Science & Mathematics - 8 December 2006

During a tug-of-war, team A pulls on team B by applying a force of 2830 N to the rope between them. How much work does team A do if they pull team B toward them a distance of 3.45 m?

2006-12-08 15:28:06 · 5 answers · asked by ????????????????? 2 in Earth Sciences & Geology

A 85.5-kg skier rides a 3090-m-long lift to the top of a mountain. The lift makes an angle of 17.7 ° with the horizontal. What is the change in the skier's gravitational potential energy?

2006-12-08 15:26:19 · 1 answers · asked by ????????????????? 2 in Earth Sciences & Geology

Can someone please explain me what exactly is meristem and the way they are used in layering and grafting plant technique?

the only thing i can think off is that meristem undergo mitosis repeatedly.

Please provide me your guidance

2006-12-08 15:24:01 · 3 answers · asked by Anonymous in Biology

Hey... I have a few questions.... I am really into rockets... any ideas as to what I can use for like explosives for them.... like I know how then work and all but like a powder or something.... Any ideas??

2006-12-08 15:23:27 · 2 answers · asked by Andrew R 1 in Physics

This equality holds true for every value. Can you prove this identity?
d/dx |x| = |x|/x = x/|x|

...

2006-12-08 15:22:13 · 3 answers · asked by kevin! 5 in Mathematics

It seems to me that the blue light cones are heading your way, cos you see them, and so were the high velocity particles.

2006-12-08 15:17:47 · 6 answers · asked by Anonymous in Physics

please do not respond if you don't know the answer.

2006-12-08 15:13:42 · 1 answers · asked by mel_sue_2000 1 in Biology

What formula was used. Pls explain to me how to get the ratio...

2006-12-08 15:13:41 · 1 answers · asked by Krissy 1 in Chemistry

If you have chilled pressure at 10psi. @ 50degrees when it switches to heating it jumps up to 40psi. after it climbs to 180degrees. The expansion tank is ok. ?

2006-12-08 15:13:35 · 2 answers · asked by pipemaster 2 in Engineering

random wuestion.. i wanted to see if you guys could explain this a little better than my teacher :)

2006-12-08 15:12:09 · 5 answers · asked by highschoolchild 1 in Chemistry

the swine sex-determining gene on the Y chromosome

2006-12-08 15:11:30 · 2 answers · asked by alma v 1 in Biology

Okay... instead of that other one I listed... lets try the simpler one...

and the hint for this one is: Since S is a subspace, s + P_S x is again in S, for all s, as is cs, for every scalar c.

I know it's something simple that i'm not understanding... and it's frustrating me.

2006-12-08 15:10:49 · 2 answers · asked by Anonymous in Mathematics

i think is hereditary cause it happens to my dad but what i wanna know is what causes it to happen.

2006-12-08 15:10:11 · 3 answers · asked by Anonymous in Biology

I know the difference between a solid and dotted line (when graphing linear inequalities); in my text book it states that if the graph has a dotted line, the points on the line are NOT part of the solution of the inequality. My question is, if the line on the graph is solid; can the points on the line be a solution to the inequality?

2006-12-08 15:09:34 · 4 answers · asked by glitteringfairywings 2 in Mathematics

Given the sequence [dⁿ/dxⁿ b^x], where b is a real number, find the limit of the sequence as n approaches infinity.

^_^

2006-12-08 15:03:44 · 2 answers · asked by kevin! 5 in Mathematics

1.meters
2.centimeters
3.millimeters
4.quarts
5.pint
6.miles

2006-12-08 14:57:49 · 7 answers · asked by Anonymous in Mathematics

show work plz

1. Express cot²x-1/csc²x in terms of sin x.


2. Reduce (csc²x-sec²x) to an expression containing only tan x.


3. Verify the following identities.
a. (sin B + cos B) (sin B – cos B) = 2 sin² B -1
b.(1 – cos² y + sin² y)² +4 sin² y cos² y=4 sin² y
c. tan² 0 sec² 0- sec² 0+1 = tan 0
d. sin 0/csc 0 + cos 0/ sec 0 =1
e. sin x tan ² x cot ^3 x=cos x
f. sec² x/sec ² x-1 =csc² x

2006-12-08 14:57:12 · 3 answers · asked by hurry 1 in Mathematics

physics

2006-12-08 14:54:48 · 8 answers · asked by Anonymous in Physics

Alright, let say a planet was 35 light years away, and i build a " machine " which let's me be in the planet in a blink . Is this Teleportation? Time traveling? or what?

2006-12-08 14:53:52 · 5 answers · asked by Anonymous in Physics

John Bier determines that the slope of the line representing the absorbance of a solution of Red 3 at its analytical wavelength as a function of concentration(in mg/L) is .066 L/mg.

He measures the absorbance at the same wavelength of a solution of Red 3 of unknown concentration in the same cuvette and finds the absorbance 0.27.

What is the concentration of Red 3 in the unknown solution?

I got an answer, but i am not sure.
May someone get a better way to solve the question...i used Beer's Law : A= εbc

Pls,not only answers,clearly explanation...thanx

2006-12-08 14:53:32 · 3 answers · asked by Tommy 2 in Chemistry

How close are humans from time traveling?, in the past few years, i have read and seen many scientists and others working on this and talking about it more. We all know is possible, but just not yet. Will it be on this century?

2006-12-08 14:53:11 · 8 answers · asked by Anonymous in Physics

physics

2006-12-08 14:53:03 · 2 answers · asked by Anonymous in Mathematics

2006-12-08 14:49:28 · 6 answers · asked by Anonymous in Zoology

2006-12-08 14:45:30 · 12 answers · asked by wilbur2lot 3 in Zoology

How is that even possible? Is this a "How does God not have a beginning?" type of question that no one can answer?

2006-12-08 14:43:44 · 8 answers · asked by Anonymous in Earth Sciences & Geology

If you could travel at very high speeds through space wouldn't there be a problem with running into debris and rocks?

2006-12-08 14:43:06 · 9 answers · asked by Anonymous in Astronomy & Space

2006-12-08 14:42:28 · 15 answers · asked by Anonymous in Astronomy & Space

(i wanna se how many people answer, rocks in our solar system : P) oh oh, ignore that

2006-12-08 14:40:00 · 8 answers · asked by Poseidon 2 in Astronomy & Space

Do particles at absolute zero degrees(-273 C) vibrate?

2006-12-08 14:39:37 · 17 answers · asked by formystudies3 1 in Physics

I have to conduct an experiment about the paper chromatography . . . but one of the materials that is needed is the Paper Coffee Filters.
But I have no Paper Coffee Filters that I can use for this experiment.
What are the possible alternatives for this material so I have the same result if I am going to use Paper Coffee Filters?

Are tissues alright?

2006-12-08 14:39:23 · 4 answers · asked by ~§~ 3 in Chemistry