Science & Mathematics - 9 February 2007

2007-02-09 06:28:47 · 7 answers · asked by Anonymous in Zoology

whats the difference between endocrine system and endocrine gland??

2007-02-09 06:28:23 · 2 answers · asked by Little Mona Lisa 1 in Biology

Let X be the maximum of the two number that comes up.
1.) what is the distribution of X
2.) Find the expression E[X], the variance Var[X], and the standard deviation.

2007-02-09 06:27:01 · 3 answers · asked by Maasupian 1 in Mathematics

pls write the explanation of the solution

2007-02-09 06:24:36 · 7 answers · asked by Anonymous in Engineering

2007-02-09 06:23:43 · 10 answers · asked by Anonymous in Zoology

2007-02-09 06:23:10 · 3 answers · asked by fateema a 1 in Botany

2007-02-09 06:23:06 · 2 answers · asked by Rachel F 1 in Geography

How many grams of water vapor are formed if 15.0 liters of ethane are burned?

Can you show me the work also? I want to see the solving process as well as the answer so I can understand how to get to the answer.

2007-02-09 06:22:38 · 3 answers · asked by Anonymous in Chemistry

a: sieve in the madreporite
b: andoskeleton
C: suction in its tube feet
d: eye spot
which answer is correct ?

2007-02-09 06:21:13 · 1 answers · asked by Anonymous in Biology

what's the answer to this?
(3 + 4) / (2 - 1) =

2007-02-09 06:16:47 · 20 answers · asked by K C M J 3 in Mathematics

18. The valence of aluminum is +3, and the valence of chlorine is -1. The formula for aluminum chloride is correctly written as


A. Al3Cl.
B. AlCl3.
C. ClAl3.
D. Cl3Al.

2007-02-09 06:14:16 · 7 answers · asked by tami c 1 in Chemistry

ie. electrosensitivity?

2007-02-09 06:13:31 · 4 answers · asked by Dudeberry 2 in Engineering

Nine men and two boys, trekking through the jungle, need to cross a river. They have a smal inflatable boat and it's easy enough to row it across the river. The boat, however, can hold no more than one man or the two boys. Can they all get across? If so tell me how many total crossings it takes for everyone to get across. (Going from one side of the river to the other counts as 1 crossing)

I already know the answer and the first one who gets the answer correct will earn the best answer of this answer!!!

2007-02-09 06:12:28 · 6 answers · asked by pooridiot007 1 in Mathematics

i know the formula and everything, but i just can't seem to be able to find the answer

2007-02-09 06:12:20 · 9 answers · asked by Kathy M 1 in Mathematics

2007-02-09 06:10:49 · 6 answers · asked by Source 4 in Biology

as every universal activity follow a routine cycle, big-bang is also a routine phenemenon. before big-bang cosmic particle must have been accumulating in a single gravitational forse(as in black hole). before that a different universe might in existanse as we have now........

2007-02-09 06:09:45 · 16 answers · asked by Anonymous in Astronomy & Space

Hello,

I need some more clarification on a question I asked earlier.

Here's the problem:

Prove by induction on n that, n^3<=2^n for n>=10 a positive integer.

First, Thank you Pascal and rhsaunder...

Pascal. I am being taught to solve these proofs very similar to the way you solved the problem. I need some clarification if I can.

Here is what I have so far.

P(n): n^3 <= 2^n for n>=10 a positive integer.

Step 1: Let n=10 so I get 10^3 <= 2^10 which is 1000<=1024

Step 2: Assume P(k) is true for n=k
So, k^3<=2^k (Ind. Hyp.)

Step 3: Must show P(k+1) is true. Let n=k+1
So, (k+1)^3<=2^(k+1)
We know k^3<=2^k
From here 2k^3<=2^k*2
Which is 2k^3<=2^(k+1)

Then:
(k+1)^3 = K^3+3k^2+3k+1=K^3+(9K^2+9k+3)/3

From here I get lost when I introduce n>=10.

Need clarification on this - Since n≥10, 9n² < n*n²=n³, and likewise 9n < n³ and 3 < n < n³.

Then:
n³ + (9n²+9n+3)/3 < n³ + (n³+n³+n³)/3
n³ + (n³+n³+n³)/3 = n³+n³ = 2n³

Thank you in advance!

2007-02-09 06:09:27 · 2 answers · asked by MathStudent3 1 in Mathematics

I need to know. I want to cross referance.

2007-02-09 06:08:48 · 1 answers · asked by furball_boi 1 in Earth Sciences & Geology

2007-02-09 06:08:24 · 4 answers · asked by ali s 1 in Physics

11. The molecular mass of sodium oxide (Na2O) is


A. 22.98977.
B. 38.98917.
C. 45.97954.
D. 61.97894.

2007-02-09 06:07:54 · 7 answers · asked by tami c 1 in Chemistry

2007-02-09 06:07:48 · 4 answers · asked by Anonymous in Astronomy & Space

In "Back to the Future", the 1955 Doc freaks out when he finds out that he must generate 1.21 gigawatts to power his time machine. How much is 1.21 gigawatts? Like, how many regular light bulbs does that equal? Why is it unreasonable to find a source of this much energy in 1955 but not 1985?

2007-02-09 06:06:57 · 7 answers · asked by Anonymous in Other - Science

2007-02-09 06:06:30 · 4 answers · asked by SCOTLAND! 2 in Geography

Nitrogen is NOT a poisonous gas but even then animals die in the atmosphere of nitrogen. WHY?
Neither does it react to form poisonous substance nor does it cause any harm to organs.Then why do animals die in the atmosphere of Nitrogen?

2007-02-09 06:06:17 · 14 answers · asked by Abhineet 2 in Chemistry

2007-02-09 06:06:10 · 4 answers · asked by kristina c 1 in Mathematics

#1. Which cells are acid-fast and what part of the cell allows this distinction?

#2. How do we observe capsules?

2007-02-09 06:06:10 · 3 answers · asked by Anonymous in Biology

2007-02-09 06:01:48 · 7 answers · asked by brandontremain 3 in Mathematics

Have you ever arrived at the movie theater late and can't find a seat because of the darkness? Well I've thought of an idea of a Seat Sensor. There will be an electronic chart in the back of the theater which has the display of the seats in the theater. When you sit down on the seat, the sensor goes dark, but remaining seats that are not occupied will remain lit.

2007-02-09 05:59:38 · 6 answers · asked by Mr.Shaikhy 1 in Engineering

I am looking for either a cool one that slows them down, a warm one that speeds them up, or both. Right now I have some ideas, but I am looking for more insite. Are there even currents that really effect the hrricanes; or it it just the warm water by the equator, and the convection currents that creates? Thanks

2007-02-09 05:59:00 · 6 answers · asked by girl 1 in Earth Sciences & Geology

Explain it in an easy way.
The best answer will be used as my research for this experiment.

2007-02-09 05:57:48 · 4 answers · asked by ledzepgirl♥ 2 in Chemistry