Science & Mathematics - 2 July 2007

I have a lab where the only info given is the distance a rubberband stretches. And I need to find the force (N) that the rubberband exerts. Can someone help me out on the first one? The rubberband stretches 10.4 cm. The professor said I can't use Hookes Law due to the fact it is hard to determine the equilibrium of a rubberband? What is another formula I can use?

2007-07-02 04:40:22 · 5 answers · asked by benzene boy 1 in Physics

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What are other binary stars like Albireo?

also, are there any other binary stars with each star giving off a different color?

2007-07-02 04:38:47 · 6 answers · asked by Anonymous in Astronomy & Space

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Is it possible to lose senses other then sight or hearing?

I know people can go blind or deaf but is it possible/ever happened to lose your other three senses, ie touch, taste or smell?

2007-07-02 04:37:56 · 8 answers · asked by christopherauk 2 in Biology

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Can anyone give me facts on global warming?

I want to know the number of scientists whose careers are based on exploring climate change, and how many support global warming and how many deny it.

2007-07-02 04:34:10 · 2 answers · asked by jake k 2 in Earth Sciences & Geology

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Suggest any photoactive emulsion for screen printing which after exposing wont get washed with HNO3 & water.?

I want to use this photoactive emulsion directly upon metal sheet to expose my designs and then will do acid etching of exposed metal part... please suggest, thanks.

2007-07-02 04:30:48 · 1 answers · asked by hrishi 1 in Chemistry

2 ⤊

Average velocity of projectile?

Find the average velocity of projectile betweem the instants it crosses half the maximum height. it is projected at an angle theta with the horizontal at speed u.

2007-07-02 04:29:56 · 5 answers · asked by rock_bottom456 2 in Physics

15 ⤊

Comet question:If comets are made with heat and pressure, wouldn't that mean there are diamond-like objects?

Comets were made under heat and pressure. So are diamonds. See what I'm going at?

2007-07-02 04:24:03 · 15 answers · asked by Anonymous in Astronomy & Space

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easy question for everyone to answer!! just give it a shot...give ur views!!.. want 100 ans!!?

how do u guys find the energy within to move on with ur daily activities??
sometimes u just get pissed off in a day....
u cannot move on...its so boring...i am studying !!
how to u get the energy to move on?? how to u get the interest. please suggest as many ways as possible.

2007-07-02 04:22:04 · 13 answers · asked by Anonymous in Other - Science

0 ⤊

Math problem!?!?

What does state the inverse mean? here are some example problems..
1. State the inverse of the following:
a) subtract 27
b) divide by -6
c) mutiply by 14

2007-07-02 04:19:00 · 7 answers · asked by ♥♥♥ 2 in Mathematics

0 ⤊

which is stronger? Ethanoic acid or 'Tris' acid?

how does the parameters of pKa and Ka determine which is stronger?

2007-07-02 04:17:20 · 3 answers · asked by sharen s 2 in Chemistry

2 ⤊

what r the qualification for aeronatical engineering?

2007-07-02 04:15:06 · 7 answers · asked by Anonymous in Engineering

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What's wrong with the Eastern forests? What's being done?

On a recent trip across Pennsylvania and Ohio, I noticed that many trees are dying and that the invasive tree of heaven seems to be taking over.

What is wrong?
Is anyone doing anything?
What can be done?

2007-07-02 04:13:57 · 1 answers · asked by Austin W 3 in Botany

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a pharmacist is mixing a 3%saline sol.& an 8%saline sol.to get 2 litres of a 6% sal.sol. how much of each sol.

a math question .please help.

2007-07-02 04:12:29 · 5 answers · asked by elva f 2 in Chemistry

4 ⤊

Do other animals(Not humans) Laugh?

If you can give a example please.

2007-07-02 04:11:09 · 25 answers · asked by Anonymous in Zoology

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you wanted to determine how closely related two modern day organisms are, which of the following would be good

A. Doing radioactive dating
B. Comparing embryo morphology
C. Looking for structural and genetic similarities
D. Comparing their fossil records

2007-07-02 04:11:00 · 4 answers · asked by chrisdesign40 1 in Biology

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chem I questions?

5. Determine the number of moles of Krypton contained in a 3.25 liter gas tank at 5.80 atm and 25.5 °C. If the gas is Oxygen instead of Krypton; will the answer be the same? Why or why not?

1.
If the outside of the flask is not dried after vaporizing the liquid, will the unknown's calculated molecular weight is too high or too low? Explain?
2.
Suppose the atmospheric pressure is assumed to be 1 atmosphere instead of its actual value. How wills this error affects the molecular weight of the unknown? Explain.
3.
If the vapor's volume is assumed to be 125 mL instead of the measured volume, what is the percent error of the unknown's calculated molecular weight? Show your work.
4.
If the entire unknown does not vaporize in the 125 mL Erlenmeyer flask, will the reported molecular weight be too high or low? Explain.

2007-07-02 04:09:59 · 2 answers · asked by Anonymous in Chemistry

1 ⤊

Any tree or botony experts?

Can anyone guide me to a free, illustrated online encyclopedia that will help me identify trees? Also, I need a general one for plants.

2007-07-02 04:09:46 · 2 answers · asked by Austin W 3 in Botany

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If an ethanol burner puts out 13000 btu's, is it safe to use colored glass only safe to 1200 degrees?

Looking to use an ethanol burner in my fireplace which puts out 13000 btu's, hoping to place on the burner decorative colored glassel products which are only safe to 1200 farenheit. Is the glass safe to use on the ethanol burner?

2007-07-02 04:04:30 · 2 answers · asked by CARL F 1 in Chemistry

1 ⤊

How do you deal with bats in the home?

I have bats that come into my house obviously at night time, usually one a night and I think I know where they are coming from. What is the cheapest way to solve a bat problem?

2007-07-02 04:02:19 · 4 answers · asked by ? 2 in Zoology