Science & Mathematics - 19 September 2006

a.$1,953.00 b.$1,943.00 c.$1,923.00 d.$1,963.00

2006-09-19 03:13:48 · 3 answers · asked by Tony R 1 in Mathematics

2006-09-19 03:13:31 · 7 answers · asked by ash 1 in Astronomy & Space

2006-09-19 03:12:26 · 4 answers · asked by pacific_flyway 2 in Weather

1: Which element is the most abundant on earth?
Water, (H2O)

Hydrogen, (H2)

Oxygen, (O2)

None of the above


2: Oxygen is a diatomic element which means that 2 atoms of oxygen combine to form an oxygen molecule, (O2). The number 2 in (O2) means that this oxygen molecule has _______________.
two atoms of oxygen

two atoms of water

two atoms of hydrogen

none of the above


3: Water, (H2O), contains Oxygen and Hydrogen. The oxygen in water, (H2O) does not have a subscript, which means 1 is understood and there is only 1 oxygen atom in a molecule of water (H2O). Please answer the following: How many Hydrogen atoms are there in a molecule of water, (H2O)?
1

2

3

4


4: Since we are talking about (H2O), it will be important for you to know that hydrogen (H2), like Oxygen (O2), is also diatomic. Which of the following molecules are diatomic?
Fluoride, (F2)

Chlorine, (Cl2)

Nitrogen, (N2)

all of the above


5: A molecule of water, (H2O), is the smallest amount of water that can exist and still retain all the properties of water. H2O represents 1 molecule of water because a number 1 is assumed to be in front of the H. Which of the following represents 1 molecule?
Nitrogen, N2

Chlorine, 2Cl2

Fluoride, 3F2

none of the above


6: 3F2 consists of 3 molecules of F2 (Fluoride) because there is a 3 in front of the F2. Given: S2, how many molecules of Sulfur are there?
1

2

3

4


7: Given: KI, potassium iodide. How many molecules of potassium iodide are there?
1

2

3

4


8: In the preceding problem you were given the chemical formula for potassium iodide, KI. Please notice that in the compound KI, there is no space typed between the K and the I. Based on your understanding of this new language you are learning, please choose the compound from those listed below that represents 2 molecules of sodium chloride, which is table salt, symbolized as NaCl:
NaCl

2NaCl

3NaCl

none of the above


9: How many molecules are there in 3NaBr?
1

2

3

none of the above


10: The chemical formula for Ozone is O3. Please determine the number of molecules in the following amount of ozone, 5O3.
1

2

4

5


11: Matter can exist in three states: Solid, Liquid or a Gas. Is the oxygen, O2 that we come into contact every day, a solid, liquid or a gas?
O2 is a solid

O2 is a liquid

O2 is a gas

none of the above


12: Water, H2O, commonly exists as a solid, a liquid, or a gas. The air we breathe contains N2, O2, water vapor and a few trace elements. When there is a lot of water vapor in the air, we say that the weather is humid. How many water molecules are in 10 H2O?
5

10

15

20

2006-09-19 03:08:53 · 7 answers · asked by Anonymous in Chemistry

2006-09-19 03:08:00 · 10 answers · asked by Anonymous in Other - Science

Is it true that sounds do not get lost but wander in universe? Are there any valid theories in physics which give an explanation to what happens to sounds after we produce them?

2006-09-19 03:06:37 · 3 answers · asked by Earthling 7 in Physics

Isn't it true that humans actually have bodies more suited for eating and digusting vegatables rather then meat?? Like for instance our teeth.

2006-09-19 03:05:53 · 5 answers · asked by Aquamarine 4 in Biology

2006-09-19 03:03:53 · 14 answers · asked by Anonymous in Other - Science

2006-09-19 03:03:37 · 23 answers · asked by ladypersephone21 3 in Zoology

from Omaha, Nebraska to Baltimore, Maryland (which is 1138 miles) if they are going an average human pace?

Heh. I'm bored.

2006-09-19 02:58:28 · 5 answers · asked by Alicia 2 in Mathematics

My physics teacher put this up on the forum for fun discussion. Here's my reply

No. As long as by acceleration you mean total acceleration in the vector. (I went on to explain using gravity and a rocket, but that won't fit in here)

He replied with

Think about a v vs. t graph that is not a straight line (recall that the slope of this graph represents the acceleration). Suppose from t= 0s to t= 3s the line is roughly straight and has a slope of 4. Then, from t= 3s to t= 6s, the line is again roughly straight but has a different slope of 2. Is the speed still increasing after t= 3s?

