Science & Mathematics - 19 October 2007

2007-10-19 05:09:00 · 9 answers · asked by andrew l 1 in Astronomy & Space

ive just realized something about our current ways of looking for exoplanets. usually large observatories look at stars for long periods of time and wait for the planet to pass by the sun so we cant see it, and if that happens we know there is a planet there.

but think about how many flaws that has. it could be a cloudy night and you could compeltely miss it.

also, the planets have to be fairly large in comparison to their star in order for it to completely cover up the light coming from it. that means our search for an earth like planet is never going to work because all we can find are gas giants and rarely some massive solid planets.

and the biggest one. it only works if the earth, the star, and the orbit of the planet are in one plane. if their not all exactly in a line then the planet will never cross infront of the star and well never see it.

theres got to be a better way...are there any other techniques out there?

2007-10-19 05:07:43 · 4 answers · asked by Anonymous in Astronomy & Space

A velodrome is built for use in the Olympics (the figure below). The radius of curvature of the surface is 15.7 m. At what angle should the surface be banked for cyclists moving at 15 m/s? (Choose an angle so that no frictional force is needed to keep the cyclists in their circular path. Large banking angles are indeed used in velodromes

the angle answers should be in degrees, please besides answering it, explain the problem to me, I dont know where to start or anything, thank you!

2007-10-19 05:03:04 · 3 answers · asked by ? 2 in Physics

2007-10-19 04:59:18 · 2 answers · asked by southernmdguy1976 1 in Mathematics

These are pictures I took of a Spider in my apartment and I'm having trouble finding out what kind it is. This was taken in Southeast Florida if it helps. The best picture to look at in my opinion is Spider_10082007_000006 (http://www.flickr.com/photos/pulpmilos/1519805813/). Thanks.

2007-10-19 04:54:46 · 11 answers · asked by pulpmilos 1 in Zoology

Pls pls tell me and I need this for my chemistry hwk!

2007-10-19 04:53:05 · 4 answers · asked by TerryChoco 2 in Chemistry

Its my birthday, and I really want to go, but is it ridiculus because of the forecast??

2007-10-19 04:51:28 · 6 answers · asked by Anonymous in Weather

does it continuously travel in the space?

i am really interested in finding out the answers.

2007-10-19 04:49:28 · 7 answers · asked by Buknoy 1 in Physics

I have a thought about ice cap melting: would it be possible to dredge a deep enough hole in the ocean to accommodate all the melted water so that the land above the water would not disappear ??

2007-10-19 04:44:43 · 2 answers · asked by Anonymous in Earth Sciences & Geology

a sine wave has an instantaneous voltage of 60 volts after 90 deg. of rotation. what is the instantaneous voltage reached by this waveform after 110 deg. of rotation? this is for school, and my book does not really explane it very well...

2007-10-19 04:41:16 · 5 answers · asked by Anonymous in Engineering

can any one temme areas in which AI can be applied to BI

2007-10-19 04:40:30 · 2 answers · asked by meenu 1 in Engineering

2007-10-19 04:39:10 · 1 answers · asked by ac_jim 1 in Botany

2007-10-19 04:38:34 · 11 answers · asked by Missy 1 in Mathematics

1) A car moves with uniform velocity, v1, for one-third of its journey. The car then moves with velocity v2=20 km/h to complete the journey. If the average velocity of the car is 27 km/h for the whole journey, find v1.

Can you pls show the formula and workings to complete this question? thank you!

2) A pupil runs round a circular field of radius 70 km. If he uses 40 minutes to complete one round, what is his velocity?
Is the answer 0km/min or 11km/min? Since velocity is related to displacement and the pupil's displacement remains 0.

Thank you for taking this time to answer my questions... =)

2007-10-19 04:35:52 · 3 answers · asked by anonymoustjl 2 in Physics

2007-10-19 04:35:16 · 2 answers · asked by Yopeople 1 in Mathematics

2007-10-19 04:33:37 · 13 answers · asked by ceegee13 2 in Chemistry

gravity be used to transport information from point a to point b without time being a factor?

http://www.metaresearch.org/cosmology/speed_of_gravity.asp

2007-10-19 04:29:48 · 11 answers · asked by impstout2 4 in Physics

It's just a simple circuit with a power supply n resistors in series & parallel. I just need to know the factors that affect our results.

