Science & Mathematics - 31 October 2007

2007-10-31 12:12:44 · 2 answers · asked by rn 1 in Zoology

2007-10-31 12:11:52 · 1 answers · asked by Dalila 1 in Mathematics

2007-10-31 12:11:11 · 5 answers · asked by mary 1 in Biology

2007-10-31 12:09:31 · 2 answers · asked by David S 1 in Earth Sciences & Geology

I do NOT need answers, I need you to provide me with a better understanding of the process to get to the answers. If possible can you provide keywords in the question that lead to why you did what you did. Please do not skip steps or use calculator functions. All I will have available to me is a basic calculator and a table with Z Scores, please check for the rest of my questions:

A recent survey was conducted to compare the cost of solar energy to the cost of gas or electric energy. Results
of the survey revealed that the distribution of the amount of the monthly utility bill of a 3-bedroom house
using gas or electric energy had a mean of $126 and a standard deviation of $14. If nothing is known about the
shape of the distribution, what percentage of homes will have a monthly utility bill of less than $98?

The answer is at most 25% please explain as, best you can, the mental thinking and steps toward getting there.

2007-10-31 12:06:41 · 1 answers · asked by Anonymous in Mathematics

I need to know some Natural resources and Places of Interest of Coniferous/ Boreal Forests (Taiga).

If you know something please tell me.

also if you know of a website containing information on Taiga and it's natural resources that would be very helpful, Thanks =]

2007-10-31 12:04:09 · 1 answers · asked by Mrs.Frank Sinatra 3 in Earth Sciences & Geology

What is the area of a triangle with base 11 cm and height 21 cm?





Enter a decimal.
_________cm2





How would you get a decimal out of that? O.o

2007-10-31 12:03:46 · 5 answers · asked by Anonymous in Mathematics

2007-10-31 12:03:18 · 5 answers · asked by Anonymous in Biology

2007-10-31 12:03:02 · 2 answers · asked by dz 1 in Chemistry

The Zunino family weighed their 5 pumpkins 3 at a time. The following weights were recorded: 3006, 3035, 3093, 3122, 3151, 3180, 3209, 3238, 3267, 3325. Find the weight of each pumpkin.

Please help me write the equations to solve this problem. Thanks!

2007-10-31 12:01:03 · 3 answers · asked by ThistleThorn 2 in Mathematics

well the question goes like this :Calculate the pH of an ammonia solution made by diluting 25.0 mL of 0.204 M NH3 to a total volume of 50.0 mL.
a.) 2.87 b.) 8.26 c.) 9.25 d.) 11.13 e.) 11.78

The way i approach this question is as follows i have the intial mole sand volume so M1V1=M2V2 ...
so 25*.204= 5.1
then 5.1/50= .102
then i take the molar mass of ammonia which is 17 and i divide the .102/17=.006
then i do -log (.006) =2.22
so then i do 14-2.22= 11.78 which is one of the answers if anybody can confirm or deny, any additional help is appreciated

2007-10-31 11:59:24 · 2 answers · asked by Fredrick J 2 in Chemistry

(a) in the oviduct
(b) in the ovary
(c) in the uterus
(d) in the vagina

2007-10-31 11:59:01 · 9 answers · asked by Anonymous in Biology

(a) the beating of the cilia in the oviduct
(b) the beating of the flagella in the oviduct
(c) the beating of the egg?s cilia
(d) the beating of the egg?s flagella

2007-10-31 11:57:40 · 3 answers · asked by Anonymous in Biology

A comet with an elliptical orbit with one focus at the sun. The maximum distance to the Sun (aphelion distance) is rA = 5 x 10^9 km. The minimum distance (perihelion distance) is rP = 5 x 10^7 km. Find the speed of the comet at the perihelion position.

2007-10-31 11:53:30 · 2 answers · asked by Jake J 2 in Astronomy & Space

2007-10-31 11:51:46 · 5 answers · asked by Deenie 6 in Paranormal Phenomena

2007-10-31 11:50:32 · 4 answers · asked by Francesca C 3 in Engineering

(1) It contains the sperm?s nucleus and is the part of the sperm that enters the egg during fertilization
(2) In contains the sperm?s mitochondria
(3) It fuses with the plasma membrane of the egg cell
(4) It contains enzymes that are released when the sperm encounters an egg and dissolves a hole in the matrix that surrounds the egg

2007-10-31 11:50:31 · 5 answers · asked by tnawee 1 in Biology

Everytime a piece is added, it seems like its American..
with the acception of the arm from canada, and a module from japan..

why are we wasting our time pushing other nations space programs furthur?
we need to start colonizing the moon now...

2007-10-31 11:49:46 · 6 answers · asked by SwiftKill 4 in Astronomy & Space

2007-10-31 11:49:40 · 6 answers · asked by Anonymous in Geography

(1) have the gonads of one sex but the external appearance of the other
(2) possess both male and female reproductive systems
(3) develop from unfertilized eggs
(4) usually fertilize themselves

2007-10-31 11:48:52 · 5 answers · asked by tnawee 1 in Biology

beds such that plant roots are found at the bottom, and chalk and iron at the beginning of the woolwich and reading beds?

2007-10-31 11:47:54 · 1 answers · asked by Anonymous in Earth Sciences & Geology

For instance, cloning can lead to the death of the person being experimented is a point. I need like 1 or more points regarding this subject and it needs to be on the No to cloning side b/c i got lots of positive things about cloning? Hope I can be helped :)
PS: Please do NOT make it tooo scientific b/c im only in Junior High school lvl so yea....

2007-10-31 11:47:40 · 5 answers · asked by shaneluchun 2 in Biology

Answers Always, Sometimes, Never
Thank you

2007-10-31 11:45:10 · 8 answers · asked by Anonymous in Mathematics

I have heard that the sun is apparently expanding and will eventually burn all life on earth. In that context, should govts seek to colonise and find other planets that can support human life?

2007-10-31 11:43:46 · 11 answers · asked by Paranormal I 3 in Astronomy & Space

science question
please answer it scientifictly

2007-10-31 11:43:20 · 4 answers · asked by blueberry,channel,all my faves! 2 in Chemistry

2007-10-31 11:43:20 · 3 answers · asked by Kat 1 in Mathematics

There are 14.7 pounds of pressure weighing down on us Why are we not crushed by the weight of the atmosphere ?

2007-10-31 11:43:15 · 3 answers · asked by liltchaser 2 in Physics

2w^2 + 8w +5 =0 none of these terms divide and I can't find a common factor

2007-10-31 11:41:29 · 4 answers · asked by Anonymous in Mathematics

The boiling point of water is 100 °C (212 °F) at standard pressure. I have always assumed that this is the hottest water can get before evaporating, but my buddy says that it is possible to get water hotter than that (in a microwave, for instance).

Is this true? If so, why?

2007-10-31 11:40:12 · 8 answers · asked by jason 1 in Other - Science

is it something you are born with or can it be trained? if it's trainable how can you practice it? sewing? piano? what are your thoughts?

2007-10-31 11:38:38 · 8 answers · asked by 킹세븐 2 in Medicine