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Science & Mathematics - 18 October 2007

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I Want To Make A Robot That Goes Forwards And Backwords. I Want It To Be Little. How Can I Do This?

2007-10-18 13:52:14 · 8 answers · asked by Hey 1 in Engineering

A block with mass m = 12.9 kg slides down an inclined plane of slope angle 22.6 ° with a constant velocity. It is then projected up the same plane with an initial speed 4.80 m/s. How far up the incline will the block move before coming to rest?

2007-10-18 13:52:06 · 2 answers · asked by Anonymous in Physics

I am doing a bug report in my science class, and I need a bug but i can't decide wat to do. HELP!!!!!!!!!!!!!!!!!

2007-10-18 13:51:04 · 10 answers · asked by jesusfreak101 1 in Zoology

solve this problem. The sum of 4 consecutive even intergers is 44, find all 4 intergers.

2007-10-18 13:50:20 · 9 answers · asked by valley1800 5 in Mathematics

Harry falls out of a helicopter traveling 100 m/s. He plunges into a swimming pool 2 seconds later. assuming no air resistance what was the horizontal distance between harry and the swimming pool when he fell out of the helicopter?

A girl throws a slingshot pellet directly at a tarfet that is far enough away to take one hald second to reach. How far below the target does the pellet land and how high should she aim?

the simpler the answer but most descriptive the better
Please help =]

2007-10-18 13:49:36 · 1 answers · asked by njswimchick99 1 in Physics

Like tips, dark skies, uhmm how can i get the best quality. I have an Orion SpaceProbe 3" Altazimuth Reflector Telescope. Please giv eme some tips on this. Thanks in advance.

2007-10-18 13:47:56 · 4 answers · asked by i_olide 2 in Astronomy & Space

2007-10-18 13:46:57 · 5 answers · asked by Anonymous in Astronomy & Space

Need help solving:

3.07 moles CO2 into liters? Please briefly explain to me, thank you so much! I don't just want an answer.

2007-10-18 13:41:19 · 0 answers · asked by ashley 1 in Chemistry

what about alkali metals and monoatomic atoms?

2007-10-18 13:38:34 · 1 answers · asked by DeepNight 5 in Chemistry

Find the critical points. Then find and classify all the extreme values:

(I) f(x) = 2x^2 +5x -1, x E [-2,0]

(II) f(x) = x^2 / (1+x^2), x E [-1,2]

Where E is that sideways looking M, not sigma (unless they mean the same thing?).

(III) f(x) = sin2x - x, 0<=x<=pi

Explain your work. Thanks! :)

2007-10-18 13:38:24 · 1 answers · asked by Anonymous in Mathematics

Try it. and whoever gets it gets 10 points.

2007-10-18 13:38:04 · 4 answers · asked by Jack D 1 in Biology

2007-10-18 13:35:02 · 2 answers · asked by Terri L 2 in Biology

2007-10-18 13:35:02 · 12 answers · asked by faithnia 1 in Mathematics

Such disorders are red-green color blindness, hemophilia, and muscular dystrophy. Why are they more common in males?

2007-10-18 13:33:41 · 5 answers · asked by celestial_yellow_munky 1 in Biology

2 identical loudspeakers ar eplaced ona wall 2m apart. A listener stands 3m from the wall directly in front of one the speakers. A single oscillator is driving the speakers at a frequence of 300Hz.
a) what is the pahse different b/w the two waes when the reach the observer?

2007-10-18 13:33:18 · 1 answers · asked by Anonymous in Physics

Early one October you go to a pumpkin patch to select your Halloween pumpkin. You lift the 3.8 kg pumpkin to a height of 1.08 m, then carry it 50.1 m (on level ground) to the check-out stand.
(a) Calculate the work you do on the pumpkin as you lift it from the ground.

(b) How much work do you do on the pumpkin as you carry it from the field?

2007-10-18 13:30:21 · 1 answers · asked by Anonymous in Physics

1-20 20-40 40-60?

1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31.32,33,34,35,36,37,38,39,40,41,42,
43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60?

2007-10-18 13:28:49 · 37 answers · asked by breezy may 1 in Mathematics

anyone know?

2007-10-18 13:25:43 · 1 answers · asked by ME! 2 in Mathematics

Because the last few ice ages were in diffrent regions, is it possible these are because of the earths poles shifting, causing new polar regions?

2007-10-18 13:24:54 · 4 answers · asked by SwiftKill 4 in Earth Sciences & Geology

I'm doing a project for biology and I'm wondering what you guys think the world population would be in year 10,000 and why you think that. k thx :)

2007-10-18 13:24:22 · 11 answers · asked by Anonymous in Earth Sciences & Geology

so somehow i am suppose to prove that the 45 degree angle gives the biggest displacement. my teacher walked us through half of the steps and left us from there, help me figure out why the 45 degree angle gives the biggest displacement

it starts like this
x= the angle
Vyi [vetical initial velocity] V sin x
Vx- V cos x
Vyf - 0
T= ?
a[ acceleration due to gravity] =g
dx- horizontal displacement

to find the time in terms of v
Vf= Vi+at and from there we got t= [-Vsin x ]/ g

then to find the displacement
dx= V*t
dx= V cos x * [-Vsin x ]/ g
dx=[ -V^2] g * cos x * sin x

and we are suppose to take it from there , i understand that -[V^2] g part is a constant and the whole displacement basically depends on cos x * sin x and this is what is suppose to be the biggest. please show how u got that 45 degree angle gives biggest displacement. thanx

2007-10-18 13:24:08 · 1 answers · asked by Anonymous in Physics

Which Date in noon is the shadow of a flag pole shortest?
pick one answer from below that is actually RIGHT
a - March 21st (vernal equinox)
b- June 21st (summer Soltice)
c- September 21st (autumnal equinox)
d- December 21st (winter solstice)

Best answer goes to person who is right.

2007-10-18 13:23:39 · 4 answers · asked by Keiro S 2 in Weather

It looks really simple and yet I can't figure it out! Bleh!

2007-10-18 13:23:33 · 2 answers · asked by Anonymous in Mathematics

okay the math problem is
97x+ -34 (93) + -37x= ???????
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!

2007-10-18 13:21:18 · 3 answers · asked by Anonymous in Mathematics

some nonmetal elements form diatomic molecules, consisting of two atoms bonded together. how does the reactivity of a diatomic molecule compare to that of an unbonded atom of the element? the molecule is more reactive, the molecule is less reactive,there is no effect on reactivity,the molecule is completely unreactive?

2007-10-18 13:21:09 · 2 answers · asked by lilbutterfly555 1 in Chemistry

i am in the sixth grade and i have to do like a mental model cell project witch means i have to like make a city and have the cell wall and riboseomess and everthing but it cant be a city and i dont what to do!!!HELPPP plaease !

2007-10-18 13:21:08 · 1 answers · asked by Anonymous in Biology

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