Science & Mathematics - 19 October 2006

You see it in films, but does it work? Is it possible to sit on a river bed and hide from the baddies with a tube and breathe air? Is there a depth when this is impossible?

2006-10-19 12:25:18 · 8 answers · asked by JohnnyH 1 in Physics

2006-10-19 12:25:07 · 10 answers · asked by Kelly O 1 in Mathematics

Water is an example of..
a.an element
b.a homogeneous mixture
c.a compound
d.a hetrogenous mixture

2006-10-19 12:23:06 · 4 answers · asked by Anonymous in Other - Science

2006-10-19 12:19:33 · 16 answers · asked by Anonymous in Astronomy & Space

the z is the negative one exponet 's base. The ten squared is outside the parenthesis.

2006-10-19 12:19:15 · 3 answers · asked by Tori H 1 in Mathematics

I need to know what matrices are used for. how they are used in everyday things... Besides Math. I don't need to know how to solve them or anything (i know how to do that) just how they are used.

2006-10-19 12:17:11 · 12 answers · asked by K8E! 1 in Mathematics

2006-10-19 12:13:59 · 10 answers · asked by Tori H 1 in Mathematics

why? what?

2006-10-19 12:08:04 · 25 answers · asked by Anonymous in Earth Sciences & Geology

What are the six signs of life? first person to answer correctly(to my satisfaction) will get best answer. Thanks for the help

2006-10-19 12:07:40 · 4 answers · asked by Kevin M 2 in Other - Science

On the normal curve find the area
1)between -.23 and 2.23
2)to the left of -.75
3)to the right of -1.34

2006-10-19 12:05:37 · 2 answers · asked by Tara J 1 in Mathematics

if X & Y are independent, show that X and Y-complement are independent.

2006-10-19 12:04:43 · 2 answers · asked by jackal_04 1 in Mathematics

and 4 diseases caused by viruses?

2006-10-19 12:01:49 · 7 answers · asked by Anonymous in Biology

I am doing a project on the effect of centrifugal force on plant growth. I need a formula to calculate the amount of force on the plant. Does anyone have any???

2006-10-19 12:01:34 · 3 answers · asked by CanBo 1 in Physics

How do I find the area of a triangle? Base times height right? well my problem only gives the base, it doesnt give the height. How do I fugre out what the height is?

2006-10-19 12:01:33 · 9 answers · asked by Niksterrrr 2 in Mathematics

I need a site that tells the following:
History on tar spot
Damage
Cause
Host
Sources
Symptoms
Description
Disease Cycle
And anything else helpful you can find! I would like this answered ASAP!!!!! If you want you can write out the web link or the information... your choice. Thank you!!!!

2006-10-19 12:00:55 · 1 answers · asked by moezone1994 2 in Biology

A cone shaped cofee filter of radius 6cm and depth 10 cm contains water, which drips out through a hole at the bottom at a constant rate of 1.5cm cubic per secind.
a. if the filter starts out full how long does it take to empty?
b. find the volume of water in the filterwhen the depth of the water
is h cm.
c. how fast is the water level falling when the depth is 8 cm?
c.

2006-10-19 11:59:39 · 2 answers · asked by ? 1 in Mathematics

2006-10-19 11:59:23 · 6 answers · asked by Need Help 2 in Chemistry

The question is howmuch energy is absrobed or released when "melting 55.8 g of water at its metling point"

I got Q=18 600 J; I'm a little confused as to did I really understand the question, is the answer correct?

2006-10-19 11:58:14 · 3 answers · asked by mbtafan 3 in Chemistry

the ability to dissolve in water and to conduct electricity are examples of
a. physical properties
b.chemical changes
c.chemical properties
d.chemical bonding

2006-10-19 11:54:44 · 4 answers · asked by Anonymous in Other - Science

2006-10-19 11:54:00 · 8 answers · asked by Angelika 2 in Biology

In recent years the world's population has increased at a rate of approximately 10,900 people per hour. This number is equal to how many people per second? Round your answer to the nearest whole number.

2006-10-19 11:52:54 · 6 answers · asked by adrian43092 2 in Mathematics

2006-10-19 11:52:00 · 5 answers · asked by Anonymous in Physics

HOW EFFECTIVE ARE ROCK JETTIES?
How effective are wood piles?
Are our old Christmas trees slowing down the reosion?

2006-10-19 11:48:25 · 4 answers · asked by tricia m 1 in Earth Sciences & Geology

Where can I find information about how many trees there are in the world? What are the populations of various types of trees? Which country has the most trees? (Possibly Brazil or Russia?) Which state in the U.S. has the most trees? (Probably Alaska?) Which countries have more trees than people, and vice versa? Thank you for any assistance you might give me in finding answers to these and similar questions.

2006-10-19 11:46:55 · 2 answers · asked by wild_turkey_willie 5 in Botany

2006-10-19 11:44:20 · 8 answers · asked by Albie One 1 in Zoology

2006-10-19 11:41:53 · 12 answers · asked by Anonymous in Other - Science

looking for something more than a kit or a plain boat design...got any ideas for speed/efficiency/stability? I'm contemplating building a lake boat...20 footer...sail or powered...and I'd like it to have a major cool function in hull shape.

2006-10-19 11:40:39 · 3 answers · asked by Ford Prefect 7 in Engineering

A person opens a door by applying a 15N force to the door at a distance .90m from the hinges. The door opens 120 degree in 2.0s. How much work was done?

2006-10-19 11:38:47 · 2 answers · asked by lubna h 1 in Physics

Im stuck on a story problem please help

Diana purcahsed a house for $126026 She wants to sell it for a profit of exactly 12% However, she does not want to sell it herself. She wants a Real Estate Agent to sell it for her. The agent must make a commision of exactly 5.9% (in addition to Ann's 12% profit). How much must the agent sell the house for? Answer to the nearest dollar.

2006-10-19 11:37:27 · 4 answers · asked by n4rumi 2 in Mathematics

A constant torque of 10m-N is applied to a 10kg uniform disk of radius .20m. What is the angular speed of the disk after it rotates 2.0 revolutions from rest?

2006-10-19 11:36:34 · 2 answers · asked by lubna h 1 in Physics