Science & Mathematics - 23 October 2006

2006-10-23 16:14:56 · 4 answers · asked by monikaa_das d 1 in Mathematics

2006-10-23 16:14:17 · 10 answers · asked by beechwoodboris 2 in Astronomy & Space

A grinding wheel in the shape of a solid disk is 0.260 m in diameter and has a mass of 2.50 kg . The wheel is rotating at 2250 rpm about an axis through its center.
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If anybody could give me any hints I would really appreciate it. THANKS GUYS!!! :)

2006-10-23 16:12:29 · 4 answers · asked by cheezo12 1 in Physics

If the pH of 0.043 M BH+ is 6.44, find PKb for the weak base, B

2006-10-23 16:11:48 · 2 answers · asked by justjbk 3 in Chemistry

Consider an acid, HA, with pKa = 8.259. 0.129 moles of hydroxide ion are added to 13.83mL of a 0.931M solution of the acid. What is the resulting pH?

So I know pH = pKa + log([acid]/[base])

So really, how would I find the concentration of the base and the new concentration of the acid? If I have those, I can do the rest.

Thanks for any help!

2006-10-23 16:11:42 · 2 answers · asked by Anonymous in Chemistry

2006-10-23 16:09:25 · 6 answers · asked by Genesis 4 in Other - Science

In the Bible it says basically one day (human time) is as 1000 years with God. So if one day equals 1000 years, what would one half hour be? Anyone good at math that can figure this out?

2006-10-23 16:08:20 · 11 answers · asked by Anonymous in Mathematics

Jesus Christ is my Lord and Savior and can be yours too. Call upon the name of the Lord and Be saved! If you confess me before man, I will confess you to the Father. Repent for the return of the Lord is at hand.

Just say this simple prayer and get saved! (if you want to)
Dear Jesus,
I know that I am a sinner
I want to thank you for dying on the cross for me so I may be saved.
I ask you to forgive me and to come into my heart and Be my Lord and Savior for ever.
Thank you Jesus for saving me
I Love you
Amen!

Let me know if you excepted Him into your heart. He will forgive everything that you have done. why not start a new what is there to loose? you could explane that too if you have something to loose for excepting the God who saves.

2006-10-23 16:06:25 · 9 answers · asked by Kristenite’s Back! 7 in Medicine

solve the following system of linear equations:

x+y+3z=1
2x+2y+6z=2

Which one of the following statements best describes your solution:
A. There is no solution.
B. There is a unique solution.
C. There are 3 solutions.
D. There are infinitely many solutions with one arbitrary parameter.
E. There are infinitely many solutions with two arbitrary parameters.
F. There are infinitely many solutions with three arbitrary parameters.

ANSWER IS E

Enter your solution below. If a variable is an arbitrary parameter in your solution, then set it equal to itself, e.g., w = w.

x=
y=
z=

HOW DO U DO THIS SECOND PART AND WHAT IS X= please explain????

2006-10-23 16:04:58 · 3 answers · asked by Diggler AKA The Cab Driver 1 in Mathematics

The Reason I asked this question , I was doing a Family Research and you can only go back so far. I had to ask my self did we have ancestors when the Dinosaur walk upon this planet? Were they cave men and women ? It sound crazy but someone did not have a. great great great great great great great great great great great great great great grandmother or father . It might sound crazy but think about it you can only go back so far then what??????????/ I went back as far as the 1600,

2006-10-23 16:04:39 · 9 answers · asked by Anonymous in Other - Science

Can someone please explain to me how to do the following problem please?
The heat of combustion of C8H18 is 47.8 kJ/g and one gallon of C8H18 has a mass of 2620g. If a car using C8H18 is driven 10,000miles in one year and gets 25mpg of C8H18, what is the total energy consumption?

2006-10-23 16:03:22 · 1 answers · asked by foxtrot 3 in Chemistry

Assuming the lake is roughly heart-shaped and measures 250miles from left to right, 150miles from top to bottom, and is about 230ft deep.

2006-10-23 16:03:18 · 4 answers · asked by Yung 1 in Physics

2006-10-23 16:01:46 · 7 answers · asked by antoinekingcannon 1 in Astronomy & Space

2006-10-23 16:01:21 · 6 answers · asked by Anonymous in Chemistry

why or why not?

