Science & Mathematics - 26 November 2006

this homework deals with additions to alkynes. provided are the links to the homework problems plus my answers. please be so kind as to check my answers. i appreciate it very much.

homework page 1:
http://img.villagephotos.com/p/2006-10/1223233/ochemhw10p1.JPG

page 2:
http://img.villagephotos.com/p/2006-10/1223233/ochemhw10p2.JPG

my answers:
1-D
2-B
3-A
4-C
5-B
6-D
7-D
8-C
9-A

2006-11-26 09:07:18 · 1 answers · asked by pilatesfreak 2 in Chemistry

this is college chemistry. The molecules of PF5 and AsF5 exist, but the analogous molecule NF5 does not. Why not?
thanks for the help!

2006-11-26 09:07:14 · 7 answers · asked by Richard N 1 in Chemistry

A 2.00-kg ball, A, is moving at a speed of 5.00 m/s. It collides with a stationary ball, B, of the same mass. After the collision, A moves off in a direction 30.0° to the left of its original direction. Ball B moves off in a direction 90.0° to the right of ball A's final direction. How fast is ball A moving after the collision?

2006-11-26 09:07:11 · 2 answers · asked by lindi 2 in Physics

line X=2 is the perpedicular bisextor of AB? Please help!

2006-11-26 09:06:47 · 3 answers · asked by Min 1 in Mathematics

9/2 is nine halves and 2/3 is two thirds

2006-11-26 09:06:23 · 2 answers · asked by hispanic_guy2009 1 in Mathematics

A force of 1000 pounds compresses a spring 7 inches from its natural length. How much work (in foot pounds, correct to the nearest whole foot pound) is done in compressing the spring an additional 5 inches?

2006-11-26 09:06:22 · 2 answers · asked by Olivia 4 in Mathematics

how do i add
10011two and 1110two (the two's are subscripts)

2006-11-26 09:06:19 · 2 answers · asked by TrackStar 3 in Mathematics

They are always growing, but why doesnt it hurt to cut them? Just curious....

2006-11-26 09:06:16 · 9 answers · asked by Anonymous in Other - Science

It's snowing like crazy in Mission, BC where I am, it's so wierd beacuse it hardly ever even snows like this at christmas, rarely this early in winter.

2006-11-26 09:05:50 · 10 answers · asked by Anonymous in Weather

are we walking amongst extra terrestrials ???
have you ever seen a flying phenomenon???
do aliens even exist what do you believe???
do you think we are being watched???

2006-11-26 09:05:38 · 40 answers · asked by AnswerGeek 4 in Astronomy & Space

- Atmospheric composition
- What is the physical composition of the planet?
- Are there any physical features on the planet?
- Other special feature of the planet
this is what I need help on please!

2006-11-26 09:05:36 · 5 answers · asked by Anonymous in Astronomy & Space

2006-11-26 09:05:20 · 1 answers · asked by Lizzie 1 in Earth Sciences & Geology

A rifle with a muzzle velocity of 2000 ft./sec. is fired horizontally at a height of five feet above level ground. Ignoring air resistance, how far (nearest whole foot) does the bullet travel from the end of the muzzle of the rifle before it strikes the ground

2006-11-26 09:04:05 · 6 answers · asked by chris 2 in Mathematics

when we do find them.when we will only have a war with them.
They will have different religions, new oil suplies.
No I think we shouldnt look.
Why make them suffer?

2006-11-26 09:03:43 · 19 answers · asked by Anonymous in Astronomy & Space

A: The derivative of a definite integral is always zero.

B: If f(x) = |2x - a| , then f '(2a) does not exist.

a. Only A is true.
b. Only B is true.
c. Both A and B are true.
d. Both A and B are false.

2006-11-26 09:02:27 · 1 answers · asked by chris 2 in Mathematics

During action potential it's written in the text that potassium channels open and also the fast na+ channels i wnat to know if there are opened k+ channels opened in the resting potential or not>>>>>

2006-11-26 09:02:22 · 1 answers · asked by Mostafa O 2 in Chemistry

i'm really stressed out about all this science fair hoo-blah and i need to know the chemical formula for thionin( if there is one). can anyone please help??!!

2006-11-26 09:00:02 · 1 answers · asked by musical_genius 3 in Chemistry

I thought the answer was Y=2 but the possible correct answers are:

1)-6

2)-3

3)-2

4)-2/3

5)2/3

2006-11-26 08:59:23 · 6 answers · asked by Min 1 in Mathematics

how do I do a math problem like this solve for b. a=1/2bc^2

2006-11-26 08:57:33 · 2 answers · asked by Jeff D 1 in Mathematics

Suppose I have a problem: 1/x > 7

I want to solve the inequality for x.
Can someone give me the right answer and show their work?

2006-11-26 08:54:41 · 2 answers · asked by Anonymous in Mathematics

- A ball is projected horizontally from the edge of a table that is 1.00 m high, and it strikes the floor at a point 1.20 m from the base of the table. (a) What is the initial speed of the ball?(b) How high is the ball above the floor when it's velocity vector makes a 45 degree angle w/ the horizontal.

Ok. For (a).. I found the time to be .45 sec and used that to find the initial velocity which i found to be 2.67 m/s...
(b) is rlly confusing me... I don't get it at all... The angle is confusing me... I drew the projectile but ... SOMEONE HELP!

2006-11-26 08:51:25 · 2 answers · asked by Sheyna 1 in Physics

2006-11-26 08:47:56 · 1 answers · asked by Un Known 1 in Chemistry

2006-11-26 08:47:05 · 7 answers · asked by DEBRA S 1 in Mathematics

Thanks

2006-11-26 08:46:51 · 8 answers · asked by Meow~ 4 in Physics

2006-11-26 08:46:28 · 3 answers · asked by kristin e 1 in Biology

what is the answer?

2006-11-26 08:45:57 · 29 answers · asked by GIACOMO A 1 in Mathematics

It seems to me that the human mind can only think in 3 dimensions. But are there any suggestions out there as to how something can exist in 4 or more.

2006-11-26 08:45:48 · 8 answers · asked by Sebi 1 in Physics

IF G is a cyclic group, there exist exactly one intermediate field I of degree k, for each integer k dividing [K : F].

Well, anyway I have to prove that. here is my problem. Our textbook hasn't expalined in any way what a Cyclic Galois Group is at all.
I do know that a Cyclic Group consists of all the powers of the generator, and that every subgroup of cyclic group is cyclic, but it's really not helping me apply this to Galois groups.
Anyway if you know of this in any way or can point me in the right direction or what theorms to look at go for it. My brain is fried and I give up for now.

2006-11-26 08:45:35 · 3 answers · asked by travis R 4 in Mathematics

please show all work! thank you.

2006-11-26 08:44:46 · 2 answers · asked by Anonymous in Mathematics

V = 120sin(120(pi)t) If a resistance of R = 20 ohms is present, what is the current I (using Ohm’s Law V = IR)? What is the amplitude and period of the current I?

2006-11-26 08:42:54 · 1 answers · asked by Anonymous in Physics