Science & Mathematics - 31 August 2007

2007-08-31 02:53:35 · 7 answers · asked by Anonymous in Astronomy & Space

Do all scorpians have long tails? are all pseudoscorpians tiny? Are any scorpians tiny? etc

2007-08-31 02:45:43 · 8 answers · asked by schming2005 1 in Zoology

2007-08-31 02:41:58 · 18 answers · asked by cutegemini 2 in Mathematics

1) If the longer base of an isosceles trapezium equals a diagonal and the shorter base equals the altitude, prove that the ratio of the shorter base to the longer base is 3 : 5

2) In a triangle ABC, the in-circle touches the sides BC, CA and AB at D, E and F respectively. If the radius of the in-circle is 4 units and if BD, CE and AF are consecutive integers, find AB, BC and CA.

I'll give a hint for the second one:
Use BD = x - 1, CE = x, AF = x + 1
Area of triangle = (1/2) * (In-radius) * (Perimeter)

2007-08-31 02:37:02 · 2 answers · asked by Akilesh - Internet Undertaker 7 in Mathematics

2007-08-31 02:35:47 · 10 answers · asked by Kenz 2 in Chemistry

2007-08-31 02:31:43 · 7 answers · asked by Jevon H 1 in Mathematics

South african Geology

2007-08-31 02:31:23 · 1 answers · asked by Anonymous in Earth Sciences & Geology

1. (sqrt(x+4) - 3)/(x-5)

2. (sqrt(x+4) - 3)/(sqrt(x-5))

I've started out by multiplying both functions by the conjugate of (sqrt(x+4)+3) but I still have the problem of having (x-5) on the bottom which gives me an answer of undefined.

How do I get rid of (x-5)?

2007-08-31 02:25:49 · 4 answers · asked by Anonymous in Mathematics

2007-08-31 02:23:31 · 3 answers · asked by Gruntled Employee 6 in Physics

Please help me out.

2007-08-31 02:22:21 · 3 answers · asked by Kim M 1 in Mathematics

2007-08-31 02:15:08 · 10 answers · asked by monicakryzelle_fortes 4 in Physics

The moon is a natural resourse and needs exploiting

2007-08-31 02:15:01 · 18 answers · asked by Anonymous in Astronomy & Space

Imagine a long bar, floating in space away from other sources of mass. Gravity will cause the bar to try to compress due to its own mass. So what force would I measure if I cut the bar in the middle and put a force meter there? Assume the bar has length L, cross-sectional area A, and mass M (and any other constants you think you need).

To a first order approxiamtion, this is easy. Split the bar in half and treat as 2 masses separated by L/2 (so the force is GMM/((L/2)^2).

But if this is true, you should get the same answer if you split the bar in 4 parts - but actually then the force is bigger. In fact, the more bits you split the bar into, the bigger force you get.

Same problem if I try integration - I always end up with one limit being 1/0 (ie infinite) at the middle of the bar.

If anyone can resolve this for me I'd be really grateful, I've asked a bunch of clever people and no-one's solved it yet!

2007-08-31 02:10:20 · 6 answers · asked by samthesuperfurryanimal 3 in Physics

A metallic sheet is8m by 5m. Its thickness is 3 cm. If the metal weighs 3.6 per cm cubed, then its total weight is
A. 4,32 kg
B. 43.2kg
C.432kg
d.4 320kg
e. 43200kg

2007-08-31 02:07:54 · 6 answers · asked by Anonymous in Mathematics

My son asked about that this morning. We have a coffee mug that when you pour hot liquid in it, makes a tiger appear on the outside. When the mug cools, the tiger disappears. He (and the rest of us) want to know how this "technology" works and what materials are used to make it work!

2007-08-31 02:06:20 · 2 answers · asked by Mooch 4 in Other - Science

scienstists claim that the present continents were once a single land mass and that there are signs of reunion of these continents though not shortly

2007-08-31 01:50:12 · 12 answers · asked by Simpson 1 in Astronomy & Space

2007-08-31 01:42:23 · 7 answers · asked by lola 2 in Physics

2007-08-31 01:37:19 · 2 answers · asked by Anonymous in Physics

Is there anything that can travel faster than the speed of light?

2007-08-31 01:30:26 · 16 answers · asked by Anonymous in Physics

2007-08-31 01:28:42 · 9 answers · asked by Anonymous in Mathematics

2007-08-31 01:27:07 · 5 answers · asked by Queen B 1 in Medicine

Can anyone help me to solve this sum

Use the compound angle formulae to find the following in surd form:
1) tan 75
2) tan 285

2007-08-31 01:19:46 · 3 answers · asked by Farabi 1 in Mathematics

I use premium 200 smoke fluid from www.zoommaunfacturing.co.uk.

2007-08-31 01:11:53 · 5 answers · asked by Paine 6 in Engineering

2007-08-31 01:07:46 · 7 answers · asked by vipinsam 1 in Agriculture

is apolluted water's strem allso polluted.

2007-08-31 01:06:15 · 4 answers · asked by Anonymous in Chemistry

lim sin(h) / h=1
as approaches to 0.

can anyone give me the solution why its limit is equal to 1.

2007-08-31 01:02:37 · 7 answers · asked by dee j 2 in Mathematics

Math wizards is this equation seriously right?


thanks in advance for your answer/s! ^.^

2007-08-31 01:00:20 · 16 answers · asked by nicole 2 in Mathematics

2007-08-31 00:59:57 · 6 answers · asked by Anonymous in Physics

Q.1 A steel tape is calibrated at 300 Kelvin. On a cold day temperature is -25 degree centigrade what will be the percent error change?
(Alpha of steel = 11*10^-6 per degree kelvin)

2007-08-31 00:50:17 · 2 answers · asked by Yahya B 1 in Physics

Physics Principle : Energy can neither be created nor destroyed.

Reference in Hinduism : Atma (inner soul, the energy) will not be destroyed, it moves from body to another.

2007-08-31 00:44:41 · 7 answers · asked by kirankumar a 1 in Physics