I say, yes the speed is increasing after t=3s (a=2) but what about at t=3s? there is obviously a negative acceleration there, but at that point surely the velocity is not still increasing because for the object to slow it's total acceleration must be negative. What do you think?

Greg

2006-09-19 02:55:22 · 13 answers · asked by Greg C 2 in Physics

A number of scientific truths that we have only been able to uncover by the technology of the 20th century were stated in the Qur'an 1,400 years ago.

These many modern amazing scientific truths are :-

1-Human Embryonic Development

2-The pegs of the mountains

3-The end of the Heaven

4- The Origin of the Universe

5- The Sun's Resting Place

6- The Miracle in the Iron

7- Formation of Clouds

8- The different between the Stars and Planets

9- Botany

Just see it yourself with more miracles on this website

http://www.jalyat.net/

BUT you have to read honestly.

2006-09-19 02:54:19 · 12 answers · asked by Anonymous in Earth Sciences & Geology

2006-09-19 02:51:58 · 22 answers · asked by Pronkville 3 in Astronomy & Space

With some info about them

2006-09-19 02:51:28 · 3 answers · asked by Anurag R 1 in Botany

2006-09-19 02:48:11 · 11 answers · asked by Anonymous in Astronomy & Space

2006-09-19 02:48:04 · 2 answers · asked by mr. gray 1 in Engineering

i was always under the impression that snails cannot live without their shells. is it true that snails become slugs if their shells get removed? if not, do they die if their shells get removed?

the lyrics in They Might Be Giants' song 'Snail Shell' prompted this question.

2006-09-19 02:47:49 · 9 answers · asked by [177] 3 in Zoology

2006-09-19 02:47:05 · 3 answers · asked by amazing_sweet_angel 1 in Biology

ok, i have 2 questions, which out of 10 i cannot answer.
1] decribe the bonding arrangement in the benzene ring.
2]what role do delocalised electrons play in the bonding arrangement?
i really need help on these two questions, if you can help, much appreciated. thanks

2006-09-19 02:44:05 · 4 answers · asked by Anonymous in Chemistry

2006-09-19 02:43:50 · 13 answers · asked by khanadik_ericson 1 in Mathematics

i am physics mad ! r u too ? i love to go in details

2006-09-19 02:42:14 · 4 answers · asked by catty 4 in Physics

What size is the biggest meteorite ever found and where? In which country are you most likely to find a meteorite ?

2006-09-19 02:41:30 · 9 answers · asked by Anonymous in Earth Sciences & Geology

(BIG)/(JOKE) = 0.HAHAHAHAHA... (repeating)

BIG is a three digit number
JOKE is a four digit number
0.HAHAHA... is a repeating decimal with two repeating digits

Replace each letter using each of the numbers 1-9 only once such that the equation holds true.

I had solved this once before back in high school, but my solution was not very elegant. I cleverly eliminated a very large amount of the possibilities and began guess/checking on the remaining possibilities with a calculator. I am just curious if there is a more elegant solution.

Oh, and there are multiple solutions that will work (around 4 or 5 if I remember right).

2006-09-19 02:37:34 · 2 answers · asked by Ubi 5 in Mathematics

please help me. I kind of need it now.

2006-09-19 02:35:27 · 5 answers · asked by cheese 2 in Zoology

2006-09-19 02:30:50 · 29 answers · asked by Anonymous in Biology

Use theory of indices.
Please help!!!!!!!!!!!!!!!!!!!!!!!!

2006-09-19 02:30:00 · 10 answers · asked by rinky 3 in Mathematics

2006-09-19 02:29:16 · 41 answers · asked by Glori 1 in Biology

Is it analogous to the spin velocity of the earth and its Quasi equilibrium spin energy?

2006-09-19 02:27:41 · 3 answers · asked by goring 6 in Physics

Ok I work for my city as a park aid. So I was finding all these fuzzy catipilers and from what I know they are called wolly bears. What I wanted to know is about their colors. They are blake then brown then black again. Does the length of the brown mean anything. I heard that how ever long the brown was ment how long and harsh the winter was going to be.

2006-09-19 02:25:17 · 3 answers · asked by Anonymous in Other - Science

2006-09-19 02:23:47 · 7 answers · asked by alexissitaropoulos 1 in Physics