Science & Mathematics - 21 August 2007

I pick up there is no one there. Is this ghosts?

2007-08-21 10:08:00 · 14 answers · asked by Anonymous in Paranormal Phenomena

Do you know what
35 over 100 reduces to?

and also

783 over 1000????????

and 3 over 100????


fractions

2007-08-21 10:02:58 · 10 answers · asked by Anonymous in Mathematics

2007-08-21 10:01:02 · 3 answers · asked by Anonymous in Medicine

In distillation, one needs to condense the vapor being produced; therefore a condenser is used. Cold water is passed through the condenser. There two ways to allow the water the flow, concurrent and countercurrent. What is the difference between concurrent exchange and countercurrent exchange? Which method is more efficient? Explain.

2007-08-21 09:58:40 · 2 answers · asked by bucsfan5520 1 in Chemistry

2007-08-21 09:58:36 · 11 answers · asked by Anonymous in Astronomy & Space

This is for school.So plz be serious.SCIENCE!!!!!!
How do you get a M&M from a yard long spoon.
2 ft. stick
1 foot spoon
stuck together with duct tape.please help me i did this now HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

2007-08-21 09:58:17 · 10 answers · asked by Anonymous in Mathematics

1. One advantages of optical fibres over ordinary cables of the same thickness is?

a) They are made of glass.
b) They can carry more information.
c) Their signals weaken more over long distances.

2. How do signals travel through optical fibres?

a) As microwaves
b) As radio waves
c) As infrared radiation

3. A signal that varies continuously in frequency is called?

a) A digital signal
b) An analogue signal
c) An AM signal

4) How many different states are there in a digital signal?

a) One
b) Two
c) Three

5. Which type of signal maintains its quality the best?

a) Digital signals
b) Analogue signals
c) Both types are the same

Do as much as you know and if you could EXPLAIN in that will really help Cheers!

2007-08-21 09:57:49 · 4 answers · asked by Anonymous in Physics

I understand most of relativity but one thing bugs me.
I can't figure out where my understanding is flawed in this one scenario:
If I head off at near-c, look around, and head back, then relative to you I've been travelling very quickly and will have experienced less time.
However, relative to ME you've been the one that travelled at near-c in one direction and then near-c in the other. If all perspectives are relative, then why when I came back would you have experienced more time than me?

This has been bugging me for over 4 years, but in trying to write out the question clearly and without confusion I figured it out. Now I'm going to ask it anyways since it's interesting and the answers might be insightful.

2007-08-21 09:55:13 · 4 answers · asked by tristanridley 2 in Astronomy & Space

2007-08-21 09:51:56 · 3 answers · asked by chelsea s 2 in Astronomy & Space

Please Help me, I'm very confused, and these don't seem to be coming out right. My textbook and notes aren't helping.

1- [@ = theta] Solve for ALL numeric values of @:

tan @+8/5 + tan@-1/tan @ = 1

2- Prove the identities:

(a.) tan x + cot x/ (cos x) (sin x) = (sec^2 x)(csc^2 x)

(b.) sin 2x= 2 tan x/1+ tan^2 x

3- The angle of elevation from the ground to the top of a toper is 40 degrees. A person then walks 300 meters closer to the tower and the angle of elevation is now 60 degrees. (a) What is the height of the tower (in meters)?
(b) What is the distance from point A to point B the distance the person walks (in meters)?


*Please help explain these to me step by step, I have to understand these concepts for an upcoming exam. I would really appreciate the help. Thanks!

2007-08-21 09:49:18 · 2 answers · asked by Anonymous in Mathematics

I am looking for a general cooling formula for white dwarfs that can possibly be used in relation to age.

2007-08-21 09:48:33 · 4 answers · asked by julianri90 1 in Astronomy & Space

Does it matter if i install the panels in series or in parallel? i already know abput the batteries but i'm not sure if it matters with the panels too.

