Science & Mathematics - 18 November 2007

My Chemistry teacher told me once. Something to do with H2O in the air when it rains.. suppose to make it warmer.. but i forgot the whole explanation.
Does anyone know?

2007-11-18 12:09:19 · 7 answers · asked by MJoneSsssssss 1 in Chemistry

Answers please

log (12) 3
log (12) 6
log (12) 8

2007-11-18 12:08:45 · 4 answers · asked by Anonymous in Mathematics

Can you show how to do it please

2007-11-18 12:08:35 · 2 answers · asked by Anonymous in Chemistry

Does it give warning before it erupts?
What type of lava, bombs, pyroclastic flows, lahars does kohala erupt?

2007-11-18 12:06:58 · 2 answers · asked by Anonymous in Other - Science

How do fish evolve into man made canal and lakes? Are they put in there by man himself or do they grow from bacteria?

2007-11-18 12:05:45 · 22 answers · asked by Anonymous in Zoology

A small company produces both doll houses and sets of doll furniture. The doll houses take 3 hours of labor to produce, and the furniture sets take 8 hours. The labor available is limited to 400 hours per week, and the total production capacity is 100 items per week. Existing orders require that at least 20 doll houses and 10 sets of furniture be produced per week. Write a system of inequalities representing this situation, where x is the number of doll houses and y is the number of furniture sets.

2007-11-18 12:04:53 · 1 answers · asked by Tonie M 1 in Mathematics

An astronaut in a rocket moving at 0.4c toward the Sun finds himself halfway between Earth and the Sun. According to the astronaut, how far is he from Earth? In the frame of the Sun, the distance from Earth to the Sun is 1.5 1011 m.

2007-11-18 12:03:04 · 1 answers · asked by Anonymous in Physics

A total of 600 tickets were sold for a concert. Twice as many tickets were sold in advance than were sold at the door. If the tickets sold in advance cost $25 each and the tickets sold at the door cost $32 each, how much money was collected for the concert?

and

The owner of a movie theater was counting the money from one day's ticket sales. He knew that a total of 150 tickets were sold. Adult tickets cost $7.50 each and children's tickets cost $4.75 each. If the total receipts for the day were $891.25, how many of each kind of ticket were sold?

?? adult tickets and ?? children's tickets were sold.

2007-11-18 12:01:44 · 4 answers · asked by Emilyy 4 in Mathematics

I have my science fair project wher i will eb in a room wtih ultraviolet type b lights. How should i dress in order to not get sick or get cancer?

2007-11-18 11:59:25 · 4 answers · asked by HOLA 2 in Other - Science

2007-11-18 11:58:41 · 8 answers · asked by malibudream06 3 in Weather

If a man buys a horse for $20 and then sells it for $30. He then buys the same horse for $40 and then sells it for $50. How much money does he have left?

2007-11-18 11:52:49 · 38 answers · asked by Sarah T 3 in Mathematics

Boyles, Charles, Ideal Gas Law, Avagrado's Law, Combined Gas Law

When I read an equation, I am having trouble deciding which law to use to solve the equation. Any suggestions?

2007-11-18 11:50:51 · 2 answers · asked by Emerson 5 in Chemistry

Use that 5 Words (Mars,Mercury,Earth,Venus,Asteroids) to Match the Question!
1.___Has an atmosphere very similar in composition to Mars.
2.___The most heavily cratered planet.
3.___Has the highest level of oxygen in its atmosphere.
4.___ Surface temperatures are very high due to the greenhouse effect.
5.___Has clouds made of sulfuric acid.
6.___Has a volcano as large as Michigan\'s lower peninsula.

2007-11-18 11:50:08 · 6 answers · asked by Yolove 1 in Astronomy & Space

To be more specific I would like to see pictures of large steel beams similar to those used to contruct the world trade center buildings 1 and 2 so that I can compare the effect it has on the steel to that of the photos of steel people are talking about in a photo of Ground Zero that were cut at a 45 degree angle, and have slag on the outside of the beam. Welders tell me it should be on the side you are cutting through, not the side you are starting on. The photo I have questions about is here:

http://abovetopsecret.com/forum/thread315919/pg1

Please if you have professional knowledge of demolition, welding, or steel working, respond with your expertise.

