Science & Mathematics - 19 September 2007

just looking for a quick and convenient way instead of solving the problems, i have a construction art project to turn in soon.

thanks!

2007-09-19 06:35:31 · 3 answers · asked by Anonymous in Mathematics

I read this somewhere and I know it works with temperature and distance. Does it always work?

2007-09-19 06:34:54 · 4 answers · asked by Dale Nixon 1 in Other - Science

2007-09-19 06:33:46 · 5 answers · asked by Anonymous in Physics

Hello,
Having some trouble getting sharp images and have been messing with the collimation for a while with no real change. It's a Meade DS-2130At long tube.

While looking down the focuser tube, the reflection of objects in the primary are always blurry. If I put my hand or any object within about 2' of the tube opening, the view is much sharper. Anything beyond about 2' is really blurry. The reflection of my eye in the secondary looks crisp always. I'm seeing this while adjusting in doors.

My question is: Is this normal? If it is normal, could you explain why?

To summarize: The doughnut is blurry but the hole is sharp. Is this normal?

Thanks for any information

2007-09-19 06:32:41 · 5 answers · asked by noTunes 1 in Astronomy & Space

1. Which of the following is NOT true for the cellular respiration process?
Question 25 answers T
A>he total amount of ATP that a cell gains for each glucose molecule that enters glycolysis depends on the presence of carbon dioxide.

B>Pyruvate produced during glycolysis enters a mitochondrion during the second stage of cellular respiration.
C>The final electron acceptor in aerobic respiration is oxygen.
D>Acetyl-CoA combines with a four-carbon molecule.
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2. Why do plant cells contain both chloroplasts and mitochondria?

A>In the light, plants are photosynthetic autotrophs. In the dark, they are heterotrophs.
B>If plants cannot produce enough ATP to make sugars during photosynthesis, they can produce it during cellular respiration.
C>Sugars are produced in chloroplasts during photosynthesis. These sugars can be stored in the plant for later use during cellular respiration.

2007-09-19 06:29:26 · 2 answers · asked by Lilly 1 in Biology

2007-09-19 06:28:33 · 2 answers · asked by Anonymous in Mathematics

2007-09-19 06:27:26 · 15 answers · asked by Anonymous in Mathematics

I believe in evolution, cause and effect and I accept most of the mainstream theories of theoretical physics just as much as any scientist. I also believe that intelligent design is a possibility. How does evolution disprove God?
Most of the out spoken atheist have a knee jerk reaction to that theory. They also claim they believe in science but most physists actually believe in God or are agnostics. The angry atheist also claim science uses verifiable facts. That's wrong. Parallel universe, multiple dimension and most of quantum physics theories haven't been proven except through reason. There is also reason behind intelligent design. The big one is 'we're here'. I'm tired of the Angry atheist kindergarten arguments for why they don’t believe in the possibility of God. Grow up. Comparing leprechauns and Santa clause to a god that created the universe?

2007-09-19 06:25:25 · 12 answers · asked by wisemancumth 5 in Physics

A small black rubber ball (radius 0.1 m) is placed at the top of a large white hemispherical dome (radius 10 m). The ball is slightly displaced and allowed to fall/roll/slide down the side of the dome. Calculate the arc length of the skid marks left on the dome’s surface.

Coefficient of friction (static & kinetic), μ = 1
Mass moment of inertia of a sphere, I = 2/5 * m*r^2

2007-09-19 06:21:55 · 2 answers · asked by Dr D 7 in Physics

Consider the following differential equations written in parametric form:
r " – r(θ’)^2 + 2sinθ = 0
r(θ ”) + 2*(r ’)(θ’) + 2cosθ = 0
where (‘) = d/dt
subject to initial conditions
r(0) = 1
r ’(0) = 0
θ(0) = π/2
θ’(0) = -1

Show that the solution can be written in the form:
(rcosθ)^2 + rsinθ = 1

2007-09-19 06:20:49 · 1 answers · asked by Dr D 7 in Mathematics

i have to do a science research project... my topic is the nuclear reactor (Enrico Fermi). the topic has to basically explain what it is from Enrico Fermi's (a scientist) point of view. i only have one week to come up with my poster sketch...