2006-10-23 16:01:02 · 6 answers · asked by popcorn 1 in Earth Sciences & Geology

Assuming all humans died out very soon. Died, not vanished. Obviously there will be permineralized skeletal remains. But I'm interested in what human fabrications would still exist in archaelogically useful forms.

2006-10-23 15:59:51 · 10 answers · asked by Anonymous in Earth Sciences & Geology

Okay so energy can't be created or destroyed it can only move from one form to another. So I have a full tank of gass (Chemical Energy) so when I'm driving that energy is transformed into kinetic to get me to wherever I'm going although some is lost in sound and thermal. Where do those energies go after that?

2006-10-23 15:58:52 · 3 answers · asked by K. Rhen Hunt 2 in Physics

2006-10-23 15:58:39 · 2 answers · asked by wolf 1 in Earth Sciences & Geology

Sqrt 29w + 71 - Sqrt 5x + 51 = 2
Where w is a REAL number
I cannot seem to put this in a form
with the Sqrt's to calculate..

2006-10-23 15:56:57 · 4 answers · asked by Anonymous in Mathematics

I was not sure what category under which to classify this question. This was the most logical I could find.

2006-10-23 15:53:48 · 18 answers · asked by Phyllobates 7 in Zoology

If I have a block that weighs 1 kg and a block that weighs 0.1kg, would the coefficient of static friction (max) change for the two?

2006-10-23 15:49:34 · 6 answers · asked by leikevy 5 in Physics

Working on project where I need to find a few select cities in states, provinces, and in various countries. I have searched and searched and only get either too specific of a map or too broad. Does anyone have any ideas of where to go for example: Houston and Robstown, TX; Edmonton and Medicine Hat, Alberta; Sicily, Italy, Duitsland, Germany; Norrkoping,Sweden and so on.....w/ various other city locations in various countries. Anyone know of any way to get this type of search going??? End result will be a global map showing ALL locations.....THANKS A BUNCH!!!!

2006-10-23 15:49:29 · 6 answers · asked by Anonymous in Geography

2006-10-23 15:49:05 · 5 answers · asked by chalupa1769 2 in Biology

having trouble getting my head around a good way of understanding how electronic current works in a basic circuit(a reisistror or light for example), any body have a good way of describing how it works?

2006-10-23 15:43:45 · 2 answers · asked by defender 1 in Other - Science

2006-10-23 15:41:53 · 3 answers · asked by jose u 1 in Mathematics

How do you draw a formation of a peptide bond with two amino acids in structural formation?

2006-10-23 15:40:38 · 5 answers · asked by Anonymous in Chemistry

2006-10-23 15:40:31 · 8 answers · asked by amartuvshin_orgil 1 in Mathematics

does concrete expand and contract?

2006-10-23 15:39:23 · 6 answers · asked by pete d 1 in Engineering

1) A human cell may have more or less than 46 chromosomes as a result of nondisjuncion, a process in which
a. chromosomes fail to separate during cell division.
b. a fragment of a chromosome breaks off and is lost.
c. homologous chromosomes pair up and exchange segments of DNA.
d. genes are combined in new ways.

2)How does cell division differ between animal and plant cells?
a. Plant cells don't have centrioles; animal cells do.
b. Animal cells form a cell plate during cytokinesis.
c. Animal cells are always haploid.
d. Plant cells are pinched in half by a belt of protein threads.

3)Meiosis results in new cells with the _____ number of chromosomes of parent cell. When the _____ from a mother and a father fuse in the process of fertilization, the normal chromosome number is restored.

4) Before mitosis takes place, a chromosome is copied, resulting in two unseparated copies called _____.

Could you help me with these questions? Thanks.

2006-10-23 15:39:01 · 3 answers · asked by =] 2 in Biology

A certain drug is made out of two compounds only: compound A and compound B. To make this drug, parts of compound A are used for every parts of compound B. If a chemist wants to make milliliters of this drug, how many milliliters of compound A are needed?

2006-10-23 15:37:11 · 5 answers · asked by Anonymous in Mathematics