Science & Mathematics - 8 December 2007

(just sumthin u need to know..)

2007-12-08 07:24:27 · 6 answers · asked by Anonymous in Zoology

An airplane taking off from a runway travels 3600 feet before lifting off. If it starts from rest, moves with constant acceleration, and makes the run in 30 seconds, with what speed does it lift off?

2007-12-08 07:23:59 · 4 answers · asked by mr_fic89 1 in Mathematics

2007-12-08 07:23:20 · 3 answers · asked by LEONARD D 1 in Other - Science

Okay I was outside hanging christmas lights and I felt something on my arm. It felt similar to a fly but heavier so I figured it was just a big fly. So I kinda shook my arm and when it didn't fly away I looked at my arm and saw this GIANT black ant with a huge pointy but. It was definitly either an ant or ant related because it was shaped just like an ant. No wings. It's butt was big and kindy pointy. It was black it may have had yellow stripes on it's butt, but I'm not sure i only saw it for a second before i freaked out and flicked it off and ran in the house! It was at least 3/4 of an inch long I would guess more around an inch or more though.

2007-12-08 07:22:23 · 5 answers · asked by Anonymous in Zoology

The annual cost of production of a ton of a chemical is given by the following formula, where x is the number of tons per year produced.

Cost per ton = 1,000,000 / x + 100 + x

can you find the value of x for which the cost per ton is a minimum, and the cost per ton for this value of x.

2007-12-08 07:22:11 · 2 answers · asked by mg© - anti VT™ MG AM© Fundi4Life 6 in Mathematics

2007-12-08 07:21:20 · 4 answers · asked by Anonymous in Chemistry

2007-12-08 07:14:23 · 5 answers · asked by Anonymous in Botany

My stepson wants to make a simple battery listed at miniscience.com. They sell the kit for $25 plus $10 shipping. I can find most of the parts at a hardware store, but I'm not sure if they will have the magnesium and iron electrodes. Is that something I could find there or at Radio Shack or somewhere else?

2007-12-08 07:14:12 · 0 answers · asked by blue_prince_of_dallas 2 in Other - Science

2007-12-08 07:11:51 · 5 answers · asked by !BOMB! 1 in Mathematics

2007-12-08 07:11:24 · 6 answers · asked by In Testimony Whereof 3 in Mathematics

If semen is left in a condom for many weeks, could it turn funny and cause illness ?

2007-12-08 07:11:21 · 7 answers · asked by Anonymous in Medicine

2007-12-08 07:10:03 · 11 answers · asked by xbabysashx111 1 in Physics

then what is on the other side? Another universe? My mother in law?

2007-12-08 07:07:34 · 14 answers · asked by Neomaxizoomedweebie 3 in Astronomy & Space

2007-12-08 07:02:06 · 9 answers · asked by Anonymous in Biology

How do I do this?!

2007-12-08 06:55:01 · 5 answers · asked by immagirlinvegas 1 in Mathematics

Consider the reaction:

2HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2H2O(l) ΔH = -118 kJ

Calculate the heat when 100.0 mL of 0.449 M HCl is mixed with 300.0 mL of 0.164 M Ba(OH)2.

How many kJ of heat is evolved?

2007-12-08 06:54:33 · 1 answers · asked by Anonymous in Chemistry

My teacher gave the entire class a huge packet to complete because the class did bad on the test (I did well). I dont have enough time to finish this and all of my other HW, can you do some of the following.
State whether the critical point is maximum, minimum, or point of inflection

1. y= x^2 - 6x +1; x=3
2. x^2 - 2x -6; x=1
3. x^4 +3x^2-5;x=0
4.x^5-2x^3-2x^2;x=0
5.x^3+x^2-x;x=-1
6.2x^3+4; x=0

if you can do atleast one of them that would be good. I still have more HW to finish before the fight (Mayweather Hatton)

2007-12-08 06:51:00 · 2 answers · asked by PTK 5 in Mathematics

2007-12-08 06:47:49 · 7 answers · asked by elmo 1 in Zoology

What is the molarity of K+ ions that a solution of 3.49M of K2SO3 will have?


many thanks!!!

2007-12-08 06:46:50 · 2 answers · asked by Hey D 1 in Chemistry

2007-12-08 06:46:49 · 5 answers · asked by RandomGirl 2 in Chemistry

And if there a set time how can that time be calculated?

2007-12-08 06:46:42 · 3 answers · asked by Anonymous in Physics

e.g. at 280nm alanine is absorbing 0.160 of light, the path length is 1cm i used 0.1mM of alanine.
Any help would be priceless thanx

2007-12-08 06:46:00 · 1 answers · asked by Hulk 1 in Chemistry

I want to make my own really cheap stuff that won't freeze, how do you do this. I don't have to keep buying it every couple days or buying alot at a time which is also a hassel

2007-12-08 06:42:51 · 2 answers · asked by Anonymous in Weather

Science question for a final study guide. A 1kg car will accelerate (faster, slower, the same) as a 2 kg car when rolling down a frictionless ramp.
I thought it was the same but am not sure.

2007-12-08 06:41:10 · 5 answers · asked by onlyhope117 1 in Physics

i want to plan a trip to the best place in the world to look at the stars!

2007-12-08 06:37:22 · 5 answers · asked by o0♥0o 1 in Astronomy & Space

cobalt-60 is a beta emitter with a half-live of 5.3 years. Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 26.5 years?

1. 1/5
2. 1/16
3. 1/26
4. 1/32
5. 1/64

2007-12-08 06:34:55 · 2 answers · asked by Kak D 1 in Chemistry

The sun is exerting a gravitational pull on the huge mass of the earth and keeps it in its orbit . We are moving freely on the surface of the earth and we are not tied to the earth firmly.How is it that the gravity of the Sun that pulls all the planets and keeps them in orbit around itself , is not pulling us apart from the earth into itself ? The gravitaional pull of the earth on us cannot be greater than that of the Sun on the earth or on us on the earth.If the pull of the Sun is weak on us on account of the distance of the sun from us , then that weak gravity would certainly, be not able to keep the earth on its orbit. So what is it that is keeping us on the earth without being pulled away by the Sun?

2007-12-08 06:33:44 · 20 answers · asked by Infinity 7 in Astronomy & Space

Hi,

I am working with a group of people on a physics project based on projectile motion. Our task is to build a ping pong launcher that will launch ping pongs into a bin 3.5 to 4.5 meters away from a line. The launcher must be behind this line. Furthermore, the ball can only be launched at a maximum of 30 cm above ground level. Do you have any suggestions that can help us construct our project?

2007-12-08 06:32:54 · 2 answers · asked by moosaur 2 in Physics

I'm in meteorology class in high school and we have to plot isobars on a weather map in terms of inches of mercury (ALT). How do I go about plotting these isobars? I know that you draw lines that are .08 apart. Please help!

2007-12-08 06:29:17 · 4 answers · asked by Mike B 1 in Weather

u kno like when all the continents were mushed together like a billion yrs ago.

2007-12-08 06:28:49 · 12 answers · asked by line writer 3 in Earth Sciences & Geology