Science & Mathematics - 7 November 2006

Vertices (7,5) and (7,-1) Foci (7,7) and (7,-3)

2006-11-07 15:12:09 · 2 answers · asked by Anonymous in Mathematics

2006-11-07 15:11:22 · 5 answers · asked by shasha 1 in Botany

I am trying to make acetone with the reaction of isopropyl alcohol + bleach + vinegar (acetic acid). I know this reaction works but I have to keep track of how much oxidizing agent I have in solution periodically and to do this I need an indicator such as the stach Iodide complex. I can purchase starch at the grocerey store but I am going to have to make my own KI since you need a perscription for it from the pharmacy. So I already know how to isolate the Iodine from table salt and I have purchased NuSalt which is just KCl, but know I am trying to figure out a reaction between KCl and Iodine that will let me end up with KI in the end. Any help anyone can give me would be much appreciated. I know I can't just add them together because Cl is more reactive than Iodine so the rxn won't be driven forward. I just can't think of anything. Please someone help me. Thanks for any help you can give.

2006-11-07 15:07:08 · 3 answers · asked by Chem_lover_Chris 2 in Chemistry

A rod suspended on its end and acting as a physical pendulum swings with a period of 0.7 s. What is its length? (g = 9.80 m/s^2)

2006-11-07 15:03:27 · 4 answers · asked by tonberry79 3 in Physics

2006-11-07 15:03:02 · 9 answers · asked by ceegkhan 2 in Zoology

2006-11-07 15:02:37 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2006-11-07 14:58:30 · 6 answers · asked by casey f 1 in Earth Sciences & Geology

2006-11-07 14:58:30 · 4 answers · asked by Anonymous in Biology

Geometry question

2006-11-07 14:57:56 · 11 answers · asked by SeLaVi23 2 in Earth Sciences & Geology

I am a msc electronic science student. Can i join for research in nuclear physics? If u you know pls tell.

2006-11-07 14:57:16 · 3 answers · asked by Anonymous in Physics

2006-11-07 14:55:54 · 9 answers · asked by Anonymous in Biology

and the angle that it makes with the larges force. Solve analitically using the parallelogram of forces. f1 = 90 N, f2 = 100 N

2006-11-07 14:55:48 · 3 answers · asked by Anonymous in Engineering

2006-11-07 14:55:06 · 3 answers · asked by Bow Chika Bow Wow 2 in Engineering

2006-11-07 14:51:57 · 7 answers · asked by tannie2811 1 in Zoology

2006-11-07 14:50:58 · 18 answers · asked by jon m 1 in Astronomy & Space

A race car starts from rest on a circular track of radius 400 m. Its speed increases at the constant rate of 0.5 m/s. At the point where the magnitudes of the radial and tangential accelerations are equal, determine (a) the speed of the race car, and (b) distance traveled, (c) the elapsed time.

2006-11-07 14:49:13 · 4 answers · asked by thefishbag 2 in Physics

I got through just about all of the problems with the exception of this last one.

A water parcel of mass m and initial temperature 15 C falls over a waterfall that is 100m high. Calculate the change in temperature, change in specific entropy, and amount of energy per unit mass degraded during the fall.

I can calculate the change in entropy using the standard s = -dQ/dT relationship once I find the change in temperature. Where I'm actually stuck is figuring out how to calculate the change in temp. and the amount of energy degraded. Would I use the first law?

I asked this in the Physics category and someone said to use U = mgh and then to factor in the specific heat of water, but I'm not sure how I'm supposed to use that. Am I letting Q = mgh??? Then the masses would cancel and you'd get 980 = (4186)(T2-T1).

But Q is heating and U is gravitational energy. So I'm confused.

2006-11-07 14:49:12 · 1 answers · asked by JoeSchmo5819 4 in Chemistry

2006-11-07 14:48:48 · 5 answers · asked by oregoncheeto 3 in Weather

Tarzan swings on a 23.4 m long vine initially inclined at an angle of 32° from the vertical.

(a) What is his speed at the bottom of the swing if he starts from rest?

(b) What is his speed at the bottom of the swing if he starts with an initial speed of 2.28 m/s?

2006-11-07 14:46:34 · 4 answers · asked by tingerpoo 2 in Physics

just curiouse and i cant find it anywhere on google

2006-11-07 14:45:23 · 3 answers · asked by Peace Love Life :) 3 in Geography

2006-11-07 14:43:29 · 17 answers · asked by dirtykids3 1 in Geography

2006-11-07 14:42:37 · 4 answers · asked by Bow Chika Bow Wow 2 in Other - Science

science ... need help

2006-11-07 14:40:57 · 2 answers · asked by Anonymous in Biology

For the missile aimed to achieve the maximum range of 8500 km, what is the maximum altitude reached in the trajectory? Answer in units of km.

2006-11-07 14:39:59 · 3 answers · asked by Anonymous in Physics

my calculator only goes to 9 digits

2006-11-07 14:39:56 · 10 answers · asked by Anonymous in Mathematics

-12.4= -19.1 + n/-7.9 thanks.

2006-11-07 14:38:20 · 7 answers · asked by catmuffin 1 in Mathematics

2006-11-07 14:38:06 · 6 answers · asked by symperl 2 in Physics

2006-11-07 14:37:49 · 7 answers · asked by the shadow knows 3 in Zoology

An aluminum cube .15m on each side is completely submerged in water. What is the buoyant force on it? how does the answer change if the cube is made of steel? Data: density of aluminum=26.9g/cm^3, density of steel=55.8g/cm^3, and density of water=1.0g/cm^3


Please show the work
thanx for the help

2006-11-07 14:37:00 · 1 answers · asked by lubna h 1 in Physics

2006-11-07 14:34:58 · 10 answers · asked by T_Wright 1 in Astronomy & Space