Science & Mathematics - 20 August 2007

I'm working on a robotics project. I want to control the robot wireless through sending/recieving signals from/ to the robot using RF transmitter/reciever circuits. So I need some practical examples for these circuits in a range not less than 30 meters. If there is any other simple mean to control the robot wireless please mention it

2007-08-20 11:13:09 · 3 answers · asked by Amany O. 1 in Engineering

Hi i work in the risk assesment feild and was wondering what do you think would happen if two babies fought a death match. On one side the baby cant punch that hard but on the other side how much can the baby take. What do you guys think

2007-08-20 11:10:53 · 3 answers · asked by AlthePal 1 in Physics

The house we just rented has no grounded outlets, but rather two prong non-grounded outlets. We have expensive electronics to plug in, so we would like some kind of surge protection. Now we have come up with a couple of options, and I was hoping to run some by you. First of, would simply buying a two to three plug adapter work? I do not think it would really solve the problem since the ground plug is simply going into the center screw which is not connected to anything; therefore, the surge protector would have no way to divert the current away from the electronics. Am I wrong in this assumption? Secondly, how about a ground fault connection interruptor (gfci). They are designed to compare input and output currents and trip the circuit if there is a discrepancy. Would instaling one of these-- mind without a ground cable connceted at all-- and then plugging a surge protector into it provide the required protection for our electronics?

2007-08-20 11:10:26 · 1 answers · asked by budgemano 1 in Engineering

I've heard: egg, cone, and cylinder with done top. Which of these would be most resistant? And what would be a suitably strong material?

2007-08-20 11:08:33 · 13 answers · asked by Anonymous in Engineering

The first mechanical clock makers could have built clocks running counter-clock wise and we would have a reverted idea of the same concept. What is the technical or historical reason?

2007-08-20 11:02:29 · 6 answers · asked by Francis 2 in Engineering

What are all the prime numbers from 50-75 first one to answer right gets the points!

2007-08-20 11:02:06 · 3 answers · asked by Anonymous in Mathematics

the equation:

f(x)= (x^2 + x - 2) / (x^2 - x - 6)
to get the VA i set the denominator equal to zero...

x^2 - x - 6 = 0
(x -3) ( x +2) = 0
3, -2.
so there is a VA at 3 and a VA at -2. but when i graphed it on my calculator...the graph went through the VA. is this becasue there is a hole at -2?

2007-08-20 11:01:08 · 3 answers · asked by yeahxitsxsarah 2 in Mathematics

feed your family or donate your resources towards space exploration its your choice as an individual and on a broader range why starve the world with one hand and with the other throw money at space exploration

2007-08-20 10:58:38 · 12 answers · asked by samman 3 in Astronomy & Space

Im just curious

2007-08-20 10:51:40 · 5 answers · asked by Brittany n 1 in Botany

will you please name 2 science theories??
or even three

2007-08-20 10:51:31 · 6 answers · asked by Anonymous in Other - Science

A TANK WITH A FLAT BOTTOM IS FILLED WITH WATER TO A HEIGHT OF 4 METERS.
(You can ignore atmospheric pressure when calculating your answer.)

A.4.0kPa
B.9.8kPa
C.18.9kPa
D.39.2kPa

2007-08-20 10:44:29 · 4 answers · asked by JOHNNY J S 1 in Physics

2007-08-20 10:43:55 · 4 answers · asked by scubalizard.geo 1 in Physics

I would like to know when minnesotan reptiles amphibians birds and other egg laying creatures lay there eggs but cant find a good webpage HELP please

2007-08-20 10:39:07 · 3 answers · asked by Laura 2 in Zoology

2007-08-20 10:38:40 · 2 answers · asked by Bernie S 1 in Engineering

Mrs. Jones was 24 years old when Sally was born. In three years, the sum of their ages will be 68 years. How old is each now?

*Don't worry about solving the problem if you don't want to; I just don't know how to do it so I need an equation for it.

2007-08-20 10:35:38 · 6 answers · asked by Steph 1 in Mathematics

I was just wondering because i am writing a paper on the ethics of stem cell research, and in all the things i've read they say alot about theraputic cloning. I'm wondering for my own personal knowlege and to see if my title even makes sense. The title is: "To clone or not to clone: The ethics of stem cell research"

Thanks in advance.

2007-08-20 10:32:03 · 3 answers · asked by Jackie 3 in Biology

2007-08-20 10:31:55 · 6 answers · asked by CHANIQUA D 1 in Botany

2007-08-20 10:30:19 · 11 answers · asked by Anonymous in Paranormal Phenomena

Wheel’s Bicycle shop advertised a bicycle for 15% off for a savings of $36. The bicycle did not sell so it was offered at a new 20% discount off the sale price.

(1) What did the bicycle sell for regularly?
(2) What is the amount of the new discount?

2007-08-20 10:29:10 · 2 answers · asked by Chris 1 in Mathematics

2007-08-20 10:26:17 · 2 answers · asked by Beau B 1 in Mathematics

I would like an informative short answer

2007-08-20 10:24:24 · 19 answers · asked by incap 1 in Earth Sciences & Geology

12+4x=20

A.) Subtract 4x from both sides, then divide by 4.

B.) Subtract 12 from 20 then divide the answer by 4.

C.) Add 12 to 20 then multiply the answer by 4.

D.) Add 4x to both sides, then divide by 4.

2007-08-20 10:23:37 · 15 answers · asked by angel 1 in Mathematics

In Circle O, the midpoint of segment GH is point O. AB = 4x - 2 and CD = 2x + 12.

Part a) Find the value of x.
Part b) Find the value of AB and CD.
Part c) If GH = 32, find the length of the radius of the circle. Write your answer rounded to the nearest hundredth.
You must show all work for each part to receive full credit.

Picture included: http://img106.imageshack.us/img106/6045/math2ur5.jpg

2007-08-20 10:20:54 · 2 answers · asked by zerokun4 1 in Mathematics

My kid asked me what the opposite of zero is, does anyone know?
Like the opposite of +1 is a -1
but what can the opposite of 0 be? It's not a negative or a positive.

2007-08-20 10:20:31 · 8 answers · asked by Anonymous in Mathematics

I was really then taken to this planet around the central star of orions belt...they taught me things you wouldnt believe..
like photoplane that work on light beams,,like hologram tv's were you can interact with the people,,like holidays a million miles away in the blink of an eye...could i be dreaming or was it real...

2007-08-20 10:19:23 · 37 answers · asked by emc.squared 1 in Astronomy & Space

I would like to know other peoples opinion on this specific subject. do you have any weird story to tell, or believe they exist? there is one man that i think says the truth his name is Jaime Maussan you should see him, he can change your mind.
anyways , what do you think about this subject????

2007-08-20 10:17:47 · 11 answers · asked by Red-Green 3 in Astronomy & Space

2007-08-20 10:13:54 · 3 answers · asked by Alexander 6 in Physics

2007-08-20 10:13:40 · 10 answers · asked by lilou 1 in Mathematics

Perhaps from any of Nasa's missions

2007-08-20 10:13:40 · 3 answers · asked by Craig C 2 in Astronomy & Space

2007-08-20 10:10:56 · 8 answers · asked by Anonymous in Astronomy & Space