Science & Mathematics - 17 October 2006

A family member's brand-new house has the phrase, "Made with Post-Tensioned Concrete, Do NOT Drill!," stamped into the Garage floor in several places.

I saw a Discovery Channel show about Bridges built with the cables "Post-Tensioned," but how would this be done in a Garage Slab?

That is, can someone give me a summary of how, and why, a Garage slab would be build this way?

2006-10-17 06:00:38 · 3 answers · asked by entropy 3 in Engineering

2006-10-17 05:57:19 · 3 answers · asked by Anonymous in Other - Science

2006-10-17 05:52:31 · 4 answers · asked by joe seth s 1 in Other - Science

2006-10-17 05:48:29 · 10 answers · asked by brittenybryant 1 in Physics

what is the highest paying engineer jov(on average) and also what kind of engineers are there? could you list them from descending order and there average income from highest paid to lowest...

2006-10-17 05:48:18 · 7 answers · asked by Wlr Steve 1 in Engineering

2006-10-17 05:44:37 · 3 answers · asked by brittenybryant 1 in Physics

2006-10-17 05:44:34 · 5 answers · asked by pinkbtful 1 in Other - Science

2006-10-17 05:40:52 · 8 answers · asked by Chris M 2 in Earth Sciences & Geology

in Hawaii? and if so, please explain and do you have any points of reference?

2006-10-17 05:40:24 · 4 answers · asked by sweet ivy lyn 5 in Other - Science

2006-10-17 05:39:38 · 3 answers · asked by brittenybryant 1 in Physics

2006-10-17 05:38:36 · 3 answers · asked by matt_sorrentino 1 in Mathematics

2006-10-17 05:38:33 · 3 answers · asked by firebirdstevev 3 in Chemistry

Assuming that the world's most deadliest and advanced Nuke was used, how many miles (in radius) of damage would the immediate blast cause? After the initial blast, how far would the radiation reach (radiation concentrated enough to kill)?

2006-10-17 05:31:58 · 2 answers · asked by †ђ!ηK †αηK² 6 in Other - Science

what do you think of the discovery of penicillium?
what is your reaction, your feeling, to this discovery ?

1 paragraph

2006-10-17 05:28:53 · 4 answers · asked by puhahahha 1 in Chemistry

10kiloohm resistance with 10% tolerance and 20 kiloohm with 20% tolerance connected in series in first case and in parallel in second case. how to calculate total tolerance of the electrical circuit in each case

2006-10-17 05:20:25 · 6 answers · asked by Anonymous in Engineering

increase, decrease, or stay the same as the atomic number increases? I'm stuck here. Please give an explanation of why.

2006-10-17 05:18:31 · 2 answers · asked by ftz 6 in Chemistry

I think this problem is kinda interesting:

Let I be an interval of R and suppose f:I -> R is differentiable on I. Prove that there exists a subinterval of I where f is Lipschitz.

2006-10-17 05:18:04 · 1 answers · asked by Steiner 7 in Mathematics

The soil I`m trying to make a grounding system for, has a lot of contamination. Petroleum. And the soil is next to the beach.

2006-10-17 05:15:55 · 3 answers · asked by Daniel Peru 1 in Engineering

If humans had eyes as big as dinner pates, our visual powers would be improved in two ways:
a)What are the two ways?
b)Describe two ways that our visual powers would not be affected by having bigger eyes.
c)Use your answers to part (a) to explain why bigger telescopes are better than smaller telescopes.

2006-10-17 05:10:18 · 2 answers · asked by jun 1 in Astronomy & Space

I have several problems that I am stuck at, please help me out. Ive tried but cant seem to solve them.


Find the average rate ofchange of the volume of a cube who has side length x (v(x)= x^3) as x changes from 4 to 4.001

Under certain conditions the volume of V of a quantity of air is relted to the pressure p (which is measured in kilopascals) by the equation v(p)=9/p estimate the rate at which the volume is changing at the instant when the pressure is 40 kilopascals. round the answer to four decimals

2006-10-17 05:09:17 · 4 answers · asked by J_tinsey1 1 in Mathematics

how can a light particle travel at the speed of light without being infinitely heavy? Any mass accelarated to the speed of light becomes infinitely heavy.

What am I missing?

2006-10-17 05:04:23 · 4 answers · asked by Anonymous in Physics

There is a connection between the Micro and the Macro levels. One is constrained by the constancy of the speed of light when thought engines are created to answer special theory. Why is it that one can only work with the constancy of light and why is there so much confusion about this.?

2006-10-17 05:03:18 · 1 answers · asked by Mathew C 5 in Physics

2006-10-17 05:02:31 · 2 answers · asked by Anonymous in Botany

2006-10-17 05:00:46 · 7 answers · asked by DJ Rakim 1 in Astronomy & Space

2006-10-17 04:59:02 · 5 answers · asked by sparkyy2k2001 2 in Mathematics

water flows (v=0) over a dam at the rate of 650kg/s and falls vertically 81 m before striking the turbine blades.
Calculate (A) the speed of the water just before striking the turbine blades (ignore air resistance)
and (B) the rate at which mechanical energy is transferred to the turbine blades, assuming 58% efficiency.

2006-10-17 04:56:01 · 8 answers · asked by Anonymous in Physics

can anyone program the law of cosines into a graphing calculator, so that you can imput two sides and an angle to get another side?

2006-10-17 04:55:56 · 3 answers · asked by this Mike guy 5 in Mathematics

if a ramp is at a 45 degree angle by waht percent will a 1kg differ from freefall and going on a ramp downward. note gravity is 9.8m/s^2, what about a 30' angle ramp? where/what is a formula

2006-10-17 04:55:05 · 9 answers · asked by qwe 3 in Physics

I had a really cold bottle of water in the fridge, but there was no ice in it at all, none of it was actually frozen. When I poured it into my cup it turned to ice slush before my eyes. I repeated this stunt and my sister witnessed it, but I cannot explain it. It seemed to work better if I poured the water very quickly.

2006-10-17 04:54:50 · 13 answers · asked by Esteban 2 in Physics

2006-10-17 04:53:05 · 2 answers · asked by Samboat 1 in Biology