Science & Mathematics - 30 September 2007

2007-09-30 12:52:56 · 1 answers · asked by Anonymous in Chemistry

A 7 1/4 inch circular power saw rotates at 5200 revolutions per minute.

Find the linear speed (in feet per minute) of one of the 24 cutting teeth as they contact the wood being cut.

2007-09-30 12:51:21 · 3 answers · asked by dani010191 3 in Mathematics

What's the difference? Is steel usually forged and tempered at the same time? When would you want to use forged steel instead of tempered steel?

2007-09-30 12:50:09 · 1 answers · asked by John 1 in Physics

I like Star Trek. It is very entertaining. But I just do not think what they show on Star Trek, will be possible. Captain Kirk is 200 years in the future. I just don't THINK we will develop technology THAT MUCH in less than 200 years. I mean, they show us time traveling in 900 years. At that rate, what else will we be able to do when we reach 1,000 years ahead, etc.? Been there, done that - everything!!

And the Enterprise. I am guessing that they will more likely build robots to fly everywhere. I mean, when a robot crashes, who cares? Crash a ship like the Enterprise, people would go nuts!! Robots are just cheaper and safer.

What do you think?

2007-09-30 12:48:12 · 10 answers · asked by Anonymous in Astronomy & Space

I built 6 robots as slaves for my factory. They can leave if they can figure out their eye color. 4 have green eyes and 2 have red eyes. They were not built to communicate with each other in any shape or form.

First day, before work, I tell them:
1. they are all identical, with the same software for clear logical thinking and reasoning abilities.
2. they think identically.
3. only difference is I built them using different eye colors.
4. they can't see their own faces/eyes anywhere but they can see each other.
5. they must meet each evening after work to see if anyone can figure out their own eye color.
6. if a robot knows its eye color then it must go to its room, pack, and leave at midnight: it is free from slavery.
7. if a robot does not know its eye color then it must go to its room, sleep the night, work another day, and then come to the evening meeting.

Explain exactly what happens.

2007-09-30 12:45:51 · 3 answers · asked by realme 5 in Other - Science

Block of mass 3.8 kg is pushed on frictionless suface 4.6 m. By contant force of 16 N, 20 degrees below the horz.
Whats the work done by the normal force and force of gravity?

2007-09-30 12:43:51 · 1 answers · asked by ひいらぎ 5 in Physics

just wanted to know if your that smart like me.
Heres number 2.(They are true and false too.)
2. The sun contains 99 percent of the mass in the solar system.
I'm just bored but can YOU answer them.

2007-09-30 12:41:59 · 5 answers · asked by Anonymous in Medicine

2007-09-30 12:41:52 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-30 12:40:11 · 11 answers · asked by flannelpajamas1 4 in Zoology

i need an idea that follows these standards- i must find 3 different sources for it, no living things, imust be able tomake a question out of it, and i must be able to follow the scienitific method.

I had a few ideas-
-what is the water quality of rainwater in diff. areas?
-how does a camera work?

could u tell me any other ideas or help me to do my ideas using the schools standards (Above)

thanks =)

2007-09-30 12:39:35 · 3 answers · asked by Jumper ♥ 4 in Other - Science

2007-09-30 12:39:28 · 3 answers · asked by Anonymous in Weather

how do u do adding and subtracing unlike frations...............i don't understand plz lke 5/8+(-3/4)

2007-09-30 12:36:22 · 7 answers · asked by Evelyn S 2 in Mathematics

2007-09-30 12:34:43 · 5 answers · asked by flannelpajamas1 4 in Zoology

I am taking a test in a few days and would like to know the formulas for determining Voltage, Ohms,Wattage and Amperage. I need these to figure out things like finding the resistance in a circuit and how much voltage there is, etc. Any help would be appreciated

2007-09-30 12:31:54 · 10 answers · asked by Anonymous in Engineering

A The slow motion of the Earth's rotation axis on the celestial sphere.
B The accuracy with which numbers are given in astronomy.
C The seasonal north-south motion of the Sun on the celestial sphere.
D The apparent backward motion of the planets on the celestial sphere.
E The daily eastward motion of the Sun around the celestial sphere.

2007-09-30 12:26:39 · 3 answers · asked by fundamentalz27 1 in Astronomy & Space

I know it used to be very popular in baking, but is there any other special usage for them?

2007-09-30 12:26:36 · 4 answers · asked by Pika C 1 in Medicine

Find two positive real numbers that difffer by 1 and have a product of 1

2007-09-30 12:25:13 · 2 answers · asked by plplz 1 in Mathematics

find real or imaginary solutions:

x^-2 - 9x^-1 +18 = 0

2007-09-30 12:19:28 · 1 answers · asked by plplz 1 in Mathematics

My friend needs help on this.
18=c+5
-----
2
Thanks to anyone who helps! And can you show the steps?

2007-09-30 12:15:56 · 6 answers · asked by Marianna 2 in Mathematics

isnt that weird?

2007-09-30 12:15:52 · 9 answers · asked by fWHattt!! 2 in Other - Science

A streetcar is freely coasting (no friction) around a large circular track. It is then switched to a small circular track. When coasting on the smaller circle its speed is:

a) greater
b) less
c) unchanged

2007-09-30 12:14:36 · 2 answers · asked by ? 6 in Physics

2007-09-30 12:07:47 · 1 answers · asked by Anonymous in Chemistry

Sometimes I hear a muffled noise that sounds like a radio that is to far away to make out what is being said. Not music , but the sound of voices having a conversation, that you can't quite make out. I don't know how else to describe it. I hear it at different times when the house is quiet. Could this just be radio waves floating around and I am just right there to hear them?

2007-09-30 12:01:56 · 16 answers · asked by Leepal 5 in Paranormal Phenomena

49x^2 + 9 = 42x

&

6x = 19x + 25 / x+1 <--(fraction)

2007-09-30 11:53:14 · 1 answers · asked by plplz 1 in Mathematics

If so, plz do tell because I'd like to be able to see live pics.
I have Google Earth but apprently those pics aren't updated nor live so if there's anything else different/better I'd like to know! =]

2007-09-30 11:50:32 · 2 answers · asked by ♥ 4 in Astronomy & Space

http://ufopensacola.blogspot.com

2007-09-30 11:46:09 · 31 answers · asked by learning_x 3 in Paranormal Phenomena

http://img504.imageshack.us/img504/1048/mathbq1.jpg

The answer is 2x + 3y.
How do I arrive at the answer?
A step by step solution will be appreciated.

2007-09-30 11:43:19 · 3 answers · asked by david 2 in Mathematics

Help!!!!!! I have to come up with a chemistry project topic but I can't think of anything not too dangerous or not off-topic! I need an A+ idea ASAP. My hypothesis, outline, etc. are due by tomorrow but I need your ideas now! Please help in anyway you can! It's STRICTLY chemistry! And I have to be finish my outline in 3 hours from now! Thanks!

2007-09-30 11:41:31 · 2 answers · asked by AmyRose 3 in Chemistry

2007-09-30 11:37:58 · 11 answers · asked by Ace 2 in Astronomy & Space

I need to be able to find the difference between an Ionic compound, a molecular (or covalent) compound, and an acid given only the chemical formula (no charges or roman numerals)?

2007-09-30 11:35:06 · 7 answers · asked by Anonymous in Chemistry