Science & Mathematics - 19 November 2006

what is 7 1/4 - 3 7/8?

2006-11-19 12:00:51 · 9 answers · asked by Anonymous in Mathematics

Please explain...

2006-11-19 11:57:48 · 7 answers · asked by Dee Dee 1 in Mathematics

Sin^2x / 1- Cosx = Secx + 1 / Secx

2006-11-19 11:54:28 · 4 answers · asked by achka85 1 in Mathematics

how do u do this?..

estimate by rounding to the greatest place:2.08 x 0.39

2006-11-19 11:52:49 · 8 answers · asked by i-love-you! 1 in Mathematics

And or why not?

2006-11-19 11:52:35 · 2 answers · asked by Lady T 3 in Botany

2006-11-19 11:52:01 · 10 answers · asked by Anonymous in Astronomy & Space

To find the kinetic friction do I have to find kinetic energy for individual directions (N-S or E-W)

2006-11-19 11:51:35 · 2 answers · asked by 8 3 in Physics

2006-11-19 11:45:58 · 6 answers · asked by Sarah 2 in Zoology

is the earth magnetic field bigger/smaller according yo my altitude? is the earth magnetic field bigger smaller according to my latitude?what is the value of earth magnetic field at the sea level in the equator?can the earth magnetic field move/rotate a magnetic bar?how do i calculate the force/moment of last question?
plz give me units,formulas,values of earth magnetic field biography would be nice. thx everyone for your time taken to answer and sharing knowledge msn: sergioqcostas@hotmail.com contact me if u have answers plz. :)

2006-11-19 11:45:27 · 3 answers · asked by sergioqcostas 1 in Physics

Thanks for taking the time to answer, and read this.

Question: A protein in the phospholipid bilayer binds with an ion, and then changes shape so that the ion can move into the cell. This is an example of
(A)osmosis (B)facilitated diffusion (C)endocytosis (D)active transport

The process in the question above: (A)requires energy (B)does not require energy

Thanks again!

2006-11-19 11:44:45 · 8 answers · asked by Nerds Rule! 6 in Biology

(Science)

2006-11-19 11:42:39 · 4 answers · asked by Nicole<333 2 in Astronomy & Space

The Houson Astros and the Texas Rangers are going to play a best two-out-of-three exhibition game series. What is the probability that the series will end in two games????

you guys i really don't get it, please help me i know this is an elementary problem but :( Help.

2006-11-19 11:41:53 · 3 answers · asked by renna 1 in Mathematics

2006-11-19 11:40:43 · 3 answers · asked by Anonymous in Chemistry

Please show me the equation for this???

2006-11-19 11:38:23 · 15 answers · asked by Dee Dee 1 in Mathematics

I think the conventional view is that people are close together and inside more often during the winter.

My theory is that the schools are back.

Anyrate, I went out to spread my germs around. What happens in Australia when it is sunny in winter?

2006-11-19 11:38:07 · 3 answers · asked by Perseus 3 in Medicine

Specialization of cells in multicellular organisms is usually due to different patterns of gene expression rather than to differences of the gene themselves?

2006-11-19 11:35:52 · 1 answers · asked by bigjerry213 1 in Biology

When should i test?
ok here is my story. i had my period in spetember from the 22-24th which was lighter than normal, in october i had it on the 24th which was four days late and only lasted one day. i haven't had a period this month yet but i have been tired all the time, been getting headaches, the skina round my nipples has gotten really dark, my breast are tender to the touch expecially around the nipples, i have been sick to my stomach everyday for the last couple of weeks i am trying to figure out when my period should come this month and when i should take a pregnancy test....can anyone help me? serious answers please!!!!

2006-11-19 11:29:43 · 5 answers · asked by evilsangel 1 in Medicine

I'm doing a paper for Biology II on predation. It's an explanatory paper focusing on what happens when predation goes wrong, i.e. over population resulting in famine, etc. So I need a visual example that isn't just your standard cheetah chasing down an antelope. Any ideas? Specific graph or photo links are what I'm looking for.

2006-11-19 11:29:35 · 1 answers · asked by Viva_boheme 2 in Biology

2006-11-19 11:29:24 · 11 answers · asked by some1 1 in Biology

2006-11-19 11:29:13 · 12 answers · asked by ftrgtytyhtytytu 1 in Zoology

1. Explain why free-fall acceleration can be regarded as a constant for objects falling within a few hundred miles of Earth's surface.


2.Calculate the mass in kg of an object that wieghs 1225 N on Earth.


3.Apply Newtons first and second laws to expalin why an object moving in a circular path at a constant speed is undergoing acceleration and has a force exerted on it.

4.Determine the force needed to accelerate a 1357 kg car forward at 8.0 m/s^2.

5. Indicate which of the following has greater momentum: a 500 kg car moving at 64 km/h, a 250 kg cart moving at 128 km/h, or a 1000kg truck moving at 32 km/h.

please help at least anwser one please i'm begging

2006-11-19 11:28:28 · 5 answers · asked by Sarah S 1 in Physics

Or is it both?

2006-11-19 11:28:25 · 10 answers · asked by Anonymous in Weather

i am totally failing chemistry. how do i pass? what do i need to know? and dont say study and take notes. i am already doing that. and i have already stayed after school to get help. it doesnt work. i have no idea whats going on in that classroom. everything the teacher says is a foreign language to me. i am so lost! help!

2006-11-19 11:26:00 · 11 answers · asked by emo girl 3 in Chemistry

Will it be through analysis of radio/light waves?
Will it be a physical encounter?
Or some other method?

2006-11-19 11:24:47 · 11 answers · asked by timespiral 4 in Astronomy & Space

I got an Led that has a battery holder and it was working when I cut the wires off the led. The wires were getting hot and the batteries were giving off heat. Then, a couple minutes later, i thinnk i heard a crack. Then when I switched the power to on, the battery was not giving off any heat into the wires. I need help.

2006-11-19 11:24:17 · 1 answers · asked by Igobeg O 3 in Engineering

how is the concept of electron density used to describe the position of an electron int eh quantum mechanical treatment of an atom?

2006-11-19 11:24:03 · 1 answers · asked by avalentin911 2 in Chemistry

how can we control global warming?...
we cant stop america and the rest of the world from polluting th eenvironment with co2 gases....and also, it wud be a slow process even if we cud...

then what other alternative do we have?
is planting of trees going to do some help?...or is there any other way?
if there are some ways,...then maybe we can start doing smthing for the nature we love..
please comment on this...

2006-11-19 11:24:02 · 11 answers · asked by niranjnn 1 in Weather

2006-11-19 11:21:06 · 3 answers · asked by beaner 1 in Chemistry

a certain radioactive isotope has a half-life of 24,000 years. If there are 4 grams of the isotope remaining after 21,500 years, how many grams were there originally????

2006-11-19 11:18:36 · 6 answers · asked by sportsrlife 1 in Astronomy & Space

2006-11-19 11:18:13 · 2 answers · asked by Devynne 2 in Biology