2007-08-21 09:45:35 · 7 answers · asked by Anonymous in Engineering

2007-08-21 09:39:40 · 3 answers · asked by Anonymous in Biology

http://tierneylab.blogs.nytimes.com/2007/08/20/is-there-anything-good-about-men-and-other-tricky-questions/index.html?hp

Do you agree?

2007-08-21 09:37:09 · 13 answers · asked by xoil1321321432423 4 in Biology

With all our studies and research, how is it that we (The entire scientific knowledge of the World) are unable to create the simplest of life forms like the amoeba, paramecium, euglena and the flagella?

We have studied the RNA, the DNA, the Mitochondria and Ribosome’s. We know the protein chains and the PSA PTA reactions. We understand the enzyme interfaces and arobic resperation process.

We toy with life... cloning, morphing and even re-engineering it.

So why haven't we tried creating life... from scratch?

2007-08-21 09:34:25 · 11 answers · asked by BeArPaW_4709 4 in Biology

I really just can't remember how to do this, it's terrible. The answer and how you did it please!

2007-08-21 09:31:35 · 15 answers · asked by MAC Addict 2 in Mathematics

How many voltage pulses would occur in each of the following for a HALF-WAVE-RECTIFIER?
a. 20 msec
b. 1/40 sec
c. 500 msec

2007-08-21 09:26:48 · 1 answers · asked by Anonymous in Engineering

2007-08-21 09:26:30 · 2 answers · asked by Anonymous in Chemistry

2007-08-21 09:26:17 · 6 answers · asked by ineedanswers 3 in Other - Science

my friend and i are having a disagreement..........so is a butterfly a animal?

2007-08-21 09:18:46 · 12 answers · asked by kat 1 in Zoology

approximately 30% of all homes in a locality have washing machines. what is the probability that in a sample of 80 homes from that localty fewer than 20 would have washing machines?......kindly and 1 can give the solution of this problem

2007-08-21 09:18:38 · 6 answers · asked by sandy 1 in Mathematics

What is the tie (if any) to our sun's natural cycle of warming and cooling have to do with the climate on our planet ?
As I understand, a new backwards facing sunspot was discoverd reacently and it had been observed that in the past when backward sunspots appeared it would seem to be a precurser to a more active solar flare season too come.

2007-08-21 09:18:01 · 3 answers · asked by sbluta2 2 in Astronomy & Space

i just need the names of the parts that are used on most maps, please be as specific as possible..... i need this by today for homework!!!

2007-08-21 09:15:31 · 2 answers · asked by Christaangel 1 in Geography

The context is a company which provides security in metallurgy industry. I don't have any other tip!!!

2007-08-21 09:13:47 · 1 answers · asked by unicornius 1 in Chemistry

Convert the following equations into logarithmic form:
a. 9 = 4x
b. 3 = 6y
c. 5 = 7y
d. X = 9y

2007-08-21 09:11:39 · 4 answers · asked by austin 1 in Mathematics

What does this number mean to you?

2007-08-21 09:08:18 · 3 answers · asked by Zone 7 Seventy 7 1 in Mathematics

some time in our lifetime do you think genetic engineering will be able to create new animals like that from mythology or stories (hippogriff, unicorns,etc) no stupid answers please

2007-08-21 09:07:54 · 5 answers · asked by ecoli 2 in Engineering

Special Relativity tells us that we can't go light speed. But speed can only be measured in relation another reference frame. Since there's no absolute speed what reference frame do we measure speed against to know if wer're approaching light speed?

I hope that makes sense.

2007-08-21 09:07:01 · 8 answers · asked by Anonymous in Physics

I would like to see a visible spectrum photograph of the Sun taken from, say, the Hubble telescope, the surface of the Moon, or an orbital satellite.

Does anyone know of such a picture link on the Internet?

2007-08-21 09:06:52 · 6 answers · asked by the_Bo0geYmaN 2 in Astronomy & Space

It is found that a particular system obeys the relations
U = PV and P = BT2
where B is constant.
Find the fundamental equation of the system.

2007-08-21 09:04:33 · 1 answers · asked by g2hn 3 in Physics