Science & Mathematics - 6 August 2007

i have a bug that lookes like a chalcothea smargdina green beetle reel.its an inch long has curled feelers and green wings red and black legs red metalic head.

2007-08-06 04:26:08 · 2 answers · asked by Kristi S 1 in Zoology

Preparation

1. Mix thoroughly about 5grams of potassium chlorate with one gram of Mn Dioxide in a watch glass. Transfer the mixture into the ignition/generator tube. Heat the generator tube slowly. Allow few bubbles to escape before collecting oxygen into the test tubes. fill atleast 3 test tubes and cover with cork under water.

Properties
1. Uncork 1 test tube of oxygen and then insert a glowing splint. Observe
2. Place a small amount of S in the deflagrating spoon. ignite sulfur and tilt it into a test tube of oxygen. Take note of the odor of gas produced and add 5ml of water into the test tube. shake and test the sol with blue and red litmus. observe

3. ignite one end of strip Mg Ribbon and drop it into a test tube of oxygen. cool the tube and add 5ml of water. shake the mixture and test it with litmus paper, observe.

B. Preparation
1. How is O2 gas collected? Why could this method be done?
Describe the physical properties of O2?

2007-08-06 04:24:03 · 2 answers · asked by Daniel 1 in Chemistry

A gardener has 200 meters of fencing to enclose two adjacent rectangular plots what dimensions will produced a maximum enclosed area??



Could you please help me with this problem and please put your solution or an explanation on how did you get the answer

Thanks ^_^

2007-08-06 04:18:06 · 7 answers · asked by twowizdom 2 in Mathematics

2007-08-06 04:15:50 · 15 answers · asked by hadi 1 in Astronomy & Space

Please be specific with your work. Thank you.

2007-08-06 04:15:19 · 3 answers · asked by Anonymous in Mathematics

2007-08-06 04:14:53 · 4 answers · asked by Anonymous in Zoology

I'm not the best when it comes to math...........

When I go shopping and see the "sales" sign saying "75 %" off......how do I find the price to that



For example there are paire of boots that are 65 dollars and they are 75% off.

Can someone show me step by step to figure what the price will be if it is 75% off?

2007-08-06 04:13:00 · 8 answers · asked by Anonymous in Mathematics

I'm going to be a junior this year and I need a couple of liberal arts/elective ideas (I have 2 more I'm required to take). I was going to take elementary italian but the class time was changed, making it impossible. Any suggestions from those with a good experience? Anything that would be indirectly helpful to an electrical engineer, or just fun (and hopefully easy) to take? Please don't hesitate to list multiple ideas.

2007-08-06 04:11:43 · 3 answers · asked by Anonymous in Engineering

A. 1.8
B. 2
C. 2.2
D. 4

2007-08-06 04:02:40 · 6 answers · asked by Anonymous in Mathematics

F=GMm/(r^2), g=GM/(r^2), Gravitational potential energy= -GMm/r , gravitation potential= -GM/r.
With all these similar equations, how do you memorise it and apply it correctly when facing a physics question??? I get a bit confused whenever i see all the equations. I would like to ask the physics experts on ways to understand all these equations in a simpler way???
(i must say that i have not been coping well with this gravitational field topic in school due to its complicated equations)

2007-08-06 04:01:57 · 5 answers · asked by Lonelyz 1 in Physics

i mean like, would it suck u up if it went the other way? i dont CARE if i sound like a retard!!!

2007-08-06 03:55:42 · 5 answers · asked by Yum. 3 in Physics

ok i want to buy this bag on the internet and it says its 17'' x 4'' x 17'' so like is tht

17''=lenght
4''=width
17''=height
??????

becuz i want to know how big it is....

2007-08-06 03:54:54 · 3 answers · asked by PrincessA 6 in Mathematics

why is it that those with restrictive disease can exhale 80% or more of FVC even though their FVC is reduced? and for those with obstructive pulmonary disease they exhale less than 80%? Thanks.

