Science & Mathematics - 12 October 2006

I am a great fan of Terry Pratchett's discworld books, his details are usually fantastic or accurate (or both). But in "The Fifth Elephant" Detritus' giant crossbow has serious recoil - has Terry made a mistake ?

2006-10-12 06:00:19 · 18 answers · asked by Aspphire 3 in Physics

i heated some magnesium ribbon, bright light and heat were given off and i was left with a white powder.. i was also told the product was a base. what does that mean?

2006-10-12 05:57:01 · 3 answers · asked by Anonymous in Chemistry

rotation of the moon how fast in miles per hour does it rotate

2006-10-12 05:55:16 · 6 answers · asked by jan 1 in Astronomy & Space

For a university project, need to compare the prices of a bunch of different types of metals. Having a really difficult time finding the prices of things that are actually comparable.

2006-10-12 05:51:59 · 3 answers · asked by drunknmaster4 2 in Other - Science

2006-10-12 05:50:14 · 8 answers · asked by sammy 1 in Mathematics

2006-10-12 05:48:36 · 15 answers · asked by LUIS M 2 in Physics

is the sun out where you are today??

2006-10-12 05:48:08 · 12 answers · asked by Anonymous in Weather

2006-10-12 05:47:13 · 14 answers · asked by pd1973 1 in Geography

How does pressure affect temperature. As I understand as you increase pressure temp increases and vice versa. However how fast do objects return to room temp in a vacuum? Conversly if that same object is put under pressure how does that affect it going to room temp after it's heated???

2006-10-12 05:46:50 · 4 answers · asked by Anonymous in Physics

2. if the graph of the function f(x) = 4x squared - 20x - 4 intersects the graph of the function g(x) = 1 + 4x - x sqaured at the point (m,k), show that the other point of intersection occurs where x = (-1/m).

The asnwer for this question is -23/12. Please give the detailed steps clearly so that i can understand how this answer comes about.

Thanks in advance!

2006-10-12 05:46:08 · 4 answers · asked by Anonymous in Mathematics

The MFE iam taking about does not even need a battery of anykind. the car battering becomes a thing of the past, it is self generated, self relience and zero polution to the enviroment. futher more it also can be implemented on existing cars with engines of petrol they can be replaced in matters of days, the MFE as i call it, the abilities have been around but no one has the idea how to put it all together, and if they do, they sure no want to for some reason or another, to me if Sir Richard Brandson is going to spend 1 billion pounds over ten years towards the worlds problems which is polution, i only need 100 million pounds and 3/5 years to come up with the MFE, in my head it works in my drawing it works, why not in real scale, the mfe will replace all known engines in the world that uses petrol of anykind, from a motorbike to a plane, that is why my QUESTION IS, TELL ME WHY YOU THINK IT CAN NOT BE DONE????? i challenge you..

2006-10-12 05:45:55 · 6 answers · asked by crlsmonroe 1 in Engineering

2006-10-12 05:42:51 · 11 answers · asked by supremecritic 4 in Physics

The same applies to oil (fuel) where the US is still talking of barrels! For heavens sake!

2006-10-12 05:39:25 · 4 answers · asked by Anonymous in Mathematics

2006-10-12 05:37:48 · 10 answers · asked by Gary88 1 in Physics

1. Find the value of a such that the line y = 2x + a has exactly one intersection point with the parabola with equation y = x squared + 3x + 2.

Please answer this question by giving me each n every step because i have got to understand the logic behind it rite? But, just so that you knw, the correct answer is 1.75 and i dont knw how that answer was obtained.

Thanks in advance, guys!!

2006-10-12 05:36:57 · 7 answers · asked by Anonymous in Mathematics

The law of entropy says that over time, everything falls apart and becomes more disorganized and diffuse.

Evolution, though, is a process of increasing complexity and organization over time. How can this process be reconciled with Entropy?

2006-10-12 05:35:07 · 12 answers · asked by robert b 1 in Biology

2006-10-12 05:27:17 · 10 answers · asked by Anonymous in Engineering

2006-10-12 05:26:10 · 13 answers · asked by Anonymous in Physics

Best answer gets 10 points!

2006-10-12 05:25:17 · 5 answers · asked by xportuguesax 3 in Zoology

2006-10-12 05:22:28 · 4 answers · asked by Austin K 1 in Biology

2006-10-12 05:19:45 · 7 answers · asked by Anonymous in Earth Sciences & Geology

Has anyone heard of this or any other cool inventions? Where can i find them?

2006-10-12 05:19:18 · 16 answers · asked by Anonymous in Other - Science

Complete the factorization of each binomial

a^2 – n = a ( )

2006-10-12 05:19:05 · 4 answers · asked by SCHNITZEL 1 in Mathematics

I really need to have a science fair idea by monday, I have no idea what to do please help. I need a high school freshman level idea and I don't know where to start looking!!!!

2006-10-12 05:17:48 · 3 answers · asked by Curls 2 in Other - Science

2006-10-12 05:17:27 · 3 answers · asked by Red Falcon 1 in Mathematics

(-7)^19/(-7)^17
a)-49
b)1/-49
c)49
d)1/49

2006-10-12 05:14:05 · 2 answers · asked by Chunky 1 in Mathematics

220 mi. in 32 hours
a)55mi/32h
b)55mi/8h
c)4mi/32h
d)220mi/8h

2006-10-12 05:10:51 · 4 answers · asked by Chunky 1 in Mathematics

does the electrons revolve around the nucleus when it gets more energy as it is heated to a very high temperature.if it revolve so does the characters of the atom changes to that of an electromagnetic wave.

2006-10-12 05:10:19 · 3 answers · asked by sree 1 in Physics

2006-10-12 05:10:01 · 1 answers · asked by shams 1 in Engineering

a)11/23
b)12/23
c)11/12
d)12/11

2006-10-12 05:08:36 · 4 answers · asked by Chunky 1 in Mathematics