Science & Mathematics - 3 November 2006

Can you tell if something is warm or cold?

2006-11-03 05:33:41 · 5 answers · asked by ? 3 in Other - Science

2006-11-03 05:29:39 · 13 answers · asked by iPhaze 1 in Astronomy & Space

1. Suppose a driver springs into the air with no initial angular velocity. can the driver begin to rotate by folding into a tucked position?

2. Suppose a torque rotates your body about one of three different axes of rotation: case A, an axis through your spine; case B, an axis through your hips; case C, an axis through your ankles. Rank these three axes of rotation in increasing order of the angular acceleration produced by the torque.

3. A fish takes a bate and pulls on the line with a force of 2.1 N. The fishing reel, which rotates without friction, is a cylinder of radius 0.055 m and mass 0.84 kg. (a) What is the angular acceleration of the fishing reel? (b) How much line does the fish pull from the reel in 0.25 s?

2006-11-03 05:28:00 · 1 answers · asked by AnnaQ 1 in Physics

ie if more light was going in that coming out

2006-11-03 05:22:43 · 2 answers · asked by lucasbuckteacher 1 in Physics

What passageway is shared by both food an air?

2006-11-03 05:19:51 · 1 answers · asked by chris76ers1 3 in Biology

2006-11-03 05:18:42 · 3 answers · asked by blackcats 1 in Botany

2006-11-03 05:17:38 · 2 answers · asked by naurinbutt 1 in Physics

2006-11-03 05:16:15 · 3 answers · asked by Anonymous in Geography

For example Germany developed the maglev train and has wonderful mashines such as its cars. It's pretty advanced in sciences too and nanotechnology and robots and stuff. Things like this! Technology in General? Which do you think are the four most advanced countries in technology?

2006-11-03 05:14:11 · 3 answers · asked by eduardo a 1 in Other - Science

What type of cell in sponges pick up food,digests it, and carries the nutrients to other cells?

2006-11-03 05:14:01 · 1 answers · asked by chris76ers1 3 in Biology

Please no long detailed answers.

2006-11-03 05:13:47 · 3 answers · asked by NYC BOY! 1 in Chemistry

I know it can eat through various substances, but what substances can be used to create containers it can't eat through?

2006-11-03 05:13:18 · 1 answers · asked by Anonymous in Chemistry

I remember watching a documentary about it once but I would like some more information on the subject please.

2006-11-03 05:11:43 · 5 answers · asked by iPhaze 1 in Physics

3 kg object attached to a horizontal spring oscillates with A=10cm and f = 2Hz. find...
a) force constant of the spring
b) period
c) max speed
d) max acceleration

2006-11-03 05:11:16 · 2 answers · asked by ry 1 in Physics

2006-11-03 05:07:29 · 3 answers · asked by Lindsey F 1 in Geography

Jungle Jim sees a signal on the top of an escarpment (a tall cliff) at an angle of elevation of 10 degrees. Later, after moving 1000 meters, the angle of elevation is 32.5 degrees. How tall is the escarpment?
I've tried to figure the question out a few ways with no luck. What would be the equation I would use with my scientific calculator??? This is the last question I have to do and have successfully done the rest on my own. Can anyone help?

2006-11-03 04:47:03 · 3 answers · asked by Kris S 2 in Mathematics

According to Wikipedia (http://en.wikipedia.org/wiki/Lake_Chad ):

"Lake Chad is believed to be a remnant of a former inland sea which has grown and shrunk with changes in climate over the past 13,000 years....Climate change, due in part to global warming, and increased demands on the lake's water have accelerated its shrinkage over the past 40 years....It seems likely that the lake will shrink further and perhaps even disappear altogether in the course of the 21st century....The lake nearly dried out in 1908 and again in 1984 and has an average depth of only 1.5 metres."

If Lake Chad has shrunk repeatedly in the past, then why is it now so worrisome? Is its current shrinking part of a normal cycle for the lake, or is global warming (or human usage or something else) making this worse than the past shrinkages? Is this shrinking permanent?

Lake Chad is often used as a prime example of global warming, but I don't understand how the current shrinkage is different than in the past.

2006-11-03 04:36:10 · 1 answers · asked by ohyesidid 2 in Earth Sciences & Geology

For some reason I'm drawing a blank on this! (I'm so embarassed!) I need to calculate averages and ranges from a list of information, what do I need to do for each? Thanks so much!

2006-11-03 04:09:24 · 31 answers · asked by skymgirl 1 in Mathematics

i m doing a project on ecg signal analysis using pc what are the software that can used for data acquisition and for analysis purpose

2006-11-03 04:07:13 · 2 answers · asked by viral s 1 in Engineering

i nned help and fast i need a hypothesis for my school science fair and i need a good 1 for incubating chicaken eggs ...im planing on going 2 the regional science fair..sound kinda of dorky.lol....plz help

2006-11-03 04:04:52 · 5 answers · asked by Anonymous in Biology

give me details about electric propulsion system in ships..

2006-11-03 04:03:29 · 5 answers · asked by sakthi . 1 in Engineering

You may recignize this question if you have an 8yr old . It"s rite out of the cub scout handbook .Anybody know of a web site I can go to ta find out if anybody keeps track of how fast and what species we are whippin off the planet every day or if you can think of a few animals answer this and I"ll research it myself TY

2006-11-03 04:03:17 · 15 answers · asked by Anonymous in Zoology

2006-11-03 03:53:03 · 10 answers · asked by furbush 1 in Biology

Tap water contains small amount of calcium hydrogen carbonate. Why does ir produce "scale" when heated? What is the chemical composition of "scale"?

2006-11-03 03:51:11 · 6 answers · asked by Max Camer 1 in Chemistry

2006-11-03 03:48:53 · 6 answers · asked by Max Camer 1 in Chemistry

the mid atlantic ridge begins and ends most of its existence underwater, but just where would you say it is? help pls.. thnks

2006-11-03 03:48:50 · 3 answers · asked by Anonymous in Earth Sciences & Geology

I am looking for quality people in Houston, TX to build a centrifugal fan using airfoil blades which moves air out radially (in all directions) on an electric engine with minimal weight (of the machine assembly).
I am also interested in instructions on how to construct a quality product myself without expensive tools (even with toothpicks and straws, tape and glue, if it accomplishes the mission).

2006-11-03 03:48:30 · 3 answers · asked by Andy 4 in Engineering

2006-11-03 03:48:20 · 4 answers · asked by Anonymous in Botany

2006-11-03 03:47:06 · 3 answers · asked by daddysgirl9310 2 in Geography

2006-11-03 03:46:34 · 5 answers · asked by Leslie P 1 in Geography