Science & Mathematics - 16 November 2007

2007-11-16 09:49:59 · 8 answers · asked by Cal 2 in Geography

calculate how many moles of the second reactant would be required to react completely with 5.00 mol of the first reactant

C2H6(g) + O2(g)-->CO2(g) + H2O(g)

all numbers are supposed to be subscripts.

Please explain how to get the answer if you can! cuz i don't understand it at all! thanks

2007-11-16 09:48:28 · 3 answers · asked by Anonymous in Chemistry

. A particle starts with velocity 30m/s& has constant deceleration of 10m/s^2.
find velocity after 1 sec, (b) time when velocity=0
(c) time taken to reach velocity of -30m/s.

2007-11-16 09:45:25 · 1 answers · asked by sophie 2 in Physics

2007-11-16 09:42:47 · 2 answers · asked by Anonymous in Astronomy & Space

i have a problem on my hw about vectors and the addition of them with direction and such

it says add:
63mph, 45 degrees north of west << i get that
54 mph, due northeast<< wat the heck does due mean?

i need a degree like 45 or 90 or something but why do some problems use due? i have not a clue wat due means!

2007-11-16 09:39:14 · 4 answers · asked by Wanda McAlias 2 in Physics

2007-11-16 09:38:19 · 7 answers · asked by christine2550@sbcglobal.net 2 in Astronomy & Space

2007-11-16 09:38:06 · 3 answers · asked by Anonymous in Medicine

I need help when "changing a fraction, decimal, or a percent to the other to options. I.E

95%= .95= 95/100

Now how to I change the decimal 0.80 to a fraction and percent?
3/9 to a decimal and percent
6/8 to a decimal and percent
66 2/3% to a fraction and decimal?
Just give me the answer pleaseeeeeeeeeee!!!!!!!!!!!

2007-11-16 09:32:45 · 10 answers · asked by Anonymous in Mathematics

2007-11-16 09:30:49 · 4 answers · asked by Matt P The sexy Genius 3 in Chemistry

2007-11-16 09:27:25 · 4 answers · asked by N S 1 in Earth Sciences & Geology

(a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.77 atm while the temperature is held constant.
______________________ Liters


(b) Use Charles's law to calculate the volume the gas will occupy if the temperature is increased to 167°C while the pressure is held constant.
_________________________ Liters

2007-11-16 09:24:19 · 1 answers · asked by Anonymous in Chemistry

(a) 1s22s22p63s1

(b) 1s22s22p63s23p63d104s24p6

(c) 1s22s22p63s23p64s1

2007-11-16 09:23:08 · 1 answers · asked by Anonymous in Mathematics

Take the integral from [0 to pie] of 1/2(cos x + | cos x | ) dx =

and yes those are absolute value indications around the 2nd cos x.
0 = lower bound pie = upper bound

2007-11-16 09:21:42 · 2 answers · asked by USA*ELite* 2 in Mathematics

Can anyone explain how this is done?
Thanks.

2007-11-16 09:20:06 · 2 answers · asked by jess r 1 in Mathematics

This is for a science project.
Science fair topic: Will a plant grow faster with coke or sprite??

2007-11-16 09:18:58 · 2 answers · asked by la bella vita 2 in Botany

2007-11-16 09:18:39 · 30 answers · asked by maryjane 2 in Chemistry

A student makes random guesses for 10 true/false questions. What is the probability of getting one correct answer?

I can't seem to get the logic figured out on this one. Can someone set me in the right direction?

Thanks

2007-11-16 09:17:37 · 21 answers · asked by Bill 1 in Mathematics

1.A negative acceleartion might mean that an object is speeding up while going in the __________ direction.
2. Horizontal or diagonal lines on a position-tine graph indicate that no ____________ occurs.
3. When velocity is negative and acceleration is positive an object is_____________________.
4. An object that is slowing down in the ____________ direction has a negative accelaration.
5. A curvilinear line on a ____________- time graph represents uniform accelerated motion.