Besides the video/pics I am looking for, Here are my questions:

Why would clean-up crews cut remaining beams at a 45 degree angle?

What does a purposely demolished steel beam look like after being cut with thermite/thermate?

Steel weakens at about half its melt temp, what if it is load bearing, any formulas?

Thanks

2007-11-18 11:48:43 · 3 answers · asked by thatblissguy 1 in Engineering

What must the separation be between a 6.2 kg particle and a 1.1 kg particle in order for their gravitational attraction to be 2.7*10^-12 N?

if you set the problem up, i should be able to finsih it and get the answer.

thank you so much!!!

2007-11-18 11:48:22 · 1 answers · asked by Elizabeth 3 in Physics

I just read about it and watched some videos and now i'm shaking and feel like i'm gonna throw up!
People are building bunkers and stuff!

What is supposedly supposed to happen?
Its supposeed to line stuff up in the solar syatem or something right? And then what?
Do you believe it will happen?
Why or why not?

Please make me feel better i'm really scared!!!!

2007-11-18 11:46:40 · 17 answers · asked by ♥Tami 3 in Astronomy & Space

...in the gulf of mexico? and another question, whats the river that drains the central plains of the u.s and flows into the gulf of mexico?

2007-11-18 11:43:38 · 7 answers · asked by Anonymous in Geography

2007-11-18 11:43:31 · 1 answers · asked by Brat 1 in Chemistry

Elastic potential energy is the potential energy in an object because it has been stretched or compressed. I'm pretty sure the answer is no but I haven't been able to find anything to back me up on the internet. Help me out plz!

2007-11-18 11:43:28 · 2 answers · asked by Anonymous in Physics

soil plough !

2007-11-18 11:42:48 · 1 answers · asked by Omid 1 in Engineering

Current research on humans senses shows that

a. there are more than five senses
b. there are actually six senses; the sixth has been established as extrasensory perception, or ESP
c. there are five senses, just as Aristotle suspected
d. balance, position, and movement of one's body are not considered to provide sensory information of any
value

2007-11-18 11:41:38 · 2 answers · asked by Anonymous in Other - Science

Assume that the readings of inexpensive thermometers for the temperature of the freezing point of water are normally distributed, and have a mean of 0 degree C and a standard deviation of 1 degree C. Find the indicated probability where z is a reading in degrees Celsius. P(-1.80 < Z < 1.80)

2007-11-18 11:40:50 · 1 answers · asked by austin 1 in Chemistry

2007-11-18 11:40:30 · 3 answers · asked by Anonymous in Physics

Hello -

I have seem to forgotten how to do some fairly simple trig integrals.

Does anyone know how to do to the following integral?

Integral (cos^2(t)sin(t))dt

I know the answer is - (cos^3(t))/3, but I am no sure how to get it.

Please help....thanks.

2007-11-18 11:40:15 · 3 answers · asked by Anonymous in Mathematics

If you know the answer please send me an e-mail @ poe.daniel@gmail.com
I need this to be answered before the 20th of November!

2007-11-18 11:40:01 · 0 answers · asked by Joe 1 in Biology

2007-11-18 11:37:55 · 3 answers · asked by Anonymous in Geography

A 4.40 g piece of solid CO2 (dry ice) is allowed to vaporize (change to O2 (g)) in a balloon. The final volume of the balloon is 1.00 L at 300 K. What is the pressure of the gas?

1) 0.122 atm
2) 122 atm
3) none of these
4) 2.46 atm
5) 246 atm

2007-11-18 11:36:27 · 3 answers · asked by Anonymous123 1 in Chemistry

I'm doing a project for Health class about overdoses, and was wondering what would happen to a person if they took a whole bottle of tylenol? Like organ failure, death?

2007-11-18 11:35:59 · 12 answers · asked by VolleyballAddict07 2 in Medicine

limit of: log base 5 (8x - x^4) as x approaches 2 from the left side

2007-11-18 11:35:46 · 2 answers · asked by Britt R 1 in Mathematics

an object of mass m is moving with speed v0 to the right on a horizontal frictionless surface. it explodes into two peices.

one piece with mass (20/23)m moves to the left at velocity v0/5. second piece with mass (3/23)m moves to the right at what velocity?

2007-11-18 11:34:42 · 1 answers · asked by Joanna H 1 in Physics