Science & Mathematics - 2 December 2007

what came first the chicken or the egg?


is there more boys or girls in the world?

2007-12-02 14:10:12 · 3 answers · asked by angie babe 2 in Zoology

A winch at the top of 12 meter high building pulls a pipe of the same length to a vertical position. The winch pulls in rope at a rate of -0.2 meters per second. Find the rate of the vertical change and the rate of the horizontal change at the end of the pipe when y=6.

if anyone could even tell me where to start that would be very helpful. i've been trying to figure this problem out for a while now. thanks in advance.

2007-12-02 14:06:20 · 1 answers · asked by live in the moment 2 in Mathematics

2007-12-02 14:04:34 · 9 answers · asked by Anonymous in Astronomy & Space

2007-12-02 14:01:28 · 5 answers · asked by John F 1 in Mathematics

2007-12-02 14:00:12 · 7 answers · asked by Anonymous in Zoology

1/2x+2/3=1/8x-3/2

i know i should be able to know this, but i completely forgot about it because he randomly put a really old problem from something we're not even doing on the test review. thanks!

2007-12-02 13:59:17 · 2 answers · asked by k4y14hhh 2 in Mathematics

2007-12-02 13:58:31 · 4 answers · asked by Richard P 1 in Engineering

2007-12-02 13:55:00 · 2 answers · asked by cutepinkninja<3 1 in Geography

Suppose a is a constant between 0 and 1
Let R be the region between y=ax-x^2 and the x-axis from x=0 to x=1.

a) What is the volume of the solid obtained by rotating R about the x-axis?

b) What value of a creates the solid with the smallest volume?

2007-12-02 13:54:36 · 2 answers · asked by Anonymous in Mathematics

why would cold as opposite to warm water used t wash aspirin that is done in the experiment/lab?

can someone please help answer this question?
thankyou.

2007-12-02 13:54:33 · 3 answers · asked by abc 1 in Chemistry

2007-12-02 13:52:54 · 5 answers · asked by Anonymous in Mathematics

this is mole to moles
equation balanced
N2+3H2-->2NH3
if 4.0 mole of H2 rect how many moles of NH3 will be produced??
i got about 2.6mole of NH3
did i do it right please helpppp

2007-12-02 13:52:20 · 2 answers · asked by $$$$$ 2 in Chemistry

2007-12-02 13:51:51 · 1 answers · asked by Anonymous in Mathematics

im not sure how to figure these out can anybody help??

HClO2
HBr
HCn
sulfurous acid
hydroiodic acid
perchloric acid
phosphoric acid
hydrocloric acid
nitric acid
chlorous acid
hydrobromic acid
hypochlorous acid

if you could tell me how you got these or a method that would really help because finals are coming up soon and its 18% of my grade so please help!!!

2007-12-02 13:50:57 · 3 answers · asked by kukinney26 2 in Chemistry

How bad is it going to be? [Snow storm obviously.] Is it enough to have a snow day or have no work?

2007-12-02 13:50:55 · 3 answers · asked by Amber 2 in Weather

2007-12-02 13:50:14 · 11 answers · asked by Anonymous in Mathematics

10.0
-10.0
4.0
1.0 x 10-10
-4.0

2007-12-02 13:49:54 · 2 answers · asked by sonia 1 in Chemistry

Find the slope of the line passing theough the given points



1. (1,2) (6,7) 2. (-2,0) 2,5)


Formula:

Substitute:

Solve:



-----solve for both same way------

2007-12-02 13:49:53 · 3 answers · asked by Anonymous in Mathematics

Okay, so here's the problem. There's this guy (say James) who paid $15 to manufacture for a shoe. When he receives the pair of shoes, he has it marked to be sold at $21. So this customer (say Bob) comes with a counterfeit money of $50. Not knowing the the $50 is counterfeit James goes to his next door shop neighbor (say Mark) to get some change he James basically exchanges his counterfeit $50 for real $50. The James gives his customer Bob his change and the shoes. Later, the next day, Mark comes back to James to ask for a real $50 back when he (Mark) realized that the money was fake. How much money did James lose?

I think the answer is $94 but I also got a whole lot of other answers so I don't know. Please give your answer and an explanation.

Much thanks ^^

2007-12-02 13:48:19 · 5 answers · asked by Hideaki Takizawa 4 in Mathematics

what particular equipments can we use to measure the salt content of water in a fishpond?

2007-12-02 13:47:38 · 2 answers · asked by Anonymous in Chemistry

2007-12-02 13:44:25 · 4 answers · asked by liv 2 in Chemistry

i am doing a science project and i's due tomorrow i need anwsers now or i'm screwed

2007-12-02 13:43:50 · 2 answers · asked by ayana 1 in Biology

2007-12-02 13:41:04 · 2 answers · asked by Michael Barnes 1 in Chemistry

Im trying to figure out how to solve these problems

1) 2log(6) 4-1/3 log(6) 8=log(6)x

2) 2.3^(x^2)=66.6

3) e^2x-5e^x+6=0

4) ln 19.8 = ln e^0.083x

This on is tough
5) 4^x + 6(4^x)=5

The powere rule, quotient and product rules were what we were suposed to use.

Any help is much appriciated
Im just trying to figure out how to crack these step by step

2007-12-02 13:40:37 · 2 answers · asked by Anonymous in Mathematics

I'm going to try to explain the figure to the best of my ability. Side AB of the triangle is 18. Side BC is x. Side AC is 8. The angle coming from angle C is 130 degrees.

2007-12-02 13:39:57 · 1 answers · asked by aha51806 2 in Mathematics

One number is 3 times another number. The sum of the smaller number and twice the larger number is 77. Write a system of equations that you could use to find the smaller number.

2007-12-02 13:39:20 · 7 answers · asked by Bad N 1 in Mathematics

On Answers I saw a couple answers refer to www.cleanmotorpower.com. This looks like a new power source. Would something that uses no fuel and no pollution, would that be ion or atomic? Has anyone else seen the website and what do you think of it?

2007-12-02 13:37:49 · 3 answers · asked by Anonymous in Physics

2007-12-02 13:36:59 · 8 answers · asked by Anonymous in Astronomy & Space

2007-12-02 13:35:08 · 9 answers · asked by Corey 1 in Mathematics

3. Sexual selection may lead to

a. sexual dimorphism
b. disruptive selection
c. general similarities between males and females of the species.
d. speciation.
e. none of the above

2007-12-02 13:34:26 · 1 answers · asked by Anonymous in Biology