Science & Mathematics - 28 January 2007

Have I got this right?
Intracellular concentration of Ca++ is 90 mg/l

Assume mw of Ca is 40.

Then is it 2.25 millimole/litre?

2007-01-28 17:32:06 · 3 answers · asked by Anonymous in Chemistry

2007-01-28 17:32:05 · 2 answers · asked by rina j 1 in Chemistry

Is this data reliable to study global warming?

2007-01-28 17:30:26 · 3 answers · asked by Yukon Cornelius 2 in Earth Sciences & Geology

2007-01-28 17:30:24 · 8 answers · asked by sasuke 1 in Biology

1. What is the quotient of y-5/ 2y^2-7y-15?

2. What is the quotient of b^3+4b^2-3b+126/ b+7?

3. What is the quotient of d-2/ d^4-6d^3+d+17?

THANKS

2007-01-28 17:30:15 · 6 answers · asked by Yisi 3 in Mathematics

in terms on biology.

2007-01-28 17:27:06 · 6 answers · asked by reggie 1 in Biology

I asked is there an end to the sea so somebody answered no!!! the earth is round so there is no end to the sea. can somebody tell me why is that if the earth is round there is no end to the sea. The sea is inside the earth and they say there is no end to it how is it possible...?

2007-01-28 17:26:30 · 6 answers · asked by tomsmart 1 in Earth Sciences & Geology

2007-01-28 17:25:07 · 6 answers · asked by chardonnayii 1 in Biology

If a person has just a CD ROM Drive or a CD Writer in his/her system,is it possible to play a DVD Disc drive on his PC.If yes,then how?Suggest some ways.

2007-01-28 17:23:36 · 4 answers · asked by tej 1 in Engineering

At 25C the heat of fusion of aluminum is 10.6kj/mol adn the heat of sublimation is 326.4kj/mol. what is the heat of vaporization at 25C?
a. 158.2kj/mol
b. 169.5kj/mol
c. 315.8kj/mol
d. 337.0kj/mol
i have the worst teacher!

2007-01-28 17:22:46 · 1 answers · asked by Shawn 1 in Chemistry

2007-01-28 17:21:31 · 11 answers · asked by Anonymous in Engineering

Use the remainder theorem and the factor theorem to determine whether (b+4) is a factor of (b^3+3b^-b+12)

A. The remainder is 0 and, therefore, (b+4) is a factor of (b^3+3b^-b+12)

B. The remainder is 0 and, therefore, (b+4) isn't a factor of (b^3+3b^-b+12)

C. The remainder isn't 0 and, therefore, (b+4) is a factor of (b^3+3b^-b+12)

D. The remainder isn't 0 and, therefore, (b+4) isn't a factor of (b^3+3b^-b+12)



2. Use the remainder theorem and the factor theorem to determine whether (c+5) is a factor of (c^4+7c^3+6c^2-18c+10)

A. The remainder is 0 and, therefore, (c+5) is a factor of (c^4+7c^3+6c^2-18c+10)

B. The remainder is 0 and, therefore, (c+5) isn't a factor of (c^4+7c^3+6c^2-18c+10)

C. The remainder isn't 0 and, therefore, (c+5) is a factor of (c^4+7c^3+6c^2-18c+10)

D. The remainder isn't 0 and, therefore, (c+5) isn't a factor of (c^4+7c^3+6c^2-18c+10)


THANKS

2007-01-28 17:20:59 · 3 answers · asked by Yisi 3 in Mathematics

There is this "is over of" method using proportions that someone showed me once. How does that work?

2007-01-28 17:20:53 · 11 answers · asked by girl_next_door 2 in Mathematics

if big bang had occured as praposed 12 billan years ago it was definatly very hot inceident ,now we say that back ground radiation which echoing in arround us is from big bang but why is cool radiation

2007-01-28 17:19:19 · 7 answers · asked by Dr Umesh Bilagi 2 in Astronomy & Space

how do you convert 140 degrees into radians? Thanks

2007-01-28 17:16:34 · 7 answers · asked by Slevin Kelevra 2 in Mathematics

The position of a 2.75 x 10^5 N training helicopter under test is given by r = (0.020 m/s^3)(t^3)i + (2.2 m/s)(t)j - (0.060 m/s^2)(t).

Find the net force on the helocopter at t = 5.0 sec.

Express the vector F in the form Fx, Fy, Fz.

2007-01-28 17:16:31 · 2 answers · asked by Amanda 2 in Physics

2007-01-28 17:15:26 · 3 answers · asked by SHIV 1 in Earth Sciences & Geology

When the very top of the domino hit something stationary, the momentum of the domino is the mass times the velocity of the top of the domino, or the momentum is the mass times the velocity of the centre of the mass?

2007-01-28 17:09:44 · 1 answers · asked by 3.141592653589793238462643383279 3 in Physics

How could one estimate how much resistance all the steel, concrete, would have been as opposed to air. Why would the buildings only fall straight down without toppeling to one side or the other? No politics or emotional answers only science please.

2007-01-28 17:07:52 · 9 answers · asked by captpcb216 2 in Engineering

if rat poison and harsh chemicals are some of the ingredients ,what else is in there,and how is that then made edible?and if i,who knows very little about drugs,has heard this then surely the type who buy it would be aware of this too. i wouldnt touch it let alone eat it! can someone enlighten me a little?,

2007-01-28 17:06:56 · 6 answers · asked by pugsaleena 4 in Chemistry

A snake farm advertises that 25% of their snakes are longer than 1.5m and 10% of them are longer than 2m. what is the mean length of snakes at this farm? what is the standard deviation?

please help me to solve this question. thank you! =)

2007-01-28 17:02:24 · 1 answers · asked by winyimudmud 1 in Mathematics

2007-01-28 17:01:02 · 26 answers · asked by tyeserhule 1 in Mathematics

I have completed the rst of the 40 question test but I can not figure this one out please help me.

Complete the following statement x^2+13x+42=(x+6)(? ?)

I have went throguh the book a hundred times and I can not find an example problem or anything dealing with this kind of problem. THanks for any help given.

2007-01-28 17:00:56 · 9 answers · asked by Tasha J 1 in Mathematics

greenlands in africa

2007-01-28 17:00:44 · 3 answers · asked by Nithya R 1 in Geography

It's like 50 billion degrees here in Australia...boiling hot...

2007-01-28 16:57:44 · 17 answers · asked by ♠EmilyJayne♠ 4 in Weather

2007-01-28 16:57:30 · 4 answers · asked by Alex 2 in Biology

2007-01-28 16:57:28 · 9 answers · asked by vashistha291984 1 in Earth Sciences & Geology

2007-01-28 16:56:31 · 3 answers · asked by Anonymous in Biology

topic for seminar
can i get some ideas!

2007-01-28 16:55:23 · 4 answers · asked by mahy 1 in Botany

x2y z
___ . ___
z2 xy

x squared y AND z squared

What are the steps???

2007-01-28 16:54:44 · 4 answers · asked by Guy Who Brushes His Teeth* 6 in Mathematics