Science & Mathematics - 20 December 2007

to harvest transplantable human organs?

2007-12-20 12:29:36 · 2 answers · asked by Anonymous in Biology

hi. i really need help with a couple of problems. i can't seem to figure these out at all.

okay, here's the first one:

Two charges, -14 and +4.4 µC, are fixed in place on the x axis at x = 3.0 m and x = 0 m, respectively.

(a) At what spot along the x axis is the net electric field zero?

(b) What would be the force on a charge of +15 µC placed at this spot?


the other question is:

A tiny ball (mass = 0.014 kg) carries a charge of -22 µC. What electric field (magnitude and direction) is needed to cause the ball to float above the ground?





If you could help me with either of those problems or both, it would be really helpful. thanks.

2007-12-20 12:28:35 · 1 answers · asked by chicagolakers 2 in Physics

I think it is possible NASA creating the moon landing on a Hollywood set. Check out this website and let me know your thoughts.
http://www.ufos-aliens.co.uk/cosmicapollo.html

2007-12-20 12:28:32 · 14 answers · asked by Mike F 2 in Astronomy & Space

DOG question, could you be of any help?

2007-12-20 12:27:46 · 3 answers · asked by Anonymous in Physics

2007-12-20 12:26:47 · 5 answers · asked by Mary R 1 in Weather

2007-12-20 12:25:43 · 2 answers · asked by LIVI 4 in Astronomy & Space

can any one tell me a small plant ican buy that grows well in winter? this is for my science project, i am in 7th grade

2007-12-20 12:09:25 · 2 answers · asked by Anonymous in Other - Science

i need it for a essay in science

2007-12-20 12:08:49 · 9 answers · asked by Jessica Anne 3 in Other - Science

2007-12-20 12:06:38 · 12 answers · asked by SeE G 1 in Astronomy & Space

pictures may be helpful if your explaining to me having to draw it out and see for myself.
or a good worded explanation w/o me having to mentally or physically picture something. this would be way better because i need to do homework explaining this.

2007-12-20 12:04:33 · 3 answers · asked by . 1 in Mathematics

(x+a)^n=∑_(k=0)^n [(n¦k) x^k a^(n-k)]

I have NO idea. You guys?

2007-12-20 12:04:32 · 5 answers · asked by lightriderangel 2 in Mathematics

2007-12-20 12:04:27 · 13 answers · asked by Addy 1 in Weather

A mini black hole traveling near light speed hits the earth and pass right through. Because of its speed, the only matter it eats is matter directly in front of its path. Assuming it converts 50% of the matter it consumes directly into energy. And it has a frontal area of 10 cm^2. How big of a blast will it create just going through the atmosphere before it hits the earth?

[I recently messed up on a similar question ;-)]

2007-12-20 12:02:42 · 4 answers · asked by Frst Grade Rocks! Ω 7 in Physics

2007-12-20 12:02:37 · 6 answers · asked by kitty6004 1 in Biology

please help me get it right!!!


Question 1: An m2 = 1.4 kg can of soup is thrown upward with a velocity of v2 = 5.2 m/s. It is immediately struck from the side by an m1= 0.5 kg rock traveling at v1= 8.2 m/s. The rock ricochets off at an angle of α = 65 degrees with a velocity of v3= 5.4 m/s. What is the angle of the can’s motion after the collision? Answer in units of degrees.

Question 2: With what speed does the can move immediately after the collision? Answer in units of m/s.

2007-12-20 12:00:04 · 1 answers · asked by Anonymous in Physics

This is a real math problem so don't say that the bus has no legs.

There are 7 girls on a bus
Each girl has 7 backpacks
In each backpack, there are 7 big cats
For every big cat there are 7 little cats

Question: How many legs are there on the bus?

2007-12-20 11:59:28 · 5 answers · asked by ? 3 in Mathematics

An idealized model of a river flowing around a rock considers a circular rock of radius 1 in the river, which flows across the xy-plane in the positive x-direction. A simple model begins with the potential function .z=x + (x/(x^2+y^2))

a.) Compute the velocity vector field, i.e. . v=grad z

b.) Show that the flow of v is tangent to the circle x^2 + y^2 =1 . This means that no water crosses the circle. The water on the outside must therefore all flow around the circle.

c.) Show that div v=0 . What is the meaning of this in the context of the problem?

2007-12-20 11:57:40 · 1 answers · asked by Andy 2 in Mathematics

2007-12-20 11:56:44 · 18 answers · asked by hidawallace 2 in Mathematics

ok this is the problem.....

change 11, 12, 0, 0, and 2 into a percent and decimal...
can u please turn all of that to a percent that is all out of 100
and please turn to a decimal too!!

Thank You so much!!!!!!!!!

2007-12-20 11:55:24 · 3 answers · asked by Teresa 3 in Mathematics

or is it like alcoholism...just day by day?

2007-12-20 11:54:30 · 5 answers · asked by S i r i 1 in Medicine

2007-12-20 11:53:22 · 3 answers · asked by azngirl62506 1 in Mathematics

obviously the its faster than the speed of sound but is it faster than the speed of light?

2007-12-20 11:52:34 · 7 answers · asked by ty ty 2 in Physics

2007-12-20 11:51:44 · 5 answers · asked by Anonymous in Physics

2007-12-20 11:51:11 · 5 answers · asked by Anonymous in Engineering

2007-12-20 11:50:15 · 5 answers · asked by give me TRUTH 3 in Astronomy & Space

Celsius temperature readings can be converted to fahrenheit readings by using the formula F= 9/5C + 32. What is the Fahrenheit temperatures that corresponds to each of the following Celsius temperatures: -10, 0, 15, 100.

2007-12-20 11:49:36 · 7 answers · asked by msmari1973 1 in Mathematics

anyone know?

2007-12-20 11:48:54 · 8 answers · asked by Anonymous in Mathematics

So, for math we're doing the math game 24. For those who don't know, it's a game where you need to use math in order to have 4 numbers reach 24(ex:9x3-2-1). In the standard rules you can only use addition, subtraction, multiplication, and division but if you can find other ways I'll accept those answers as well(ex: (6x4)(1^3)).

So, anyways my teacher asked if we could get all possibilities 1-9 with no repeats, here's the ones I got stuck on:
8 1 6 7
8 2 5 7
9 2 5 6
9 1 4 5
7 3 4 6
9 5 6 7
thanks.

2007-12-20 11:48:09 · 2 answers · asked by me 2 in Mathematics

okay. so for earth and environmental science I have to make a collage or pictures from magazines that looks like an Evergreen Coniferous Rain forest. I don't really know what it is like though... help me!!thanks!

2007-12-20 11:46:47 · 2 answers · asked by carol is in the box 3 in Botany

If no then why not? What's the difference?

The electrical setup is as follows: 3 Fuses in this order

20 amp --- 15 amp --- 15amp

2007-12-20 11:44:46 · 11 answers · asked by dieselg5 1 in Engineering