2007-11-16 09:13:59 · 1 answers · asked by Whitney 1 in Physics

It takes a plane 40 min longer to fly from Boston to Los Angeles at 525 mi/h than it does to return at 600 mi/h. How far apart are the cities?

a 2,500 miles

b 2,650 miles

c 2,800 miles

d 3,200 miles

2007-11-16 09:05:30 · 5 answers · asked by Anonymous in Mathematics

OK you geniuses. Here is one in the field of celestial mechanics. Let's see who can figure out the correct answer to this one. (Totally hypothetical of course.) Good luck.

If the Earth was to suddenly double in size in both its diameter and it's density, which of the following things would occur as a result?

A) The speed of it's orbit around the Sun would slow down.
B) The speed of it's orbit around the Sun would increase.
C) The Earth's distant to the Sun would decrease due to gravity.
D) The Earth's distance to the sun would increase due to angular momentum.
E) The correct answer is actually A+C.
F) The correct answer is actually A+D.
G) The correct answer is actually B+C.
H) The correct answer is actually B+D.

(PS...Let's forget about the Moon for the sake of the question.)

2007-11-16 09:05:02 · 3 answers · asked by Becky 3 in Physics

Young Earth Creationists make an interesting point that you cannot believe the Bible and believe in an earth older than 6-10k years old because any other viewpoint than this indicates that there were many years of death (whether animals or human) before the Bible's story of the Fall begins. The Fall of man, the original sin, led to death. That said, there had to be a time when there was no death, if there was no death, then billions of years equals billions of animals and not enough resources and land mass to support this compounding problem. With this in mind, can I claim to believe the Bible and still somehow believe the earth is as most scientist (only Christian Scientists believe in a young earth) believe is billions of years old?

2007-11-16 09:04:35 · 7 answers · asked by Anonymous in Earth Sciences & Geology

2007-11-16 09:04:07 · 2 answers · asked by Anonymous in Biology

rod of Pyrex glass is precisely measured against an aluminum measuring stick at a temperature of 20°C, and the length of the rod is measured as exactly 25.0 cm. The temperature in the lab is then raised to 35°C for one hour, and then the Pyrex rod is measured a second time against the same measuring stick. The second measurement of the rod’s length can be expected to be:
A. 25.0 cm.
B. greater than 25.0 cm.
C. less than 25.0 cm.
D. less than or equal to 25.0 cm.

2007-11-16 09:03:52 · 4 answers · asked by Anonymous in Engineering

x^2+y^2=2
x+y=1
solve this by using substitution
because i am stuck with this

2007-11-16 09:01:54 · 5 answers · asked by star baller 360 5 in Mathematics

I know it happens at sea and it involes electricity !

2007-11-16 08:59:39 · 29 answers · asked by windy 1 in Earth Sciences & Geology

on cortisone for 2 days now have diarrea will it be a side effect

2007-11-16 08:59:21 · 2 answers · asked by lucy 1 in Medicine

If the base of triangle ABC is 13 inches and the height is ib inches, what is the area in square inches of triangle ADF.


How would you go about working this problem out ?


Like the one posted here http://mathforum.org/pow/solutio75.html

ADF being the triangle on the far right.....ABC being the whole triangle.

2007-11-16 08:53:31 · 1 answers · asked by yo mamma 3 in Mathematics

what the differance with a jungle, rainforest,and a forest and woods????

2007-11-16 08:53:31 · 15 answers · asked by barney d 1 in Geography

Is there any light of moon. we normally see moon with a white light on it which becomes brighter on its 14th date. The light we see from our naked eye on the surface of the moon from our earth. Is this the light of moon or it just the shadow of sun. kindly answer my question.

2007-11-16 08:52:58 · 6 answers · asked by Sheikh Ahmad 1 in Astronomy & Space

This is an internet homework, and the answer does have +c in it. I have no idea how to do this since its asking for indefinite, but then it gives me from 0 to pi/4.... any ideas?

2007-11-16 08:52:31 · 4 answers · asked by Zach B 1 in Mathematics