Science & Mathematics - 9 December 2007

My essay is on Mercury (element). I want something "cute" if you will, or something funny. Don't point out the obvious and put stuff like "Mercury" or "Mercury the Element"

2007-12-09 08:52:08 · 5 answers · asked by ULikeyDaMuffinz? 3 in Chemistry

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Is TMS safe for the brain?

Have there been tests to see if there is any brain damage at all? I participated in a psychology research study earlier this year. It was only single-pulse TMS in this experiment, NOT repetitive.

2007-12-09 08:49:59 · 1 answers · asked by Anonymous in Medicine

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what is the theoretical percentage of NiCl2 6H2O?

2007-12-09 08:48:25 · 2 answers · asked by Anonymous in Chemistry

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Whats the vertex -7x(squared)-x+6?

2007-12-09 08:46:30 · 1 answers · asked by jack b 2 in Mathematics

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please help... i need this find value math?

see the pic it
please help i need this
http://img527.imageshack.us/my.php?image=maxareauf7.png

2007-12-09 08:45:11 · 1 answers · asked by The Answer 3 in Mathematics

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Two carts with masses of 4.60 kg and 3.04 kg move toward each other on a frictionless track with speeds of 5.37 m/s and 3.35 m/s respectively. The carts stick together after colliding head-on. Find the final speed.

2007-12-09 08:42:17 · 1 answers · asked by Anonymous in Physics

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WINTER, AUTUMN, SPRING or SUMMER?

WHY. GIVE A GOOD REASON FOR BEST ANSWER.

2007-12-09 08:40:58 · 23 answers · asked by bubblebomb 2 in Weather

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what is your idea about "Symmetry"? i just shearche in google and found it's foot print many where..

Qoute"Symmetry surrounds us, both in the natural world and in the world of human artifact. As you walk around in the coming week or two, be aware of the patterns surrounding you-- the arrangement of needles on a pine tree, the sculpture in a hubcap, the vortices in the Mississipi River, the slats in a set of blinds."

related link:
http://comp.uark.edu/~strauss/symmetry.unit/sym.1.1.html

above sentence is jus an example out of penty i found.you my try to search your self to become certain (unless you are not already)

2007-12-09 08:39:42 · 2 answers · asked by Anonymous in Other - Science

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does Magnesium gain weight when burning?

2007-12-09 08:37:24 · 2 answers · asked by Dustin S 2 in Chemistry

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Momentum and Collisions?

A 718 N student stands in the middle of a frozen pond having a radius of 4.7 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 2.8 kg physics textbook horizontally toward the north shore at a speed of 5.5 m/s. How long does it take him to reach the south shore?

2007-12-09 08:35:35 · 2 answers · asked by Anonymous in Physics

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physics question!?

1)what is the weight of a box that exerts a parallel force component of 330 N
and a perpendicular component of 390 N?

2)a net force of 15 N is applied to a cart with a mass of 2.1 kg
a) what is the acceleration of the cart?
b) how long will it take the cart to travel 2.8 m starting from rest?

3)a baseball is hit staright up into the air with a speed of 33 m/s.
a) how high does it go?
b) how long is it in the air?

please show how you did it if you can

2007-12-09 08:34:17 · 1 answers · asked by jolie. 1 in Physics

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math b help?

basically, Barb pulled the plug in her bathtub and it started to drain. the amt of water in the bathtub as it drains is rep. by the equation L= -5t^2-8t+120, where L rep. the number of liters of water in the bathtub and "t" rep. the amt of time in min, since the plug was pulled.

1.How many liters of water were in the bathtub when barb pulled the plug?

2. To the nearest tenth of a min., the amt of tieme it takes for all the water in the bathtub to drain.

I used Axis of symmetry(-b/2a)
any more tips of formulas plz help
Thanks in Advance,
~*God-Bless*~

2007-12-09 08:32:14 · 3 answers · asked by modelgyal91 2 in Mathematics

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estimate the amount of 118% of 5,000.?

2007-12-09 08:30:48 · 5 answers · asked by Mandy P 1 in Mathematics

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PSYCHIC Needed FOR LOST ITEMS...???

about 15 years ago I brought my family movies ( not video tapes ...but movie reels ) from Massachusetts to New York ( Where I live ) to get them put on video. It seems they just dissappeared.

do you know what happened to them?

2007-12-09 08:30:16 · 16 answers · asked by mikey 3 in Parapsychology

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show this step by steps for 10 points?

If f(x)=log (base a) x, show that f(x^a)=a f(x)

2007-12-09 08:28:25 · 2 answers · asked by star baller 360 5 in Mathematics

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A 75 kg box slides down a 25 degree ramp with an acceleration of 3.6 m/s^2. Actual Question BELOW. PLEASE HELP

What acceleration would a 175 kg box have on this ramp?
Can you please show me HOW you got the answer too?
THANK YOU in Advance!!

2007-12-09 08:27:21 · 2 answers · asked by Anonymous in Physics

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What is a mechanical engineer? What jobs do they do and what education must they obtain?

My 14 yr old son is always making things. I'm wondering if mehanical engineering might be something he'd enjoy studying.

2007-12-09 08:24:21 · 3 answers · asked by k/2 1 in Engineering

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Trying to find out what type of Rocks and Minerals I have?

I have a lot of diffrent types of rocks and Minerals and I am trying to find out what the names of these are. If anyone knows of a website that has a chart of rocks and minerals or knows someone that can help me out with this. Thanks

2007-12-09 08:23:41 · 2 answers · asked by shirleyandadam 1 in Earth Sciences & Geology

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Finding the identity of an unknown acid?

Your roommate made a slippery mess of soap all over the place, so you plan to neutralize it with acid. You grab a beaker with 16.3 grams of a STRONG ACID, but when you get to your bathroom, you've forgotten what kind of acid it is and worry about it eating through the pipes.
Naturally you test it to find that:
1) adding a Pb 2+ solution yields a precipitate
2) titrating with 201.5 mL of 1.00 M NaOH neutralizes the acid.

Which strong acid did you pick?
a) HF
b) HCl
c) HBr
d) HI
e) HNO3

I know that it isn't going to be HF because it is a weak acid, and I know that it won't be HNO3 because Nitrates are soluble. So it has to be HCl, HBr, or HI because the all form precipitates with Pb 2+. I just don't know how to use the titration data to deduce the identity of the acid.

2007-12-09 08:21:26 · 1 answers · asked by Guinness 3 in Chemistry

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Conservation of Mechanical Energy?

A child on a 5.00 m long swing has a speed of 4.00 m/s at the bottom of the swing. What angle will the swing make with the vertical when the child reaches his highest point in the swing?

I think that the child has no potential energy in the beginning and has no kinetic energy at the end, but i dont know what to do then.

2007-12-09 08:20:28 · 1 answers · asked by Anonymous in Physics

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