Science & Mathematics - 22 October 2007

2007-10-22 15:40:28 · 5 answers · asked by MKS 2 in Mathematics

2007-10-22 15:40:13 · 1 answers · asked by Anonymous in Chemistry

A=2(pi)(r^2)?

2007-10-22 15:38:49 · 5 answers · asked by Anonymous in Mathematics

This is a nonstandar problem

2007-10-22 15:35:31 · 2 answers · asked by Anonymous in Mathematics

2007-10-22 15:33:17 · 3 answers · asked by joseph 3 in Astronomy & Space

okay so i am a pta major and i am in anatomy and physiology right now and we are doing muscle contractions right now and i just DO NOT GET IT. so if anyone could explain it to me that would be wonderful...

this is what i have in the way of notes for it:
-motor nueron action potention
-acetylcholine release and binding (to motor end plate)
-action potential in sarcolemma
-calcium release from sarcoplasmic reticulum
-exposure of actin active sites
-binding with myosin cross bridges
-reset

i mean i kind of get it..like i know what the sarcolemma and the SR and myosin and actin is..
i dont really understand what action potential is though

any help at all would be GREATLY appreciated!!!!!!!!!

2007-10-22 15:29:15 · 1 answers · asked by Anonymous in Biology

I have two isotopes one Cl-37 and Cl-35 atomic unt is 35.45

and one part in the equation there (1-x) how do i get that ?

2007-10-22 15:28:38 · 3 answers · asked by Anonymous in Chemistry

Caitlin is playing tennis against a wall. She hits the tennis ball from a height of 0.5 m above the ground with a velocity of 20.0 m/s at an angle of 15.0° to the horizontal toward the wall that is 6.00 m away. a) How far off the ground is the ball when it hits the wall? b) Is the ball still traveling up or is it on its way down when it hits the wall?

2007-10-22 15:25:23 · 1 answers · asked by Anonymous in Physics

Was it by lightning?? I haven't heard the cause on the news at all and i was just curious>??

2007-10-22 15:24:13 · 9 answers · asked by carcar44324 1 in Weather

Weird question. I know.

Im pretty sure black mold can attach to aluminum and discolor it? Can it do this to stainless steel as well? If so, does it just discolor it or does it embed itself into it? Can it be cleaned? I think I might have some in a pan that I left out a little damp overnight.

2007-10-22 15:23:42 · 6 answers · asked by Anonymous in Other - Science

2007-10-22 15:21:15 · 1 answers · asked by chess_e4_pr 1 in Physics

please anser . i need it is a hour.

2007-10-22 15:21:09 · 2 answers · asked by yame 1 in Mathematics

2007-10-22 15:18:55 · 14 answers · asked by Anonymous in Astronomy & Space

consider a classroom 10 m long by 6 m wide by 4 m high at "room temp" 20 degrees celcius and 1 atmosphere. What is the mass of room air?if all air was replaced by helium what would be the weight of helium in the room?

2007-10-22 15:16:31 · 1 answers · asked by Anonymous in Physics

Now you do.

2007-10-22 15:14:03 · 2 answers · asked by jacquie 6 in Earth Sciences & Geology

from 1 to 3 million years to reach the level we are on right now. What is the possibility that some dinosaurs who ruled the planet for 300 million years didn't achieve the same thing and move on to another planet? Wouldn't it seem feasible that some dinos 'did' achieve sentience after all that time and move to somewhere else? Another planet, dimension, something?

2007-10-22 15:13:05 · 10 answers · asked by Anonymous in Astronomy & Space

2007-10-22 15:12:32 · 4 answers · asked by Anonymous in Biology

what color would i get if i pass light from a light bulb through a red filter and then through a green filter?

2007-10-22 15:08:50 · 7 answers · asked by Anonymous in Physics

2007-10-22 15:07:34 · 2 answers · asked by Rose R 1 in Chemistry

Which phase of Mitosis requires the greatest expenditure of energy?

I need sources so i can read up further and any help is greatly appreciated


I'm thinking Anaphase btw

2007-10-22 15:07:19 · 4 answers · asked by Jeff 2 in Biology

you are driving a car 50 miles per hour. a fly is sitting on your head.what is the speed of the fly if the reference point is your nose?
i need help with my science homework.

2007-10-22 15:06:02 · 6 answers · asked by nirvana 1 in Physics

For a school thing. What kind of houses to prcupines make for themselves. I think it a burrow. Am I right perhaps?

2007-10-22 15:03:51 · 5 answers · asked by Theophilus 1 in Zoology

1. What is the least positive integer that 180 should be multiplied by if the product is to be a perfect square? What is the least intiger we should multiply 180 by if the product to be a perfect cube?

2. A tank contains 50 liters of antifreeze. Ten liters are removed and replaced with water. The mixture is stirred. Ten liters of the mixture are removed and replaces with water. How many liters of water are now in the tank.

2007-10-22 15:03:36 · 1 answers · asked by James R 1 in Mathematics

1.Prove that a decimal (ie base 10) number a(subscript n)…a(subscript 2), a(subscript 1), a(subscript 0) is divisible by 11 if and only if the number (-1)^n*( a(subscript n)+…+a(subscript 2) - a(subscript 1) + a(subscript 0) is divisible by 11.

2.Evaluate (59/61), (30/59) showing all the steps and naming the laws used at each step. (Hint: Legendre’s symbols.)

3.Prove that if G=, then G=

4. Let G be a finite group, and let g,x∈ G
(a) prove that x and g^-1xg have the same order
(b) Let a,b∈G. Prove that ab and ba have the same order

This is i think the last of my exam help..thanks to everyone. i really appreciate it

Don

2007-10-22 15:00:32 · 1 answers · asked by Anonymous in Mathematics

2007-10-22 14:59:02 · 5 answers · asked by Bayou Baby 1 in Astronomy & Space

Wheat is poured through a chute at the rate of 10 ft^3/min and falls in a conical pile whose bottom radius is always half the altitude. How fast will the circumference of the base be increasing when the pile is 8 ft high?
I know that v= (1/3) py r^2 h
because r equals half h so
v= (2/3) py r^3
differentiate: (dv/dt) = 2py (r^2) (dr/dt)
and we also know that the circumference:
(dc/dt) = 2 py (dr/dt)
and then what can I do ??
plz help

2007-10-22 14:58:31 · 1 answers · asked by thatisme 2 in Mathematics

This is an experiment question..
suppose the water for the pan is not saturated with CO2. Will the reported percent CaCO3 in the original sample be too high, too low or unaffected...explain.....thanks

I say to low but im not sure

2007-10-22 14:58:00 · 1 answers · asked by bocabrunette714 1 in Chemistry

what is it exactly? is it a high or low frequency wave? is it technically sound?

2007-10-22 14:57:22 · 3 answers · asked by Anonymous in Engineering

How can nothingness produce mass and energy ?

If you must revert to a magic eye-in-the-sky, (like a Flying Spagetti Monster, God, Easter Bunny, or the Invisable Pink Unicorn, etc.), then what produced that deity ?

Please at least try to use facts, please...

2007-10-22 14:55:44 · 6 answers · asked by Jesus H. Zeitgeist 3 in Physics

Which of the following would you NOT see?

1. Stars crossing your meridian every 27.32 Earth days.
2. Stars rising and setting.
3. The Earth passing through a full cycle of phases.
4. The Earth rising and setting.
5. The Sun crossing your meridian every 29.53 Earth days.

2007-10-22 14:53:45 · 5 answers · asked by jason y 2 in Astronomy & Space