Science & Mathematics - 30 September 2007

I was just wondering if it's worth the money ? Is there anyone who has taken it and have you noticed any results from taking it ?

2007-09-30 05:03:03 · 1 answers · asked by Mary K 2 in Medicine

Options are 1. The use of rubber tyre vehicles 2. Humidification process

2007-09-30 05:02:06 · 4 answers · asked by shailesh p 1 in Engineering

speed of 5.0m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 25 degress when they move past the window, as the drawing shows. How fast is the train moving?

2007-09-30 05:02:03 · 1 answers · asked by Anonymous in Physics

Ladies and Gentlemen:
I am the proud owner of a Meade 6 Inch Refractor Telescope.
The focal length of this telescope is 1219 mm. I have an
assortment of eyepieces ranging down to 5 mm. I know how
to calculate the Magnification Power FL/EP Size = Mag Pwr.

What I am not sure of and am asking experienced users is:

In the process of upgrading my EP Stock to TV Radians and TV Naglers, along with Power Mate 2X and 4X, what do you
think is the highest reasonable Mag Power I should seek with a real expectation of producing a good clear view? A fuzzy blob is no fun to look at.

I appreciate all comments from experienced telescope users.

2007-09-30 04:58:51 · 3 answers · asked by zahbudar 6 in Astronomy & Space

1. A mixture of helium and neon gases is collected over water at 28.0 °C and 745 mmHg. If the partial pressure of helium is 368 mmHg, what is the partial pressure of neon? (Vapor pressure of water at 28 °C = 28.3 mmHg.)


Dry air near sea level has the following composition by volume: N2, 78.08 percent; O2, 20.94 percent; Ar, 0.93 percent; CO2, 0.05 percent. The atmospheric pressure is 1.00 atm.


Calculate the partial pressure of each gas in atm.
a Partial pressures: N2 =0.781 atm; O2 = 0.209 atm; Ar = 9.3 × 10-3 atm; CO2 = 5 × 10-4 atm
b Partial pressures: N2 =78.1 atm; O2 = 20.9 atm; Ar = 0.93 atm; CO2 = 0.05 atm
c Partial pressures: N2 =78.1 atm; O2 = 20.9 atm; Ar = 9.3 × 10-3 atm; CO2 = 5 × 10-4 atm
d Partial pressures: N2 =0.0781 atm; O2 = 0.0209 atm; Ar = 9.3 × 10-4 atm; CO2 = 5 × 10-5 atm

2007-09-30 04:58:24 · 1 answers · asked by PiNk-PrInCeSs 3 in Chemistry

So the question is 1/2+1/d-2=d/16

First person to answer the question correctly gets 10 points. Thanks.

2007-09-30 04:57:29 · 3 answers · asked by John D 2 in Mathematics

Hi. for std'zation of Na2S2O3, KIO3 primary std was used. but i just dont get it why KI is added. and also H2SO4. please explain why? and also specifically, in the experiment we added the acid before the KI. why? and the effect if KI is added first? (in other websites i read that some added KI first...its so confusing)

2007-09-30 04:56:56 · 3 answers · asked by benjediman 2 in Chemistry

2/w = x/5. explain the solution to me step by step

2007-09-30 04:55:36 · 10 answers · asked by rene w 2 in Mathematics

How many teaspoons equals 5mls?

2007-09-30 04:53:55 · 7 answers · asked by Anonymous in Medicine

Write the molecular equation for the reaction of solid barium carbonate and hydrogen bromide in aqueous solution. Add phase labels. Also, write the net ionic equation adding phase labels.

2007-09-30 04:53:18 · 1 answers · asked by Joe C. 1 in Chemistry

I know this sounds like an odd question, but it's for a science project. Can anyone help me out?

2007-09-30 04:53:00 · 4 answers · asked by heather 2 in Botany

Consider a droplet with radius R and charge Q, and it breaks into two droplets with charges Q/2 and radius R'. They repel each other to a distance much greater than R'. What is the loss of electrostatic energy.

