Science & Mathematics - 17 September 2007

say I have 1 + 2 - 3, how do I know whether its 1 + (2-3) or (1+2) - 3 or (1-3) + 2?

2007-09-17 14:44:12 · 17 answers · asked by Mandél M 3 in Mathematics

where can i find a video/clip of a pumping/beating human heart? i tried youtube and google video, maybe im not using the right keywords? help appreciated, thanks.

2007-09-17 14:41:10 · 1 answers · asked by Anonymous in Medicine

2007-09-17 14:39:16 · 2 answers · asked by GraceFace 1 in Biology

we know that there are two types of electrons, free electrons and in bound, i wanted to know whether they die or destruct or not?

2007-09-17 14:37:19 · 3 answers · asked by mina1828 1 in Physics

i am mean like if u close ur eyes..it is dark so why not be afraid at that time too?

2007-09-17 14:37:01 · 4 answers · asked by Chocogal 7 in Other - Science

A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.10 m/s and her body makes an angle of 73.0° with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude and direction.
___m/s (magnitude)
____° (direction)

2007-09-17 14:34:52 · 2 answers · asked by Marianna E 1 in Physics

For the limit below, find values of δ that correspond to the M values.
lim tan^2(x) = infinity
(x-->pi/2)

M=1,000
δ=?

2007-09-17 14:30:40 · 3 answers · asked by Anonymous in Mathematics

For the upcoming science fair, I'm toying with the idea of such an experiment.
How do you think I could compare the bacteria in food samples? Is there some kind of solution that I could use with a food sample that could determine the level of contamination?
Oh, and please keep this relatively simple. I'm in the eight grade.

2007-09-17 14:28:57 · 3 answers · asked by ♥Jenny! 3 in Biology

is there any online calculators that i can use to get solutions to these kind of problems

1. y 5/2

2. q 3/2

2007-09-17 14:27:05 · 1 answers · asked by percy m 1 in Mathematics

This is a gastric by pass surgery. I'm not talking about the lap band procedure.
This is the one where they give you a list of all the things that can go wrong & death is a the bottom of the list.
I understand that AMA was trying to get this surgery banned because of the high mortality rate.
I had mine done in 1998.

2007-09-17 14:26:31 · 2 answers · asked by ♫ Bubastes, Cat Goddess♥ 7 in Medicine

the adult skeleton?

2007-09-17 14:23:39 · 1 answers · asked by Terri L 2 in Biology

anyone know how to solve this? you gotta use elimination.

2007-09-17 14:21:58 · 8 answers · asked by Anonymous in Mathematics

if the perimeter or a rectangle is 82ft and the length is 15ft longer than the width. What are the length and width

2007-09-17 14:21:41 · 2 answers · asked by hee-ya-coo 2 in Mathematics

We want to know what numbers belong to the image of (a + 1)(a +2b) / 2, and I believe it's all natural numbers except those in the form of 2^n based on plugging in some numbers.

But I don't know how to start proving.

2007-09-17 14:21:04 · 1 answers · asked by Anonymous in Mathematics

How could you determind the volume of an object that floats?

2007-09-17 14:20:51 · 1 answers · asked by Anonymous in Physics

How can these laws be used to describe the motion of the planets in our solar system?

First correct answer gets 10 points - please note this is a 2 part question. Thanks!

2007-09-17 14:17:05 · 5 answers · asked by Caitlin 2 in Astronomy & Space

When chasing a hare along a flat stretch of ground, a greyhound leaps into the air at a speed of 12.7 m/s, at an angle of 25° above the horizontal.
(a) What is the range of his leap?
___m
(b) For how much time is he in the air?
___s

2007-09-17 14:15:15 · 1 answers · asked by Marianna E 1 in Physics

What three dimensional figure could be made with a circle, triangle, and a square?

2007-09-17 14:14:38 · 4 answers · asked by John 2 in Mathematics

This is part of my science fair project also.

2007-09-17 14:14:22 · 15 answers · asked by naedo 1 in Astronomy & Space

whats the square route...

of 6

of 50

of 2

thanks..

2007-09-17 14:13:22 · 6 answers · asked by Alexxxxxxxx 1 in Mathematics

Solve each system of inequalities by graphing

x+y<8
x greater then or less then 0
y greater then or less then 0

( fyi, greater then or less than is this > with a line underneath)

technically I already have the answer

at y i have it plotted at 6 (y vertical line)

and at x i have it plotted at 7

My problem is I keep looking at this problem having no clue how that answer is true. I also dont understand the whole shade up or shade down thing (in this problem its shaded below so that with the line drawn it looks like a right triangle)

so to sum it up could someone tell me how to graph these types of problems?

2007-09-17 14:11:46 · 2 answers · asked by Anonymous in Mathematics

How would i figure this out. That is a sample problem, any help would be nice.

2007-09-17 14:10:44 · 6 answers · asked by bearbear 1 in Mathematics

example-----Ag3P or PbS

2007-09-17 14:10:41 · 1 answers · asked by sweet17_00123 1 in Chemistry

2007-09-17 14:10:33 · 1 answers · asked by MrMechanic 1 in Chemistry

how do i convert this decimal problem into a fraction?

.0133333 (repeating)

2007-09-17 14:10:00 · 2 answers · asked by IDchecker27 2 in Mathematics

how do you find the dsplacement under a curve (parabola) in the velocity time graph?

2007-09-17 14:09:20 · 1 answers · asked by Anonymous in Physics

how do you solve this??? you have to use elimination..

2007-09-17 14:07:16 · 7 answers · asked by lover 1 in Mathematics

HElp
?> I placed a hydrometer in water and half of it stickss out of the water A new liquid
(can be any) that is half the dense of water is tested how much of the hydro meter will stick out of the water
I know the answer is 1/4 in 3/4 is out but what is the formula!!!!

2007-09-17 14:06:04 · 3 answers · asked by Fin 1 in Engineering

How will I set this problem up? 30cm/10g.

2007-09-17 14:05:32 · 3 answers · asked by diiA b. 1 in Physics

1) What is the purpose of the rough ER (in the cell)?

2) What is the purpose of the smooth ER (in the cell)?

3) What is cellular respiration?

4) One of the cells main function is to maitain homestasis. what does this mean? five reasons why this is true???

5) What are diffusion and osmosis? how do they relate to the function of a cell membrane?

answers to ANY of these questions is appreciated!

2007-09-17 14:05:03 · 4 answers · asked by Anonymous in Biology