Science & Mathematics - 10 August 2007

1. Satellite ground operators use the feedback from a device called magnetometer, which senses the direction of Earth's magnetic field, to decide which torque coil to activate. what direction will the magnetometer read for earth's magnetic field whrn the satellite passes over earth's equator.

2. In order to protect other equipment, the body of a satellite must remain unmagnetized, even when the torque coils have been activated. Would hard or soft magnetic materials be best for building the rest of the satellite?

2007-08-10 12:13:32 · 2 answers · asked by Brilliant Queen (BQ)_forever !!! 5 in Physics

If not hope you make a million dollars on this idea and give me some of it.

2007-08-10 12:01:43 · 1 answers · asked by Anonymous in Earth Sciences & Geology

The spin of the Earth tends to pull us away from the surface but gravity is stronger. How much faster would the Earth have to spin to weigh 100 lb?

2007-08-10 11:59:31 · 2 answers · asked by Zefram 2 in Astronomy & Space

explain w/ example

i dont get this

2007-08-10 11:52:28 · 13 answers · asked by boredgirlb 1 in Mathematics

Will they?

2007-08-10 11:52:11 · 5 answers · asked by Anonymous in Medicine

2007-08-10 11:48:59 · 4 answers · asked by loveya36 1 in Mathematics

2007-08-10 11:41:05 · 7 answers · asked by Zelda Hunter 7 in Zoology

2007-08-10 11:38:27 · 9 answers · asked by SAMMY P 1 in Weather

2007-08-10 11:27:44 · 13 answers · asked by Anonymous in Physics

Find the radius of curvature and the coordinates of the center of curvature of the curve y=x^3-x-1 at the points for which x= -2, x=0, and x=1
thanks

2007-08-10 11:23:53 · 2 answers · asked by roguetrader12002 4 in Mathematics

By using the factor theorem, find the prime factors of the polynomial: x^3-x^2-17x-15

2007-08-10 11:14:25 · 1 answers · asked by aimeikins711 1 in Mathematics

That's dumb...

2007-08-10 11:12:28 · 11 answers · asked by Anonymous in Astronomy & Space

i am conducting a research project involving identifying bacteria. i obviously as a high school senior don't know how so i need some tips or books i can buy or a website. i can identify characteristics just have never obtained any knowledge of names. any help????

2007-08-10 11:10:48 · 10 answers · asked by Jess... 2 in Biology

If two animals are dependent upon each other for their survival did they evolve at the same time some how knowing that they would need each other?

2007-08-10 11:10:38 · 13 answers · asked by Danny K 5 in Biology

Temps above 100 are not good. Why should he say better instead of "more"?

2007-08-10 11:09:37 · 4 answers · asked by Renaissance Man 5 in Weather

what is the difference between them.im currently majoring in civil engineering. everyone tells me that the money is in structual engineering. whats the difference? and do i need a seperate degree or somthing

2007-08-10 11:09:24 · 6 answers · asked by jeff c 2 in Engineering

Everybody knows that global warming is a really hot topic in our world!!!!

But does anybody try to stop it?

What do you think about global warming???
What would you do to stop it??

2007-08-10 11:05:21 · 9 answers · asked by Anonymous in Earth Sciences & Geology

4n/ab - c/m = x

thanks in advance for any help

2007-08-10 11:04:45 · 5 answers · asked by Heyr89 1 in Mathematics

2007-08-10 11:03:20 · 4 answers · asked by Anonymous in Astronomy & Space

2007-08-10 11:01:34 · 2 answers · asked by Anonymous in Botany

2007-08-10 10:56:50 · 8 answers · asked by Anonymous in Astronomy & Space

Mass=1kg(M), which is immobile and is standing on the equillibrium point,is attached on a spring with k=400N/m.We move the mass M to a point D which is d=0.2 m away from the equillibrium and then we set it free to move.At the moment t=0 the mass M passes from the equillibrium for the first time and it collides (headon collision) plastically with another mass m=3 Kg which is moving with u2 velocity.The new (M+m) body just after the collision has a velocity with the same direction of the velocity of mass M just before the collision and it immobilizes for a moment for the first time after its creation to a point E which is d1=0,25m away from D.
Find
1) the Energy of the oscillation of the body (M+m)
2)the u2.
3)the percentage of the kinetic energy of the wo masses beforethe collision,which turnd into heat because of the collision.

Hint:m1 is moving to the left,m2 is moving to the right.

2007-08-10 10:54:41 · 1 answers · asked by Joey 1 in Physics

2007-08-10 10:54:40 · 7 answers · asked by Anonymous in Engineering

I read someone say math is evil, has anyone hear this? Where did this come from?

2007-08-10 10:54:13 · 6 answers · asked by roguetrader12002 4 in Mathematics

2007-08-10 10:53:20 · 16 answers · asked by knightmare365 2 in Physics

i remember that it is a very rare snake and only grows about 2 inches long, its skin is streched over its ribs so it can glide in the wind, can anyone help me with this any one know what the name for it is?

2007-08-10 10:52:04 · 3 answers · asked by the cure 1 in Zoology

2007-08-10 10:51:59 · 3 answers · asked by Anonymous in Engineering

I tried google but didn't come up with anything so far, do any of you know of some good resources for VHDL port mapping (xilinx ise). Thanks

2007-08-10 10:50:47 · 1 answers · asked by Galbadian 2 in Engineering

Molar Mass is 74.6 grams

2007-08-10 10:49:56 · 4 answers · asked by chato r 1 in Chemistry

i've had this watch about 10 years. i have a cheaper one that i've had about 20 yrs and it still runs.

2007-08-10 10:49:37 · 2 answers · asked by mcollinsvcollins2003 1 in Earth Sciences & Geology