Science & Mathematics - 2 November 2006

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Wearing helmet while riding a bike greatly reduces the force on the skull if a rider is involved in?

a collision. Explain why this is so.....
Please Help me guys my homework......

2006-11-02 17:36:18 · 8 answers · asked by Anonymous in Physics

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Standardization of sodium hydroxide against potassium hydrogen pthalate?

does anyone know how to find the concentration Sodium hydroxide (.10 M) titrated with .700 grams of KHC8H4O4? three trials were titrated to 38.4,37.0 and 36.1 mL

2006-11-02 17:35:37 · 1 answers · asked by Dund pund se 2 in Chemistry

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suppose that a production function is Q=5k^.5l^.5, suppose L=$12,K=$18 find the optimal input choice w/$600?

2006-11-02 17:33:36 · 1 answers · asked by Paul G 2 in Mathematics

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A train carriage travelling at 40 km/h collides and links up with two identical carriages and the three?

contunie moving together. At what velocity will they travel together?
Help my physic homework please guys!!!!!

2006-11-02 17:29:21 · 4 answers · asked by Anonymous in Physics

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can an evolutionist answer this question?

first let me say that i believe in evolution. i am not an ignorant creationist. but this one thing has confounded me. why do you think that people from arabic nations are so hairy in general. they come from a warm climate. i would think hair would have been phased out over time.

2006-11-02 17:26:22 · 7 answers · asked by Anonymous in Biology

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Need help finding coefficient of kinetic friction.?

Stuck on another physics question.

Ice blocks slide with an acceleration of 1.22 m/s^2 down a chute at an angle of 12 degrees below the horizontal. What is the coefficient of kinetic friction between the ice and chute?

I don't know how to solve this since I'm only given the acceleration and degree..

THANKS

2006-11-02 17:25:36 · 3 answers · asked by Clark K 1 in Physics

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What is CONARIANCE SELECTION and its use in REGRESSION MODELS? Any numerical example please.?

2006-11-02 17:23:21 · 2 answers · asked by TAHIR RASHID 1 in Mathematics

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If it were proven our sun was older than current years, would it go supernova & destroy ALL life?

Would we face heat so intense it would melt concrete, burn sand, eat up the earth's atmosphere to where the sky would be on fire? Would God and Mother Nature step in to save earth that we as humans could not do?

2006-11-02 17:21:43 · 13 answers · asked by ZORRO 3 in Astronomy & Space

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How many days would it take to walk 730 km from brisbane to rockhampton if you walked at an average speed of:?

A. 2km/h without stopping?
B. 5km/h for 10 hours each day?
Please Help me My homework world.........

2006-11-02 17:19:52 · 7 answers · asked by Anonymous in Physics

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All of the following are sources of energy during exercise EXCEPT?

a. stored ATP.
b. alcoholic fermentation.
c. lactic acid fermentation.
d. cellular respiration.

2006-11-02 17:17:28 · 2 answers · asked by Anonymous in Botany

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If a cube shape is divided into 2 equal parts, how would its surface area be divided/multiplied?

2006-11-02 17:16:27 · 5 answers · asked by Katie 1 in Mathematics

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i wana know how to become an austronaut and join nasa?

2006-11-02 17:16:01 · 4 answers · asked by Anonymous in Astronomy & Space

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How are cellular respiration and photosynthesis almost opposite processes?

a. Photosynthesis releases energy, and cellular respiration stores energy.
b. Photosynthesis removes carbon dioxide from the atmosphere, and cellular respiration puts it back.
c. Photosynthesis removes oxygen from the atmosphere, and cellular respiration puts it back.
d. all of the above

2006-11-02 17:12:35 · 9 answers · asked by Anonymous in Botany

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When the concentration of molecules on both sides of a membrane is the same, the molecules will?

a. move across the membrane to the outside of the cell.
b. stop moving across the membrane.
c. move across the membrane in both directions.
d. move across the membrane to the inside of the cell.

2006-11-02 17:11:54 · 4 answers · asked by Anonymous in Botany

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y"+y=sin(x)+ (x)cos(x)?

Encuentre un Yp particular de la solución de la ecuación dada

2006-11-02 17:08:35 · 3 answers · asked by Anonymous in Mathematics

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earth & sky is static & sun is in motion?

2006-11-02 17:06:36 · 8 answers · asked by mohsin r 1 in Earth Sciences & Geology

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Time is infinite, what will happen later?

