Science & Mathematics - 4 September 2007

what is the height of foolishness A woman bathing in a tranparent bathroom and a boy looking through the keyhole

2007-09-04 23:59:48 · 4 answers · asked by deb 2 in Biology

I know that the pythagoras' theorem is A squared plus B squared equals C squared. Can anyone tell me why this is true please put diagrams and also explanation. must be in Year 8 Maths.

2007-09-04 23:54:55 · 8 answers · asked by james 2 in Mathematics

I thought it looked so interesting, im not one to run around saying "there are weird creatures on this earth and im gonna prove it!!" I just really like the idea because it intrigues me.
I told my boyfriend being scared and cautious at first, but he burst out laughing and made serious fun of me because he doesnt believe in it. He said cryptozoologists are like the guy off of "white noise" the film. (sad old man). I mean I wouldnt make a career out of it, but it intrests me.
What do you think?
Is it stupid?

2007-09-04 23:54:11 · 8 answers · asked by Anonymous in Paranormal Phenomena

how can you improve the output from a lemon battery? And how can I do a experiment to text it?

2007-09-04 23:54:02 · 5 answers · asked by jkwunan 1 in Physics

help

2007-09-04 23:52:58 · 5 answers · asked by Seena j 1 in Biology

A sample of 1.00 x 10^8 hydrogen atoms confined to a cubical volume of 1.00 x10^-9 m^3 and at a temperature of 2.00 x 10^-8 K mass of the hydrogen atom 1.673 x 10^-27Kg

Can someone explain what happens as the gas above is cooled to below the temperature where indistinguishability becomes important?

I think it is to do with the fact it is a fermion gas and it obey's the Pauli Exclusion Principle

2007-09-04 23:48:58 · 3 answers · asked by walt 2 in Physics

CHOICES:
a. The energy of the movig objects before and after impact is the same time
b. The total momentum in an isolated system is constant
c. The mass of the objects before and after collision remains the same
d. the velocity of the objects before and after collision is the same.

If you have an answer please state the reason.
Thanks!

2007-09-04 23:42:32 · 4 answers · asked by Anonymous in Physics

At a junction of three wires, two of the wires have currents of +3A and -6A (+ means towards the junction). The third has an 8A fuse in it. Is the fuse likely to burn out?

I think u have to use Kirchoff's Law here, about all currents adding up to 0, but how does that answer the question?
Please explain?

2007-09-04 23:37:03 · 3 answers · asked by Anonymous in Physics

2007-09-04 23:25:00 · 1 answers · asked by Anonymous in Engineering

The detail about the question is needed because it's important to know how the negligence can happen in engineering field

2007-09-04 22:58:56 · 3 answers · asked by mew827 1 in Engineering

I got this question where you have to prove that a parralelogram that had all four of its vertices touching the circle was a rectangle.
I was wondering if anybody could explain how to do it.
Thanks

2007-09-04 22:52:26 · 7 answers · asked by Anonymous in Mathematics

cosecx / cotx + tanx = cosx

these trig stuff is difficult for me ): in addition to the solution, please add some basic tips and tricks/shortcuts to solving identites.

2007-09-04 22:49:05 · 6 answers · asked by Kendra 3 in Mathematics

hi all,
i have a few maths questions i would like to ask..
thanks to those who attempt to answer

1) On average, a baby is born somewhere in the world every 2 seconds. How many babies are born each year?

2) Is the variable "number of road facilities":
A-Ordinal
B-Nominal
C-Continuous
D-Discrete

3) Find the sum of all the two digit numbers that are made up of 2 even numbers.

Many, many thanks!!

2007-09-04 22:37:25 · 5 answers · asked by i love...love 2 in Mathematics

If not, what kind of radio waves can pass through walls?

2007-09-04 22:36:53 · 2 answers · asked by junior 1 in Physics

2007-09-04 22:32:17 · 16 answers · asked by Anonymous in Mathematics

2007-09-04 22:25:25 · 7 answers · asked by Rex R 1 in Physics

I am working on my algebra figuring the distance ... I have totally forgotten how to simplify a square root. Can someone please assist me here?

The answer is sq rt of 50 and the back of the book says the simplified answer is 2 sq rt of 17 and I have no idea how they got that.

Thank you in advance for any help you have to offer.

Candi

2007-09-04 22:15:01 · 8 answers · asked by snugga_bug 1 in Mathematics

Surely he'll be expecting you anyway.....

2007-09-04 22:08:01 · 11 answers · asked by Anonymous in Parapsychology

there will be no current without a potentiol difference,is there an existence of a current source?

2007-09-04 22:05:55 · 3 answers · asked by Anonymous in Physics

The earth's moon is very large compared to other planetary moons in our solar system. I seem to remember an experiment in school which showed that the earth and moon spin around each other - part of the reason we only see one side of the moon. Little help?

2007-09-04 22:05:45 · 23 answers · asked by tele-mon 2 in Astronomy & Space

Help please answer these questions about Hurricane Dean:
1. When did this occur or is it still occuring?
2. How and why did this happen?
3. What effect has this had on the surrounding environment and people? (Be specitfic about how the area has been affected and speciffically how the people in this area have been affected?)
4. What can we do about this? (Can we prevent this from happening in the furtue? Can we give warnings to people to save lives? What aid has been given to the areas?)

2007-09-04 22:05:11 · 2 answers · asked by australia_emileah 1 in Weather

2007-09-04 21:54:34 · 10 answers · asked by Anonymous in Mathematics

i think it is impossible

cos2x = cos^4 - sin ^4

please help
how to prove this

2007-09-04 21:52:35 · 7 answers · asked by master bert 2 in Mathematics

2007-09-04 21:51:44 · 2 answers · asked by stealth 1 in Engineering

i've been up all night trying to understand it but i cant please someone help me :(
http://img524.imageshack.us/img524/1196/untitledea2.jpg
hope u can undestand it from that picture i drew

Find i0, i1. and i2
please help me id be grateful forever

2007-09-04 21:50:52 · 3 answers · asked by Anonymous in Engineering

2007-09-04 21:32:57 · 1 answers · asked by suryya j 1 in Engineering

2007-09-04 21:30:04 · 6 answers · asked by Anonymous in Earth Sciences & Geology

... since, the birth rate of all the animals and human beings is creating a huge mass/weight from its bones, which will not decay. Thus, the bone weight will be added to the eath's mass/wieght.

hope I am clear.

2007-09-04 21:23:35 · 9 answers · asked by monosol 2 in Astronomy & Space

How does sugar interact with cyanide,can it be used as antidote,.

2007-09-04 21:22:03 · 3 answers · asked by salt 1 in Medicine

what is the name of the world's biggest desert?
a) kalahari
b) sahara

2007-09-04 21:21:30 · 14 answers · asked by Anonymous in Geography