2007-10-19 04:29:26 · 3 answers · asked by Nate 2 in Engineering

what is the derivation of

a = g times m over m plus M

a= acceleration
g= gravity
m= mass
M = mass of the glider

explanation please thank you

2007-10-19 04:20:21 · 2 answers · asked by azra k 1 in Physics

Question comes from Jean-Jacques Rousseau's "The Government of Poland". The question arises from paragraph 7 from chapter I, "The Issue Posed". The question is about how to square a circle, or if it is even possible. One major part is that it does not identify the part to be squared, only the circle itself, but I'm sure someone with a mathematical background will be able to easily explain how "Putting law over men" can be related and compared to "the squaring of a circle in geometry." Thanks.

2007-10-19 04:09:57 · 3 answers · asked by battleb0rn 1 in Mathematics

2007-10-19 04:09:25 · 1 answers · asked by CST 1 in Physics

2007-10-19 04:05:21 · 3 answers · asked by CST 1 in Physics

whom says he can prove God exists?

2007-10-19 04:01:35 · 4 answers · asked by Life goes on... 6 in Physics

it is possibly a frequency analysis cipher

RMSTA TERYT SYLPI ARELE DAOHN OMIDT RFGHO ITTNH ASERM TBDHE UWTLO HAEAT IHTDE OTIFY RNEMO HNEET
ITEVG ELEYS NYNEO DOTAL NAHTS HNAED NGATE EFAER IKOSE HBYOE MSUAT MHYJI LERLA IEHSM EYATB EOHMP
NSIEO RHTEE ETPMH TOTOS OROWH EAENR ETMRH HFOET NMWYA HONOW TODKN WEHEM HTATC EFICW DWLOE ITALW
WNAHD OLLUY KLIIL YHTWE OHCUY AYETC TIKHF ISUSR MONOR NGNEA KTTIA OTIUH TODWI TOHOW ETNES DTUOI
NPOBE HOTET IEHNM WRDTA BAMEY NEGDA TAVAN AUODR TCAOT SHTFI SOTEU RDLYT OEWUC RPSTO ARUSP YOSOR
RCKDA ARUNB YSUOE TONOT SESEN HDAET EAHHV OSSUY UIOEG OESDT EAHLT WNKWO NDITO NGLEO AAHLS ICNTE
DAWON NOLOW NNNGI RAIUM CISEN EEMRV HNOET NVIGI NEBLE VHIEA NTNDA DCCEI ETEAH OEBRF SJSTU NVAGI
YTUSM RELOA ODECT AAMGN YNOIE ETTML LREIY DATVN OSSRP PNTAO UCCNO KABAN NNAOS MCIEH WROHE YATMN
IEYSX LICLA FOTIF OIRND VROEE WLEFO LSUIT TACJN WHGET RRAIE OYTUY NRTII

2007-10-19 03:59:09 · 1 answers · asked by exboomer12 1 in Mathematics

1.4(sqrt x^3)
2.(sqrt t)
3.4(sqrt x^7)
4 1/5(sqrt x^2)

2007-10-19 03:56:54 · 5 answers · asked by khadijahdc41 1 in Mathematics

2007-10-19 03:55:18 · 2 answers · asked by edd 1 in Physics

Professor Haigh watched a man digging a hole outside the Mathmatics Hall at Northern State University. "how much deeper are you going?" he asked. Knowing where he was working, the digger replied, "I am one third done; and when I am finished the top of my head will be twicea s far below grounda s it nw is above ground." The professor said, "i'll need to know your height if I'm to figure the answer to my question." The man then said that he was five feet, ten inches tall. How deep will the hole be when it is finished?

2007-10-19 03:53:40 · 2 answers · asked by Cory J 2 in Mathematics

2007-10-19 03:44:10 · 13 answers · asked by Richard C 3 in Biology

What is the 1st, 2nd,3rd, and 5th term? Does anyone know the answer please help

2007-10-19 03:39:38 · 3 answers · asked by darrilyn p 1 in Mathematics

Recently in my apartment I have seen the biggest spider ever!! (to me anyways lol)...It is grayish in color...has a big abdomen...I live in NC if that makes any difference...I know this isn't a great description but I am really freaked out by spiders and am just wondering if this kind could be harmful to me! Thanks!

2007-10-19 03:38:44 · 3 answers · asked by Cass 1 in Zoology