Science & Mathematics - 1 November 2007

From this equation, S(s) + O2(g)--->SO3(g)
Suppose exactly 5g of each reactant is available, determine which reactant is limiting. Showing steps

2007-11-01 15:53:15 · 1 answers · asked by Anonymous in Chemistry

y = x^2 + 2x - 6

2007-11-01 15:52:19 · 3 answers · asked by Juan C 6 in Mathematics

the length of the semi-major axis is 6 units, and teh foci are located at (0,2) and (8,2)

2007-11-01 15:52:00 · 2 answers · asked by Ethan 1 in Mathematics

When did the general public give in to the fact that the earth was round? Would people in Italy still think it was flat in 1565?

2007-11-01 15:51:32 · 5 answers · asked by Bubblegum!Bakes! 2 in Earth Sciences & Geology

I've always been able to predict things.
And I know about people's feelings before they tell me.

There's also a lot of other weird stuff that's hard to explain.

So, does anyone out there experience the same sort of stuff, or am I just a really good guesser?

Thank you!

2007-11-01 15:51:03 · 9 answers · asked by ~*i love ny*~ 2 in Parapsychology

so hypotonic is when there is a greater concentrarion outside the cell and hypertonic is when there is a greater concentration in the cell. we recently did a lab that show the shrinking and swelling of celery cells in the 2 solutions. i have to explain why the mass of one increased and the other decreased. i know it has to do with osmosis but i just can't seem to understand how to word it.

2007-11-01 15:49:58 · 3 answers · asked by antioxidant 2 in Biology

2007-11-01 15:49:23 · 5 answers · asked by bro..ken.. h e a r t 1 in Chemistry

Can someone help me change this standard form equation into a slope intercept eqaution???

4x+5y=15

2007-11-01 15:48:03 · 11 answers · asked by Cody L 1 in Mathematics

2007-11-01 15:47:36 · 10 answers · asked by julia k 1 in Mathematics

2007-11-01 15:45:29 · 7 answers · asked by Anonymous in Botany

Plss.....include when they occured...you can even include mississauga or toronto.......also include What are the evidences of these events we can see!!

2007-11-01 15:43:14 · 1 answers · asked by Turquoise 3 in Geography

1) Factor the following polynomial completely.
4 x^2 - 27 x + 35

2) Factor the following polynomial completely.
8 x^2 - 50 x - 13

3) Factor the following polynomial completely.
9 x^2 - 1

4) Factor the following polynomial completely.
27 x^2 - 363

Any help would be greatly appreciated! Thank you!

2007-11-01 15:41:42 · 6 answers · asked by Brandon M 1 in Mathematics

ok i have 2 questions from my bio assignment...
a) what factors limit the size of a cell?
b) How can cells change to overcome this size limitation?
help would be greatly appreciated!!! thanx!!!

2007-11-01 15:39:55 · 4 answers · asked by Anonymous in Biology

3n-2 7
---------- = ------
5 10

2007-11-01 15:39:43 · 2 answers · asked by Anonymous in Mathematics

1. 5x^2-15=0

2. 5x^2=14+33x

2007-11-01 15:39:16 · 3 answers · asked by Anonymous in Mathematics

Which of the following organelles is found in plant cells but not in animal cells?

nucleus
mitochondorion
chloroplast
golgi appartatus

the end products of photosynthesis include
carbon dioxide and water
sugars
carbon dioxide and oxygen
oxygen and water


A cell that contains a cell wall, chloroplasts, and a central vacuole is a
plant cell
animal cell
prokaryotic cell
bacterial cell


a central vacuole forms from
chloroplasts
fusion of amyloplasts
the fusion of smaller vacuoles
products of photosynthesis


Where are thylakoids located?

2007-11-01 15:39:04 · 3 answers · asked by Cross 2 in Biology

a man is walking along a straight road heading north when he spots the top of a tower in the direction NxºE, behind low lying trees. The angle of elevation to the top of the tower is yº. After walking d meters along the road he notices that the tower is now NzºE of the road and that the angle of elevation of the top of the tower is now aº. Let the height of the tower be h meters.

How much further must he walk before the tower is located in an easterly direction?

2007-11-01 15:36:21 · 2 answers · asked by patrickfmcooper 1 in Mathematics

How long did it take from blast off to touch down on the moon? They are talking about humans going to Mars, how long will the trip take, 6 months? Our earliest robotic exploration vehicles (launched in the mid-70's) are now just crossing the outer reaches of the solar system. Our nearest neighboring star is 4.2 light years away. Obviously, we aren't going anywhere with our current means of propulsion. So, what can we do and how soon will it take to do it?

2007-11-01 15:36:14 · 5 answers · asked by primalclaws1974 6 in Astronomy & Space

2007-11-01 15:32:30 · 5 answers · asked by dieseltank 1 in Engineering

Find the Height of the Airplane:

An airplane is spotted by two observers who are 1000 feet apart. As the airplane passes over the line joining them, each observer takes a sighting of the angle of elevation to the plane. One observes 40degrees, other 35degrees. How high is the airplane?

2007-11-01 15:32:00 · 5 answers · asked by Anonymous in Mathematics

2007-11-01 15:31:31 · 4 answers · asked by Anonymous in Astronomy & Space

2007-11-01 15:31:25 · 4 answers · asked by Anonymous in Biology

S.O.S

2007-11-01 15:30:59 · 6 answers · asked by crea 1 in Weather

is it the excretory or circulatory?

2007-11-01 15:30:12 · 3 answers · asked by antioxidant 2 in Biology

2007-11-01 15:28:40 · 5 answers · asked by Anonymous in Astronomy & Space

2007-11-01 15:28:36 · 4 answers · asked by Anonymous in Geography

We have this lab setup with an airtrack and two carts of different masses. They each have a magnet on them so they repel each other. This is for a high school physics class and we want them to weigh the carts and let them start with zero initial speed. Then they will let them go and we have meters that measure their speeds. So they could do this once and figure out if the two carts end with the same momentum but how can they do a bunch of trials and end up with a %uncertainty? The two momentums should be the same, but for each trial, they might be different. How can they calculate a result that says, yes, momentum is conserved?

2007-11-01 15:28:14 · 1 answers · asked by califrniateach 4 in Physics

Until he was in his seventies, Henri LaMothe excited audiences by belly-flopping 9 m into 30 cm of water. Assuming that he stops just as he reaches the bottom of the water, find the magnitudes of the average force and the total impulse on him from the water. Assume his mass is 60 kg.

I calculated the total impulse to be 783.5 N*s. What would the average force be? I know it's impulse/change in time but I am having trouble calculating it. Thanks for your help!

2007-11-01 15:26:24 · 1 answers · asked by locowise 2 in Physics

2007-11-01 15:24:10 · 11 answers · asked by Lisa G 2 in Zoology

is the krakatau , sunda strait , indonesia a shield volcano, cinder cone volcano, or a composite?

2007-11-01 15:22:54 · 1 answers · asked by Anonymous in Earth Sciences & Geology