Science & Mathematics - 17 September 2007

Both of them will eventually reach same terminal velocity v = 75 m/s.

What will be eventual vertiacal separation of the balls?

2007-09-17 10:26:01 · 2 answers · asked by Alexander 6 in Physics

2007-09-17 10:25:25 · 1 answers · asked by alexis g 1 in Chemistry

explain please with a cherry on the top

2007-09-17 10:23:47 · 11 answers · asked by hellokittycutie1199 2 in Mathematics

what is the derivative of (1/x)?

2007-09-17 10:16:35 · 9 answers · asked by Anonymous in Mathematics

2007-09-17 10:15:19 · 5 answers · asked by Anonymous in Chemistry

2007-09-17 10:14:04 · 4 answers · asked by Anonymous in Engineering

What role does gravity play into these circumstances? Does mass? (if so, how much would something have to weigh in order to achieve this). Any other forces? Do all these animals have specially designed feet? Please answer seriously if you know the answer.

2007-09-17 10:12:27 · 4 answers · asked by Anonymous in Physics

has anyone seen this before?????

http://www.forteantimes.com/strangedays/cryptozoology/546/dartmoor_mystery_

here's another mysterious creature:

http://www.local10.com/family/13632602/detail.html


cat grows wings

http://www.ananova.com/news/story/sm_2344838.html?menu=

2007-09-17 10:11:54 · 3 answers · asked by Justin Kalkimer 3 in Zoology

please help. My substatute teacher keeps giving the class questions that she hasn't even teached us to do yet. Please help!

Solve:
1) x-2x=-8
2)6x squared-x-2=0
3)9x squared-9x-28=0
4)6x squared+x-2=0
5)4x squared-9=0

Please Help ASAP!!!

2007-09-17 10:11:48 · 7 answers · asked by Anonymous in Mathematics

What imaginary line passes through Alaska?I need it for my home work please can naybody tell me u can look on a globe but i looked but i did not see it becasue it is imaginary so i was like duh.so can somebody help me please.

2007-09-17 10:10:59 · 6 answers · asked by cc 1 in Earth Sciences & Geology

Lets say that you dug a hole in the ground (mountains) that was about 10 feet deep. could you put an object in here, and then somehow surround it with glass? Like, would you use layer after layer of sand heated up with fire? Or what? How would this be done exactly?

2007-09-17 10:10:56 · 8 answers · asked by Bello Stella 4 in Earth Sciences & Geology

How much more crust do you get with a medium pizza with a diameter of 12 inches than a small pizza with a diameter of 10 inches?

2007-09-17 10:09:19 · 12 answers · asked by Anonymous in Mathematics

I'm confused!!!
http://s223.photobucket.com/albums/dd78/floodtl/?action=view¤t=JAck-1.jpg

2007-09-17 10:07:23 · 6 answers · asked by Anonymous in Physics

x2-2x-80? Please help! lol

2007-09-17 10:05:47 · 10 answers · asked by Anonymous in Mathematics

2007-09-17 10:04:21 · 3 answers · asked by Anonymous in Other - Science

A car can go from 0 to 60 in 3 seconds, how long would it take for the car to go from 0 to 3 mi/h?




Thanks for your help it is VERY much appreciated:)

2007-09-17 10:03:54 · 3 answers · asked by Natlsn12009 1 in Mathematics

im not sure if pluto is a planet or not??

2007-09-17 10:03:08 · 9 answers · asked by Anonymous in Astronomy & Space

A worker drops a wrench from the top of a tower 57.0 m tall. With what velocity does the wrench strike the ground?

2007-09-17 10:02:50 · 3 answers · asked by Anonymous in Physics

the acceleration of a particle is directly proportional to the time t.at t =0 velocity =400mm/s.
knowing that at t=1 velocity =370mm/s and distance = 500mm
determine the velocity, the position and the total distance traveled when t = 7s

im not sure if what i have done is correct, i got -60 as the constant which gave velocity at 7s = -1070

can anyone please help?

2007-09-17 10:00:45 · 1 answers · asked by Anonymous in Physics

2007-09-17 10:00:00 · 4 answers · asked by Anonymous in Earth Sciences & Geology

help me out please .

2007-09-17 09:59:19 · 4 answers · asked by she_crazy123 1 in Mathematics

alright it says:

Tell whether the system has no solution or infinitely many solutions.

1) y=-2x+1 and y=-2x-3

2) x+2y=10 and 2x+4y=10

3) y=3x+4 and -12x+4y=16

4) y=2x+6 and 4x-2y=8

2007-09-17 09:55:29 · 3 answers · asked by Anonymous in Mathematics

I need some quick help to a physics problem.

1) A car is moving at a constant velocity to the right

There is the force of air resistance and the force of the road on the car. (as well as gravity and normal force).

My question is...would the force air and force road be equal because the velocity is constant?


2) If the car is speeding up would the force from the road be greater or less than the force of air resistance?

(it doesn't mention friction in this problem but I'm assuming that's factored into the force of the road pushing back on the car and the spinning of the tires, engine etc)

And then if it's slowing down, same question-- which force would be greater: the force of the road or the force due to air resistance?


Thanks so much to all who answer!
I will be sure to choose a Best Answer!

2007-09-17 09:51:59 · 3 answers · asked by Anonymous in Physics

Hi,

if there was a space station and its mass is 2.09x10^4 kg and it orbits the Earth with a height of 350km. The radius of the Earth is 6400km. How would I be able to work out the angular displacement (in radians) after 1 hour?

I've already worked out the centripetal force on the space station, its orbital speed and the time taken for each orbit but not quite sure how I can use these to calculate this last question. Please advise. Many thanks.

2007-09-17 09:51:33 · 1 answers · asked by Anonymous in Physics

Do I have these properly named?

BF3 = boron trifluoride
AgCl = Gold (I) Chloride
PbBr4 = Lead (iv) bromide

2007-09-17 09:49:23 · 3 answers · asked by mikala m 2 in Chemistry

by that I mean Earth and the rest of the solar system?

2007-09-17 09:48:56 · 6 answers · asked by howard f 1 in Astronomy & Space

2007-09-17 09:44:47 · 7 answers · asked by Lady j 1 in Mathematics

I have misidentified what I previously thought to be hamster burial grounds.. Sorry.

2007-09-17 09:41:28 · 4 answers · asked by ? 2 in Zoology

2007-09-17 09:40:51 · 1 answers · asked by Anonymous in Physics

An airplane is flying at 150 mi/hr (its speed in still air) in a direction such that a wind of 60 mi/hr blowing east to west, the airplane travels in a straight line southward....

what must the plane's heading direction for it to fly diredtly south?...

how do you do this?... i thought that i could add the Vector of the plane relative to the earth with the Vector of the wind relative to the earth to get the resultant, answer... but don't i need at least one angle to do that? or am i over thinking it and there is an easier way to figure this out... please help
thank you...

2007-09-17 09:40:46 · 2 answers · asked by hidden_within_a_nightmare 3 in Physics