This problem really confuses me. My best understanding is the work to make the configuration of the smaller droplets is the engery loss. Yet, the seperation goes from zero to some distance d where d >> R'. I was just thinking what if a calculated the work it took to take one of these particles from infinity to a distance d from the other charge...

Is that the same amounto of energy?

2007-09-30 04:48:37 · 2 answers · asked by Anonymous in Physics

81-t * 9 – root t
----------
9 – root t *9 – root t
=
81 – t (9 – rt t)
-------------------
81 – t
81 – t (9 – rt t) / -81
-------------------
81 – t / -81

81 – 9 – rt t
-------------------
81
/ -rt t
=9- rt t

where did i go wrong?

2007-09-30 04:46:22 · 2 answers · asked by Ar J 2 in Mathematics

e^ {[x-1]/2}

2007-09-30 04:42:06 · 2 answers · asked by Chocolate Strawberries. 4 in Mathematics

2007-09-30 04:40:34 · 1 answers · asked by akshaya s 1 in Earth Sciences & Geology

If ax2+bx+g with a not 0 and abg belong to real numbers(R) and dont have solutions in R can you prove that for xy(R)
(ax2+bx+g)(ay2=by+g)>0

2007-09-30 04:40:18 · 1 answers · asked by baby 3 in Mathematics

a. a question
b. a result
c. an observation
d. a prediction
e. a hypothesis

2007-09-30 04:34:12 · 2 answers · asked by . 6 in Biology

2007-09-30 04:32:57 · 15 answers · asked by waseem M 1 in Biology

They both seem the same thing to me, but certainly they are not. Could please someone explain the difference.Thanks

2007-09-30 04:31:05 · 1 answers · asked by donovan 1 in Engineering

1) Write the equation of the line with a slope of -1/3 and passing through the point (6, -4).
2) Write the equation of the line passing through the points
(-6,1) and (-4,2).

2007-09-30 04:29:16 · 3 answers · asked by princess 1 in Mathematics

I need this answer pronto.

2007-09-30 04:28:22 · 2 answers · asked by Bubbles 1 in Earth Sciences & Geology

What is the weather right before a tornado? I mean, is it true that it gets all quiet and then the wind begins picking up? Can someone describe it very detailed? I need to know, please help me!

2007-09-30 04:27:44 · 2 answers · asked by Paul 1 in Weather

Im interested in this feild and looking for answers for why we exist. Id like to know more about it. do you know where i can get information on this.

2007-09-30 04:26:57 · 3 answers · asked by Joann 3 in Physics

2007-09-30 04:26:06 · 3 answers · asked by trtrsshtr 1 in Geography

Solve the linear inequality. Other than Ø, use interval notation to express the solution set and graph the solution set on a number line.

4x + 3 < 39

a. [9, ¥)

b. (9, ¥)

c. (-¥, 9]

d. (-¥, 9)

2007-09-30 04:22:26 · 2 answers · asked by Anonymous in Mathematics

How would I research this question?! Where did you get your information from?!

2007-09-30 04:22:03 · 9 answers · asked by ThisGuyRules 3 in Astronomy & Space

2007-09-30 04:13:32 · 1 answers · asked by miha 1 in Chemistry

A foul ball is hit straight up into the air with a speed of about 18 m/s.
(a) How high does it go?
(b) How long is it in the air?

2007-09-30 04:11:43 · 1 answers · asked by hahahahahaha 1 in Physics

any websites based on it????

2007-09-30 04:10:02 · 1 answers · asked by Anonymous in Other - Science

Those are Relativity, Quantum Mechanics, String Theory, Loop Quantum Gravity....Can someone please delve a little deeper in the last two given that I understand mostly anything about them.....and in String Theory how is it that it is able to merge Relativity and Quantum Mechanics if they are almost opposite in some aspects.

2007-09-30 04:06:52 · 2 answers · asked by feelingtherain 2 in Physics