2007-09-19 06:17:56 · 4 answers · asked by JJ 2 in Physics

2007-09-19 06:16:12 · 1 answers · asked by Jacques 2 in Physics

I'm currently doing and iSearch paper and I need a good source for Packaging Engineering. I was originally going to result to UW Stout but they don't have anyhthing on their website. Anyone know any solutions? ;)

2007-09-19 06:15:36 · 2 answers · asked by oblivionnightmare 2 in Engineering

I agree that most cosmetics are dangerous to some degree because there are no regulations, but this seems a bit alarmist.

http://www.cosmeticsdatabase.com/

2007-09-19 06:15:29 · 2 answers · asked by parrisrose 2 in Chemistry

2007-09-19 06:07:48 · 3 answers · asked by Seevan. 2 in Chemistry

11x² - 1056x + 25344 = 0
Please, show the working.

2007-09-19 06:06:46 · 17 answers · asked by Anonymous in Mathematics

2007-09-19 06:05:59 · 3 answers · asked by Jeanette P 1 in Engineering

I'm really confused after not taking a math class in 12 years, please help!

1) ^5sqrt sign 1024x^4y^29

2) 9sqrt sign 108 minus 2sqrt sign 147 minus 3sqrt sign 192

Thanks for your help!!

2007-09-19 06:05:07 · 2 answers · asked by Duckie 26 2 in Mathematics

At a given party there are n different couples. At this particular party, some people shake other peoples’ hands. No one shakes their own hand, and no one shakes his or her spouse’s hand. After
all the handshaking is said and done, Bob asks the other people at the party how many different peoples’ hands they shook. Strangely, he gets a different answer from every person. Prove by
induction that Bob’s wife, Alice, shakes exactly n hands.

2007-09-19 06:00:39 · 3 answers · asked by shakirh 1 in Mathematics

At what rate must a cylindrical spaceship rotate if occupants are to experience simulated gravity of 0.60g? assume the spaceship's diameter is 32m and give answer as the time needed for one revolution. can anybody help me with this question..

2007-09-19 05:55:33 · 1 answers · asked by i-sena 1 in Physics

( (x^-2 y / x^3 y^-4) / (x y^-1 / x^-3 y^2) )^6

it is askig for to mention the above in " positive "times" "

(i'm not good in english terms. not sure what you call the number that comes after sign ^. in my language the number coomes after the sign ^ is called "darshaka", now it is asking to mention this in positive "darshaka", sorry if you got confused with my language. i'm not good in english terms.)

please try to understand and give me a good anser. it is bit urgent. thanks alot.

2007-09-19 05:51:21 · 3 answers · asked by Anonymous in Mathematics

I would like to know how i can develope this , i will appriciate it if you show me step by step.

5x-1+(2x-3)(3x+1)

Thank You

2007-09-19 05:50:19 · 3 answers · asked by Anonymous in Mathematics

2007-09-19 05:42:54 · 1 answers · asked by RABBITTT. 1 in Chemistry

i'm not good in using english terms for maths. what do you say in english for followings, i'll give an ex. pls try to understand and answer me.

x^y (eg: 2^3) - what do you call in englis for this type things (y)

how do you call them when the sign infront of y changes,

eg: x^+y and x^-y

2007-09-19 05:38:59 · 6 answers · asked by Anonymous in Mathematics

Can it be done?

2007-09-19 05:35:17 · 5 answers · asked by sharifjunaid 3 in Botany

2007-09-19 05:34:09 · 8 answers · asked by Anonymous in Physics

the question is "draw the graph of F(x)=3-2x in the domain -1 is equal or less than x is equal to or less than 4"

do i just sub in -1 for x in the formula given get the answer and then the point on the line is -1 and the answer??

cheers!!

2007-09-19 05:32:51 · 5 answers · asked by Anonymous in Mathematics

Small spacecraft travelling in deep space. Not subject to gravitational field

the craft is moving at constant velocity = 250 m/s
in the positive x direction. It fires a thruster for a period of 10 s during which time it gives the spacecraft a constant acceleration of 7 ms^-2 in the negative x direction.
What is the velocity of the craft at the
end of this time (I got v = 180 m/s)

A 2nd thruster is fired which gives the craft a constant acceleration of 12 ms^-2 in the + y direction

1. How long will the 2nd thruster have to fire in order
that the speed of the space craft should reach 300 m/s

2. In what direction is the spacecraft travelling
when this speed is attained

2007-09-19 05:28:00 · 1 answers · asked by   4 in Physics

Find the domain of the function.
h(x) = sqrt(x-2)-log5(10-x)

Differentiate the function
y=cos(e^(Pi(x))

working out would be preferred thanks

2007-09-19 05:22:17 · 1 answers · asked by Anonymous in Mathematics

A satelite moves round the earth at constant speed on a circular orbit of radius 8000 km, with a time period of 120 minutes. Calculate its orbital speed in ms-1.

AS Physics homework, thanks.

2007-09-19 05:21:59 · 3 answers · asked by Anonymous in Physics