Science & Mathematics - 31 October 2006

2006-10-31 06:47:39 · 2 answers · asked by Anonymous in Biology

2006-10-31 06:44:32 · 2 answers · asked by zach32 2 in Mathematics

Is 6000v dangerous to humans? If not-is it even harmful to us? Whats a good voltage to inflict pain but not too much pain?
no silly answers please. thank u!!

2006-10-31 06:43:39 · 7 answers · asked by ? 2 in Engineering

torque produced by a 4.0 N force applied to a door at a perpendicular distance of 0.46 m from the hinge (in units of N . m)

2006-10-31 06:42:14 · 4 answers · asked by Dee 4 in Physics

20 0ver 10, divided into 20 0ver ten?

2006-10-31 06:41:35 · 4 answers · asked by BOT22 1 in Physics

help please

2006-10-31 06:40:28 · 9 answers · asked by Anonymous in Biology

I am having trouble understanding this concept. I have a sphere with the equation (x-1)^2 + (y+2)^2 + (z-4)^2 = 16

1. equation of reflectance about the x,y plane
2. equation of reflectance about the point (2,1,-2)

Thoughts.
1. My general idea upon resolving this is that since it is about a plane where z is consistant (x,y,0) then the equation for the reflectance will just be (x,y,z) = (u,v,-w)

In turn this will give us the equation of
(x-1)^2 + (y+2)^2 + (z+4)^2 = 16

Since the x and y should be the same and the radius has to be the same, its just the z that is in the opposite side of the plane.

2. Now about a point, i am even more lost here.

Thoughts, i know that the point (2,1,-2) is the mid point between the 2 sphere equations, it is not as basic as the plane question because we are shifting all 3 variables about a point. I know the radius is still going to be 4, just not sure how to relate this point to get the equation of reflectance.

Thanks,

2006-10-31 06:39:21 · 2 answers · asked by Anonymous in Mathematics

Can every ratio be written as the ratio of some number to 1?Why or why not?

2006-10-31 06:39:02 · 6 answers · asked by Pammie 3 in Mathematics

I have other questions that I will name all of them here about the wonders of the world...

1. In South Africa a tree called Jacaranda blooms mauve flowers... can I buy one in the states and will it grow in Dallas?

2. The Great Wall of China is one of the wonders of the world. It winds east to west for about 4,000 miles... How far is 4,000 in the states? From Alaska to Miami maybe?

3. What's so special about the Taj Mahal (one of the wonders of the world)?

4. What's the bridge called that takes you to downtown Sydney, Australia and overlooks The Sydney Opera House? And where can I find a gorgeous Australian man to marry?!?!?!

5. How big is one Canadian glacier?

6. These are just for fun, and I really don't need the answers, but if anyone knows feel free.... HAPPY HALLOWEENY!

2006-10-31 06:38:17 · 4 answers · asked by theskyisthelimit02 3 in Geography

2006-10-31 06:37:52 · 7 answers · asked by Dom K 1 in Botany

n,5,square root of 2.56,square root of 5

2006-10-31 06:37:36 · 6 answers · asked by Olaniyi s 1 in Mathematics

2006-10-31 06:37:26 · 1 answers · asked by naurinbutt 1 in Engineering

I know it's 1/(2squareroot(x)).
But how do I show that using the limit theorem?
Like with x^2: lim h->o ((x+h)^2 - x^2)/h
= (x^2 + h^2 + 2xh - x^2)/h
= (h^2 + 2xh)/h
=h + 2xh
=2x

I'm completely stumped by the square root aspect considering the power is 1/2, not 2, or 3.

Help!

2006-10-31 06:34:40 · 5 answers · asked by velmakelly777 1 in Mathematics

2006-10-31 06:34:29 · 23 answers · asked by david_1873_rfc 1 in Geography

2006-10-31 06:33:18 · 6 answers · asked by hany s 2 in Physics

Its everywhere from doorknobs to cars(after driving),hair, shirts... its not like that during spring and summer.

2006-10-31 06:30:48 · 6 answers · asked by Keepingmycool 5 in Other - Science

2006-10-31 06:30:39 · 9 answers · asked by Clifford E B 1 in Mathematics

2006-10-31 06:24:06 · 6 answers · asked by goring 6 in Physics

Its a long legged flying thing, that the women in my family, and some of the men, hate...... what is it really?

2006-10-31 06:23:52 · 11 answers · asked by Andrew G 2 in Zoology

a special airport truck is used to push a heavy airliner away from the terminal. the truck pushes with a force of 2000 lb for a distance of 150 ft. the mechanical work done by the truck is ______. (circle the best answer)

a. 30,000 ft(lb)
b. 300,000 ft/lb
c. 300,000 ft(lb)
d. 30,000 ft/lb

2006-10-31 06:23:46 · 4 answers · asked by Anonymous in Mathematics

2006-10-31 06:22:54 · 7 answers · asked by John Doe 1 in Chemistry

2006-10-31 06:22:14 · 6 answers · asked by kundu_gupta 1 in Biology

2006-10-31 06:21:06 · 5 answers · asked by goring 6 in Physics

HF+Mg
2HF+Mg---->MgF2+H2?
hydrogen fluroide + magnesium------> salt and water
P+Cl2----> PC13
2P+3Cl2-----> 2PCl3?

2006-10-31 06:20:38 · 2 answers · asked by ghettoco 1 in Chemistry

2006-10-31 06:20:32 · 5 answers · asked by goring 6 in Astronomy & Space

In the animal world, there are animals that thrive by night, (nocturnal) or by day (diurnal). It is their nature and I would surmise it is a genetically induced characteristic.

Is the same applicable to human beings and if so, is it purely psychologically induced, or is it physical / genetic in origin, as well?

I'll use myself as an example. For as long as I can remember, I have always felt the sharpest mentally, and the most energetic, physically, between 3:00 pm and midnight. I'm somewhere in between diurnal and nocturnal. (By the way, is there a term for this?)

2006-10-31 06:20:23 · 6 answers · asked by Anonymous in Biology

(A) The distance between repeating points of a wave pattern?
(B) The distance between peak and trough?
(C) The distance between points of the wave crossing the line of zero disturbance?
(D) The physical length of a sine wave if measured in a straight line?

2006-10-31 06:17:32 · 7 answers · asked by Anonymous in Physics

2006-10-31 06:15:59 · 8 answers · asked by ♥ mars♥ 4 in Mathematics

2006-10-31 06:14:40 · 6 answers · asked by Anonymous in Biology

2006-10-31 06:13:49 · 14 answers · asked by chris p 1 in Mathematics