2007-08-06 03:53:41 · 2 answers · asked by freezerfairy 1 in Medicine

Two moons on August 27, 2007
>
>*27th Aug the Whole World is waiting for.............*
>
>
>Planet Mars will be the brightest in the night sky
>starting August.
>
>It will look as large as the full moon to the naked
>eye. This will cultminate on Aug. 27 when Mars comes
>within 34.65M miles of earth. Be sure to watch the sky
>on Aug. 27 12:30 am . It will look like the earth has
>2 moons. The next time Mars may come this close is in
>2287.
Is anyone else going to watch this beside me and what do you think about this? Has there ever been life on Mars??

2007-08-06 03:45:53 · 23 answers · asked by trenbolone 2 in Astronomy & Space

In an apple orchard there are 30 trees per acre, and the average yield per tree is 400 apples. For each additional tree planted per acre, the average yield per tree is reduced by 10 apples. How many trees per acre will maximize the crop?

What's the equation for yield per acre?

What's the derivative?

What's the optimum number of trees?

2007-08-06 03:43:47 · 1 answers · asked by Anonymous in Mathematics

A parallelogram has consecutive side lengths of 9 and 7 and diagonals of integral lengths. How long are these diagonals?
Please show work!!!

2007-08-06 03:41:29 · 3 answers · asked by i'MdAmAnn 2 in Mathematics

How do they determine the meteorites origon and what knocked them off the planet or sattilite anyway?

2007-08-06 03:34:33 · 3 answers · asked by Anonymous in Astronomy & Space

I'm just beginning to work with derivatives, and I've only done problems that are "1 step," and by that I mean, it's only multiplication, only division, only addition, etc. I'm not sure how to do this 2-step one using the product rule. So can you please explain as thoroughly as possible with WHAT you're doing and WHY you're doing it? THANK YOU SO MUCH!!!

Differentiate f(x) = x(x² - 3)(x³ + 1)

2007-08-06 03:26:54 · 4 answers · asked by Happy 3 in Mathematics

2007-08-06 03:14:34 · 7 answers · asked by kath_leenss 2 in Chemistry

A baseball player dives into third base with an initial speed of 7.9 m/s. If the coefficient of kinetic friction between the player and the ground is .41, how far does the player slide before coming to rest?

2007-08-06 03:13:37 · 4 answers · asked by Waverly Pascale 3 in Physics

the answer is x=4 and y=5 but i want complete logical solution.

2007-08-06 03:13:10 · 4 answers · asked by Anonymous in Mathematics

2007-08-06 03:11:25 · 3 answers · asked by tcroxas1995 2 in Other - Science

like in a leaf when the dew drops fall frm it falls like a pearl round in shape is it something related wit density of air or pressure of air plz explain

2007-08-06 03:09:37 · 11 answers · asked by varshithatp 2 in Physics

I have heard on the news that sooner or later, we all will be required to donate our organs when we die. As before we had the choice to do this.
Do you agree with this or disagree?

2007-08-06 03:08:14 · 17 answers · asked by Poppy 2 in Medicine

I need help writing and balancing 2 neutralization reactions
I need 5 acid combinations

If anyone could help that would be great.

2007-08-06 03:08:01 · 2 answers · asked by Anonymous in Chemistry

Factorize:

Formula: a^2 - b^2 = (a+b)(a-b)

a^2 - a^2b^2 - 2ab - 1

2007-08-06 03:07:47 · 3 answers · asked by Niranjana S 2 in Mathematics

2007-08-06 03:03:04 · 2 answers · asked by svly 1 in Physics

Factorise:

formula:a^2 - b^2 = (a+b)(a-b)

x^4+4

2007-08-06 03:02:20 · 2 answers · asked by Niranjana S 2 in Mathematics

2007-08-06 03:01:19 · 4 answers · asked by svly 1 in Physics

factorize this sum:

xy^5 - x^5y

It will be easier for me if u answer it with this formula:
a^2 - b^2 = (a+b)(a-b)

2007-08-06 02:59:35 · 6 answers · asked by Niranjana S 2 in Mathematics