Science & Mathematics - 21 July 2007

discuss the relationship of mechanical advantage of a machine to efficiency.

2007-07-21 01:31:44 · 6 answers · asked by cutejhynxsmile_026 1 in Physics

½ | 2x+1 |=3x

Im confused because there is a variable on both sides and I'm not sure how to move it with the absolute value

2007-07-21 01:31:32 · 7 answers · asked by Anonymous in Mathematics

ex: 7+9i = (8+i)(1+i)

2007-07-21 01:30:12 · 7 answers · asked by Motafael y 1 in Mathematics

2007-07-21 01:15:09 · 3 answers · asked by yuleydis77 1 in Mathematics

If you did the correct thing you will see that those 2 diagonal lines bisect each other at 90 degrees.

2007-07-21 01:14:40 · 8 answers · asked by tears 1 in Mathematics

2007-07-21 01:02:26 · 1 answers · asked by Amir 1 in Medicine

Find an implicit and an explicit solution to the initial value problem
dy/dx = (y^(2) - 1) / (x^(2) - 1), y(2) = 2.

Please show all workings - thanks.

2007-07-21 01:01:22 · 1 answers · asked by Ben R 1 in Mathematics

If I look at my rear view mirror (night position) during the day, I just see the back seats of my new car (Citroen C3) and not through the tailgate window. But at night, with the mirror in the same position, I do see througth the tailgate window, and the glare from the cars behind is reduced (as should happen I gather). Does anyone know of an online diagram that explains how this works? If not, could you please explain, in layman's language, how it works? Thanks.

2007-07-21 00:55:26 · 4 answers · asked by Anonymous in Physics

Consider the differential equation :
(1+y^3)y' = x^2
Determine a region of the xy-plane for which the differential equation would have a unique solution whose graph passes through a point (x0, y0) in the region (where 0 is subscript).

Please show all workings.
Thanks.

2007-07-21 00:52:57 · 3 answers · asked by Anonymous in Mathematics

Hi.
Can someone please help me rationalize this denominator:
1/ x(1-sqrt x) ; 1 divided by x times ( 1 minus the square root of x).
Can you please show me step by step so I can learn the method.
Thank you!

2007-07-21 00:48:55 · 3 answers · asked by F 6 in Mathematics

2007-07-21 00:29:26 · 9 answers · asked by Anonymous in Astronomy & Space

Mind you that i am searching for in-depth books and please dont post any best of amazon lists. I'd like to know by people's experiences.
Thank you all in Advance.

2007-07-21 00:25:36 · 5 answers · asked by memory_of_flight 3 in Astronomy & Space

i've got this question from my prof.
he said he borrowed it from a popular book...
but i just cant find it!!
any help out there???

2007-07-21 00:23:57 · 7 answers · asked by >D_ConTradictor< 4 in Physics

2007-07-21 00:14:23 · 11 answers · asked by ccaranay 1 in Mathematics

2007-07-21 00:13:04 · 9 answers · asked by ccaranay 1 in Mathematics

2007-07-21 00:11:58 · 10 answers · asked by ccaranay 1 in Mathematics

2007-07-21 00:10:33 · 12 answers · asked by ccaranay 1 in Mathematics

Especially on the military airfighters...

Why are mathematics so important for that ?

2007-07-21 00:03:53 · 4 answers · asked by Anonymous in Mathematics