Science & Mathematics - 19 October 2006

2006-10-19 11:36:34 · 8 answers · asked by Curtis B 1 in Other - Science

A 35kg child sits on a uniform seesaw of negligible mass, 2.0m from the fulcrum/pivot point. Another child (30kg) must sit how far form the fulcrum for the seesaw to be in equlibrium?

2006-10-19 11:33:43 · 3 answers · asked by lubna h 1 in Physics

is there something with a speed higher than 300000 km/h ?

2006-10-19 11:33:37 · 11 answers · asked by cbuubc 1 in Mathematics

You have these elements to choose from:

Lithium
Francium
Beryllium
Calcium
Barium
Titanium
Tantalum
Chromium
Palladium
Platinum
Silver
Zinc
Boron
Carbon
Lead
Nitrogen
Arsenic
Iodine

2006-10-19 11:32:51 · 4 answers · asked by Anonymous in Chemistry

I have a report and poster due on deposition tomorrow, and I need to know absolutely everything anyone can tell me about it. Not just the definition, but past that. I already know that it's when sediments are deposited and stuff, but I need WAY more info in order to finish this report, and I can't find ANYTHING!!!! PLEASE HELP ME!!!!! Please be nice people and post something. I don't care if it's just a link or 100 pages posted here on deposition, HELP!

2006-10-19 11:32:46 · 2 answers · asked by lightupthesky9 1 in Earth Sciences & Geology

what are they?

2006-10-19 11:30:07 · 3 answers · asked by Anonymous in Chemistry

Infrared waves are supposed to be invisible to the unaided eye, but I've found various websites online that refer to "infrared light." I'm slightly confused.

2006-10-19 11:29:42 · 4 answers · asked by Lynn 1 in Physics

2006-10-19 11:29:17 · 3 answers · asked by pimp09 1 in Mathematics

true or false reproductive cells have only half as many chromosomes as the other cells in an organism

2006-10-19 11:28:21 · 5 answers · asked by sebas 2 in Earth Sciences & Geology

what country did the first human or animal cloning?

2006-10-19 11:27:33 · 14 answers · asked by marywise 1 in Other - Science

2006-10-19 11:25:51 · 5 answers · asked by sebas 2 in Earth Sciences & Geology

My teacher taught us that when
metal + non-metal = ionic bond
non-metal + non-metal = covalent bond

but then if according to electro-negativity, let say for Ca and H

i would contradicts between
metal (Ca) + H (non-metal) = ionic

but their difference in electro-negativity= 1.2 (lower than 1.6)
then THAT would be Covalent

Please explain

2006-10-19 11:25:17 · 6 answers · asked by Anonymous in Chemistry

Coroners estimate time of death using the rule of thumb that a body cools about 2 degrees Farenheit during the first hour after death and about 1 degrees Farenheit for each additional hour. Assuming an air temperature of 68 degrees F and a living body temperature of 98.6 degrees F, the temperature T(t) in F of a body at a time t hours since death is given by

T(t) = 68 + 30.6e^(-kt)

For what value of k will the body cool by 2 F in the first hour

2006-10-19 11:23:43 · 1 answers · asked by ? 1 in Mathematics

It seems to me that, within limits, a galaxy emits light through the entire visible spectrum (except where occur absorbtion bands). I would think that each color, in turn, would become invisible to us, but another wavelength would take it's place and the galaxy would have a normal appearance. In other words if something is emitting ultraviolet through infrared radiation is receding at the proper velocity ultraviolet would become violet, and orange would become red, and the others in between would "move one notch" so to speak, leaving the object looking normal to us. Wouldn't radio wavelengths eventually become visible if the velocity of recession was correct?

2006-10-19 11:23:32 · 9 answers · asked by David A 5 in Astronomy & Space

2006-10-19 11:22:42 · 8 answers · asked by DR.Z 1 in Chemistry

Any info learned that one of the kings in france before the french revolution had a bathtub made out of it, teacher said it was very expensive and that is all he knew. I would like to learn some info about it because it caught my attention. He said the tub was worth more than a single commoner would make in1000 YEARS.

2006-10-19 11:22:26 · 1 answers · asked by im4psu779 1 in Earth Sciences & Geology

On Monday, the following equation gave the exchange rate between the value of the Canadian dollar (C) and the U.S. dollar (U):

C=1.5U

On Tuesday, the exchange rate had changed to the following equation:

C=1.6U

On Monday, Bradely changed $40 U.S. to Canadian dollars at Monday's exchange rate. He did NOT spend any of the money, and on tuesday he changed it back to U.S. dollars at Tuesday's exchange rate. How much money (in U.S. dollars) did Bradley LOSE in this process?

2006-10-19 11:20:53 · 11 answers · asked by adrian43092 2 in Mathematics

2006-10-19 11:20:44 · 15 answers · asked by Charles F 1 in Engineering

2006-10-19 11:20:06 · 3 answers · asked by brandonek@sbcglobal.net 1 in Mathematics

2006-10-19 11:20:04 · 5 answers · asked by PaulCyp 7 in Biology

2006-10-19 11:18:31 · 7 answers · asked by Anonymous in Biology

I have to convert 58 nanoseconds into seconds.

2006-10-19 11:18:14 · 7 answers · asked by Tori H 1 in Physics

I keep finding mathematical formulas which include integration in them as a fundamental part. However i don't know what integration does, how it works or anything, could someone please explain the basics to me. Cheers

2006-10-19 11:17:23 · 10 answers · asked by Anonymous in Mathematics

What I need is something like a bicycle's brake lever on the handlebar. But instead of jumping back when you release it, it will stay at any position in between as I set with my hand even if it is under (spring ) pressure. Is there anything like this that exists?

2006-10-19 11:14:24 · 1 answers · asked by forby_mm 2 in Engineering

its all in the question, please all ideas are welcome

2006-10-19 11:11:15 · 1 answers · asked by chaosrules221 1 in Biology

A 7kg object hangs at one end of a rope that is attached to a support on a railroad boxcar. When the car acelerates to the right, the rope makes and angle of 37 degrees with the vertical. The acceleration of gravity is 9.8 m/s2. Find the acceleration of the car.

2006-10-19 11:10:40 · 1 answers · asked by Anonymous in Physics

I need to know how to write this in set-builder notation. The 3 A's are making it difficult and I do not know what they are for.

2006-10-19 11:02:43 · 1 answers · asked by Karen F 1 in Mathematics

2006-10-19 11:02:22 · 23 answers · asked by qrund 3 in Astronomy & Space

Specifically, hwo many sets of three can be made from a group of 26? What is the formula used to find this out?

2006-10-19 10:59:03 · 5 answers · asked by TALCC_CO 1 in Mathematics

Describing slope plot the points and draw a line through them. Without calculating, state whether the slope of the line is positive, negativ, zero or undefined, explain your resoning

2006-10-19 10:57:39 · 6 answers · asked by Anonymous in Mathematics