Just take a minute and look at your watch. Notice that as every second passes, it's lost forever. The entire world is moving in time.

My question is this:-
If time is forever, what will happen after humans die?
There will be a point in time where Earth becomes inhabitable. For example, all natural resources are used, too much pollution, the temperature rises so high that the north/south point ices melt and causes massive floods.

Is it true that when humans die, their memories are lost forever? Where do we go after that? Please consider the question carefully before answering. Your answer should not be religion bias.

2006-11-02 17:04:53 · 10 answers · asked by axix 3 in Other - Science

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If a cell is placed in a hypertonic solution, would it shrink or grow? Why?

2006-11-02 17:01:24 · 7 answers · asked by Shushan A 2 in Biology

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can someone help me with this math problem?

i need to find the derivative of the sqrt of (25-x^2). i keep screwing up. thanks for your help.

2006-11-02 16:59:42 · 5 answers · asked by Slevin Kelevra 2 in Mathematics

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My biology book says that "because a cell is filled with salts, proteins, sugars, and other molecules it will

always be hypertonic to fresh water. That means that osmotic pressure should produce a net movement of water into a typical cell that is surrounded be fresh water. If this happens the volume of the cell will increase until it becomes swollen" if it's hypertonic, shouldn't it come out not go in???

2006-11-02 16:56:03 · 4 answers · asked by Shushan A 2 in Biology

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what is the difference between SCADA & DISTRIBUTED CONTROL SYSTEM(DCS)?

2006-11-02 16:54:01 · 1 answers · asked by Karthi K 1 in Engineering

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help on physics?

The force of air resistance acts oppose the motion of an object moving through the air. A ball is thrown upward and eventually returns to the ground.(a)As the ball moved upward, is the net force that acts on the ball greater than, less than, or equal to its weight? why?(b)repeat part (a) for the downward motion of the ball

2006-11-02 16:53:27 · 6 answers · asked by FIGUREsk8er4life 1 in Physics

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Matsh Riddle?

i know i should do my own homework but i need help. My teacher gave i to us for fun.

You have $100 to buy 100 animals
You must buy one of each

Sheep: $10
Pigs: $2
Chickens: $0.50

2006-11-02 16:51:40 · 5 answers · asked by Anonymous in Mathematics

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Can you guys help me with this Bio lab thing PLEASE?

I need you guys to help me write a Discussion explaining what happened and why? and I also need help on the conclusion too.

So mainly the purpose of this is about:Lactase intolerance is cause by a shortage of the enzyme lactase,which is produced by the cells that line the small intestine.They are produced by the cells that line the small intestine.

Hypothesis:If the enzyme is boiled,it will become denatured and no longer function.

Materials:We use strips of paper and we use many different kinds of liquid like gatorade,milk,lactase,milk+lac... water

Procedure:We used strip of paper and we each dipped it in four different kinds of liquid and after that we check if the paper turned into a different color or is the same color.

Discussion:?

Conclusion:
Can you guys please help me with the discussion and Conclusion?PLEASE

2006-11-02 16:50:26 · 2 answers · asked by jaqueline_nguyen 2 in Biology

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fastest animal of the world?

2006-11-02 16:49:31 · 26 answers · asked by natasha_invogue 1 in Zoology

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chemistry balancing?

it's JUST balancing, no half reactions or anything like that
[Cr(N2H4CO)6]4[Cr(CN)6]3 +KMnO4 + H2SO4 --> K2Cr2O7 + MnSO4 + CO2 + KNO3 + K2SO4 + H2O

2006-11-02 16:49:19 · 2 answers · asked by sadfjlhasldf 1 in Chemistry

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How would i take the fine for speeding in my state and graph it, and it has to be a function (algebra II)?

2006-11-02 16:49:18 · 1 answers · asked by Radicular 2 in Mathematics

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If evolution is true, what do expert scientists think domestic animals will look like in a million years?

Or what do you think if you're not an expert scientist and didn't see that special on the Discovery Channel a couple years ago where scientists make educated speculations as to what life would look like millions of years from now. Like a housecat, dog, cattle, etc.

2006-11-02 16:47:49 · 7 answers · asked by Professor Armitage 7 in Zoology

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Where do butterflies go when it rains?

2006-11-02 16:43:40 · 5 answers · asked by xavierwold 2 in Zoology

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Find y^n in the following( second derivative): y=sin(x^2.e^x)?

please answer this soon. . thanks

2006-11-02 16:41:29 · 2 answers · asked by tyshea 1 in Mathematics