Science & Mathematics - 5 November 2006

1. it dissolves into ions
2. it forms covalent bonds with water
3. it forms hydrogen bonds with water

2006-11-05 11:07:02 · 1 answers · asked by annie 3 in Chemistry

Did I do this problem right?
.................................................__
I got 4 sq.root 5 (4 \|5 )

2006-11-05 11:05:10 · 7 answers · asked by Robyn & L 1 in Mathematics

1. If the price charged for a candy bar is p(x) cents, then x thousand candy bars will be sold in a certain city, where p(x) = 9-(x/22). How many candy bars must be sold to mazimize revenue? (I got the answer 198 thousan candy bars, please correct if wrong)

2.A small frictionless cart attached to the wall by a spring is pulled 10 cm back from its rest position and released at time t=0 to roll back and forth for 4 seconds. Its position at time t is s=1-10(cos)pi *t. What is the cart's max speed? WHen is the cart moving that fast? What is the magnitude of the acceleration then? (I got the answer 10pi=31.42cm/sec; t= .5 s, 1.5 s, 25s, 3.5s ; accel=0cm/sec^2, again please correct if wrong)

3.From a thin piece of cardboard 40 in x 40 in, square corners are cut out so the sides can be folded up to make a box. What demensions yield a box of max. volume. What is max. volume? (I got 26.7 x 26.7 x 6.7; 4746.7 in^3)

I would greatly appreciate if you could check and/or correct.
THANKS

2006-11-05 11:04:54 · 1 answers · asked by Anonymous in Physics

2006-11-05 11:03:30 · 3 answers · asked by lovee me hate mee♥ 2 in Zoology

I am rusty on my algebra. Trying to help my son with homework

2006-11-05 11:02:57 · 7 answers · asked by seren 1 in Mathematics

2006-11-05 11:00:05 · 11 answers · asked by Anonymous in Biology

as in the name 'Tristan Allen'

2006-11-05 10:59:30 · 3 answers · asked by Anonymous in Geography

and is the sodium ions attracted to the positive end of the water dipole????
god help me

2006-11-05 10:56:52 · 5 answers · asked by annie 3 in Chemistry

2006-11-05 10:54:05 · 1 answers · asked by delta one 1 in Chemistry

2006-11-05 10:52:37 · 9 answers · asked by annie 3 in Chemistry

2006-11-05 10:52:21 · 5 answers · asked by Anonymous in Chemistry

2006-11-05 10:51:38 · 2 answers · asked by frutigurl 2 in Physics

How do I gain confidence in my physics abilities? These problems are making me very, very angry.

2006-11-05 10:51:05 · 1 answers · asked by anonymous2372000 1 in Physics

2006-11-05 10:50:14 · 19 answers · asked by Anonymous in Mathematics

I have a square that is shaded and in the middle of the square there is a non-shaded circle. the length is 15 and the width is 15. Please give me clear answers with a description of how you got there. thank you

2006-11-05 10:48:32 · 6 answers · asked by Lacris 2 in Mathematics

A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 2.1 105 N. In being launched from rest it moves through a distance of 87 m and has a kinetic energy of 4.5 107 J at lift-off. What is the work done on the jet by the catapult?

2006-11-05 10:43:44 · 2 answers · asked by karito22706 1 in Physics

2006-11-05 10:41:03 · 4 answers · asked by JAMES B. G 1 in Engineering

2006-11-05 10:41:03 · 12 answers · asked by katey c 1 in Zoology

I understand that there is very little oxygen at 29,000 feet above sea level so climbing without bottled oxygen is extremely difficult. My question is this, if you are climbing with oxygen supplies y is it so hard to reach the top. I have read books about it and viewd films and they state that even with oxygen, it takes many breaths to even make one step. I dont get it because during WWII, bobediers flew in unpressurized airplanes with prmitive oxygen supplement systems at altitudes of up to 30,000 ft and seemed to have a much easier time functioning in the planes as compared to mountaneers. Why is that?

2006-11-05 10:40:26 · 8 answers · asked by Anonymous in Earth Sciences & Geology

I have the following question on my math homework, and cannot find a way to fin the answer. The question is:

Compute the length of the legs a & b, of a 90-45-45 triangle, Given the hypotenuse, c=50.

If anyone knows how to set up this problem, please let me know! Thank you anyone who can help!!!!

2006-11-05 10:39:50 · 9 answers · asked by Anonymous in Mathematics

2006-11-05 10:38:02 · 4 answers · asked by burundukgan 1 in Physics

I am trying to calculate the weight of a fish tank. I know the weight of the water but I'm not sure of the weight of the glass.

2006-11-05 10:35:05 · 5 answers · asked by Robert W 1 in Engineering

2006-11-05 10:34:58 · 20 answers · asked by maddg0fer 1 in Biology

I'm doing this chapter on heat reactions, enthalpies, etc. and I am absolutely confused. I've banged my head against the wall 21 times. I just don't understand it. Here's a question that is a good example of how all my other questions are. Could you not just give the answer, but show me how to do it? Thanks.

What is the final temperature, in degrees C, when 60.0 g of water at 80 degrees C is mixed with 40.0 g of water at 25 degrees C. The specific heat of water is 4.184 J/g x C.
a) 53 b) 58 c) 70 d) 35 e) 42

Thanks in advance

2006-11-05 10:34:52 · 1 answers · asked by chris m 2 in Chemistry

I have forty pages of interesting articles, not one of which addresses the mechanics of the thing.

2006-11-05 10:31:23 · 2 answers · asked by Anonymous in Zoology

2006-11-05 10:30:56 · 2 answers · asked by Anonymous in Zoology

Can anyone help me understand how to divide in base 2 numbers. For instance,

1011/11 in base 2

2006-11-05 10:29:58 · 6 answers · asked by Rhonda N 1 in Mathematics

what are the checkpoints for the G1 phase and the M phase? What are protein kinases? Can you give me an example of "Cyclin dependent kinases?"

2006-11-05 10:29:30 · 1 answers · asked by Seanoso88 1 in Biology

2006-11-05 10:29:09 · 5 answers · asked by s_miw 1 in Chemistry

the rate of enzyme activity (catalyzation) went up. I don't understand this! Do the enzymes work harder when there is more to do?

I would appreciate any explanations, or websites i might find useful. Thanks so much!

2006-11-05 10:26:07 · 2 answers · asked by ChaChaChingThing 2 in Chemistry