system of equations using the elimination method. Enter the answer as an ordered pair.

x + y = 9
x - y = 7

Can you show work too or how you get the answer? thank you

2007-07-10 12:59:32 · 4 answers · asked by Anonymous in Mathematics

2007-07-10 12:59:09 · 3 answers · asked by Anonymous in Engineering

1. b is not equal to a, then b over (a - b) - a over (b-a) =

Choices:
1. -1
2. 0
3. 1
4. b-a over a-b
5. a+b over a-b

2. 6 equilateral triangles with side 1 are joined to form a hexagon. A circle is circumscribed about the hexagon. What is the area of the shaded region in the figure below?

1. 3.14 - square root 3 over 2
2. 3.14 - 3(sq root 3 over 2)
3. 3.14(sq root 3) over 3
4. 2(3.14) - sq root 3 over 2
5. 2(3.14) - 3(sq root 3)

Thank you for any help. Please explain the reasoning/steps behind it if possible it's appreciated :].

2007-07-10 12:58:00 · 1 answers · asked by RuleOfTheRose 2 in Mathematics

I have been trying to figure it out all day and I just can't. I have emailed a math tutor, I'm still waiting on his response. My professor is going to be conducting an online chat tonight at 10:30 and I plan on being there for that, so don't tell me to do my own homework because I'm trying, I just don't get it! Here's the problem:
I am creating a chart to show a company's revenue. The formula is
Total Costs=Variable Costs + Fixed Costs
C(x)=mx+y
where x represents the number of items produced, m represents the cost to produce each item, and y represents the fixed costs.
These are the graphs I have to create:
Quadratic
Polynomial
Rational
Exponential and
Logarithm.
I could figure out the graphs using Excel but I need the equations. Please don't try to explain it to me using a bunch of math lingo and mumbo jumbo because I don't understand it at all. Just give me the equations.

2007-07-10 12:43:43 · 3 answers · asked by Anonymous in Mathematics

Q9--------------Arjit being party animal wants to hold as many partes among 20 frnds.However his father has warned him that he will be finanancing his parties under following conditions.
-----The inviteis have to be among his 20 best frnnd.
----------He can’t call the same st of frnds to party more than once.
------------The number of invitees to ever party have to be same.

Given these constraints,Arjit wants to hold maximum number of parties.How many frnds should he invite to eac party.
a. 11
b. 8
c. 10
d. 12

2007-07-10 12:35:09 · 2 answers · asked by Anonymous in Mathematics

Q8-------------------Hpw many numbers b/w 200 and 1200 can be formed with digits 0,1,2,3(repetations not allowed).
a. 6
b. 6
c. 2
d. 14

How many numbers can be formed if repetition is allowed.
a. 48
b. 63
c. 32
d. 14

2007-07-10 12:34:21 · 3 answers · asked by Anonymous in Mathematics

I know it has to do with what they eat, but what do both eat?

2007-07-10 12:34:20 · 4 answers · asked by kim j 1 in Zoology

Q1……………>A group of 30 people can complete a job working for 10 hours a day in 15 days.The group starts a work .But at the end of every day ,stararting from the first day ,one person leaves the group and remaining people work for 20 minutes less on the next day.

On which day the work is completed.
a. 28th
b. 29th
c. 30th
d. none

Approx. what part the work remains to be done at the end of 15 days.

a .0.51
b. 0.61
c. 0.49
d. 0.39

On which day will they complete 2/3 of the work.
a. 19th
b. 20th
c. 21st
d. 22nd

2007-07-10 12:28:14 · 3 answers · asked by Anonymous in Mathematics

How long will our buildings and monuments last? Will other life forms take our place? Will it be a better or worse world once mankind is gone? I'm just wondering what your opinion is on this matter. :)

2007-07-10 12:14:56 · 9 answers · asked by Link 5 in Other - Science