Science & Mathematics - 16 December 2007

2007-12-16 14:06:17 · 3 answers · asked by Darnell J 1 in Mathematics

four climbers have tied themselves together with rope.
They march uphill (20 degrees) with an accel of 1.3 m/s2.
The three climbers behind the leader don't climb at all dragging with a coefficient of .11. the leader does all the climbing.
Find the tension between each rope and the force that that leader applies if their weights are as follows.
Leader 6kg
next 2kg
next 12kg
last 4kg

I dont even know where to start. help me please?

2007-12-16 14:06:05 · 2 answers · asked by Anonymous in Physics

4x^2 + 9y^2 - 8x + 36y + 4 = 0
I know I have to move the 4 over
4x^2 + 9y^2 - 8x + 36y = -4
And then factor:
4(x^2 - 2x) + 9(y^2 + 4y) = -4
and find (-2/2)^2 & (4/2)^2 = 1 & 4 (add to left side and 4 & 36 to the right).

Where do I go from here and how to I find the center, foci, major & minor axis?

I really appreciate ANY help.
Thank you very much and Merry Christmas!

2007-12-16 14:01:29 · 3 answers · asked by Anonymous in Mathematics

2007-12-16 13:57:23 · 6 answers · asked by Anonymous in Mathematics

when a earthquake erupts, is it possible to trigger a volcano eruption?

2007-12-16 13:57:10 · 4 answers · asked by JakeSteel 2 in Earth Sciences & Geology

Mitch tossed an apple to Kathy, who was on a balcony 29.4 m above him. The initial speed of the toss was 24.5 m/s. Kathy missed the apple on its way up, but she caught it on its way down. Which of the times represents how long the apple was in the air? h = rt � 4.9t�


answer options:



1 s.

2 s.

3 s.

5 s.

2007-12-16 13:56:22 · 4 answers · asked by Lola L 1 in Mathematics

If the time of observation is midnight, and a planet is at 45 degrees E, what time does it set?

how about if a planet is at western quadrature, when does it rise?

dont answer if u dont know, i need help with it so dont waste yours and my time.

2007-12-16 13:53:48 · 3 answers · asked by ted 1 in Astronomy & Space

I have heard that it is the elephant, but what about the hippo?

2007-12-16 13:53:47 · 8 answers · asked by Sidney. 2 in Zoology

2007-12-16 13:51:45 · 2 answers · asked by dantistryfiliya 2 in Medicine

2007-12-16 13:51:31 · 1 answers · asked by Anonymous in Mathematics

Ok, here's my question. I have curly hair, but until i was about 10 i had stick straight hair. My mom has straight hair, and my dad has wavy.... but that's not the point... anyways, i don't understand how i had striaght hair and all of a sudden it curled... its not even like wavy, its COMPLETELY CURLY!
does it have anything to do w/ the crossing-over of chromosomes during meiosis?

2007-12-16 13:51:05 · 7 answers · asked by howaboutthat2224 3 in Biology

Imagine that you are watching a science fiction movie. A starship is disabled in an attack. After the transfer of the crew to the alien ship, the alien invaders begin to change the atmosphere inside the ship to meet their biological requirements. As they do so, the ship's hull suddenly and unexpectedly gives way and the ship "explodes." In terms of air pressure, explain why this might have happened.

2007-12-16 13:50:57 · 7 answers · asked by ? 2 in Astronomy & Space

So I was trying to use the derivative of y=3x^2, which is y'=6x. Plug x=2 into that so the slope at x=2 is 12. I actually have no clue if that's right or not. Anyway, I'm pretty clueless after that anyway... thanks for the help in advance.

2007-12-16 13:50:39 · 1 answers · asked by ¿ /\/ 馬 ? 7 in Mathematics

1. describe the physical environment (temp, humidity, light, exposure to water and wind erosion) a few days after a forest fire in an area where the fire has burned the vegetation, but left the soil intact

2. how will pioneer plants change the physical environment during the first stage of successsion so that the pioneer plant species are eventually erplaced by other species?

3. would the situation described above be an example of primary or secondary succession?

4. predict how the forset fire will affect species diversity in this area over next 100 years?

2007-12-16 13:50:32 · 2 answers · asked by lovereallythere 1 in Earth Sciences & Geology

for example this problem sin pi/4

2007-12-16 13:49:40 · 4 answers · asked by irockmypoloshirt06 2 in Other - Science

2007-12-16 13:47:33 · 6 answers · asked by peacelovedazzle 1 in Engineering

Ok....

I found a few rocks a couple years ago....

When I found them they were on top[ of a pile of dirt and there was a couple inches of snow in the ground....the snow where the rocks were had melted....and when i picked them up they were warm to the touch

They are a metalic blue in color (but I have since found red and purple ones as well)

Anybody have any sorta idea what kind of rock they are?

2007-12-16 13:46:55 · 1 answers · asked by supermanpj4444 2 in Earth Sciences & Geology

The bottom and top of a box are rectangles twice as long as they are wide. Find the volume of the box if it is 4 ft high and has a total surface area of 220 ft^2. Which equation can you use to solve this problem?


4w^2 + 8w = 220

4w^2 –16w = 220

4w^2 + 24w = 220

4w^2 –24w = 220

2007-12-16 13:43:26 · 5 answers · asked by Lola L 1 in Mathematics

A rectangular garden 30 m by 40 m has two paths of equal width crossing through it as shown. Which of the following widths must each path measure if the total area covered by the paths is 325 m^2

2007-12-16 13:42:16 · 2 answers · asked by Lola L 1 in Mathematics

ALL OF THE FOLLOWING ARE TRUE STATEMENTS EXCEPT ______.

[A] (-5)^2 = 25
[B] the converse is false
[C] the converse is true
[D] the statement is false

2007-12-16 13:40:23 · 2 answers · asked by Chico 2 in Mathematics

2007-12-16 13:40:11 · 4 answers · asked by beautiful.light 1 in Mathematics

2007-12-16 13:39:18 · 2 answers · asked by swelwynemma 7 in Biology

2007-12-16 13:38:43 · 3 answers · asked by Mercury 2010 7 in Medicine

I was just thinking up some Science Fiction scenarios and this came to mind.

2007-12-16 13:37:45 · 12 answers · asked by anim_8_er 1 in Astronomy & Space

I have an extra credit problem on my science homework and I kind of need the 5 points so please help me.

2007-12-16 13:31:31 · 7 answers · asked by tictic242 2 in Astronomy & Space

Say I want to crete a sort of spiral of space-time or a time funnel/spiral [whatever you want to call it]. Or just warp space so it's bigger in front of you and smaller behind you .This would cause near instantaneous travel over many light years. But it would be difficult getting it to stabalize and have all your atoms put in the right place.

2007-12-16 13:30:52 · 7 answers · asked by Noe V 1 in Physics

the return trip against the same current took 4 hours. find the speed of the boat in still water

2007-12-16 13:26:43 · 1 answers · asked by Anonymous in Physics

I've heard of a bird that make sound like a ghost sound , very deep but i wanna know the name of the bird , anyone know ? was shock when i was the first time who hear this sound..

2007-12-16 13:24:02 · 12 answers · asked by Anonymous in Zoology

i need to know what kind of ant it is , it's large but died so soon ,there is a female jumping spider beside which is ready to lay eggs too,here's the picture , please identify:

http://www.putfile.com/pic.php?img=7301421

2007-12-16 13:21:44 · 3 answers · asked by Anonymous in Zoology

it isnt a right triangle.

2007-12-16 13:21:28 · 4 answers · asked by deadly scythe 1 in Physics