All categories - 1 November 2007

Question 1:
Drill a hole all the way down to a depth 0.5 metre above the centre of earth. For that we need a long casing to stop sloughing and ground water into the hole. This is an ideal closed end casing which is strong enough to withstand high pressure and temperature inside the earth. Now put a sphere of 1 kg mass of 1 metre diameter at/ on the base of hole. The distance between the centre of the earth and the centre of the sphere is 1 metre.

Now apply the same universal law of gravitation to the two masses. Can I calculate the value of “g” (as Newton drive for his equation on the surface of the earth ) at this point by the following equation.

F = G M m/R^2 g = GM/R^2 , Where R = 1 metre, therefore R = GM, g= 3.98 x 10^14 m/sec^2. So Weight of this mass at o.5 metre above centre of earth =mg = 3.98 x 10^14 N. If not, please explain and why g = 10.7 m/sec^2 in inner core?

Question 2:
Now push the casing further down and past the centre of earth by half a metre. Now Again put a sphere of 1 kg mass of 1 metre diameter at/ on the base of shaft such that the centre of the earth and the centre of the sphere coincides. (Just like white and yolk of boil egg)
Apply the same universal law of gravitation to the two masses. What will be the value of “g” and the gravitational force?
F = G M m/R^2 g = GM/R^2 , Where R = zero metre, therefore g= 0 m/sec^2 or infinity & F=zero or infinity
If not, please explain why?

What is the value “g” at the centre of gravity of the earth?

Question 3:

Now push the casing further down and past the centre of gravity of earth by one km. Now remove the sphere and drop a stone from ground surface or the top of casing. So where will be the resting position of stone, centre of gravity of the earth or at the base of hole?

2007-11-01 13:15:16 · 3 answers · asked by ? 3 in Astronomy & Space

2007-11-01 13:15:00 · 2 answers · asked by Anonymous in History

2007-11-01 13:14:55 · 2 answers · asked by Anonymous in Economics

I was told I got up and started walking around the house talking about baseball (I don't even like watching sports). I even got something to drink and I do not remember a thing of it.
What are some stories of you sleep walking or talking?

2007-11-01 13:14:44 · 10 answers · asked by Anonymous in Polls & Surveys

What were some of the examples of the relationships (adults, children,etc) in tkm?

2007-11-01 13:14:39 · 7 answers · asked by Anonymous in Homework Help

2007-11-01 13:14:32 · 24 answers · asked by Anonymous in Polls & Surveys

Chic and Co.

or

Classique Vintage

2007-11-01 13:14:25 · 11 answers · asked by Mrs. Smith 2 in Polls & Surveys

Who is the scariest?
http://youtube.com/watch?v=sprzyvRhVQM

2007-11-01 13:14:18 · 16 answers · asked by . 6 in Polls & Surveys

2007-11-01 13:14:07 · 0 answers · asked by lucky888☺ 4 in Movies

Captain Hook loved number puzzles. He left one such puzzle on Algebra Island,where he buried his magic treasure. The puzzle read:
Get ye to the palm tree at the middle of the isle. Face ye to the west. Think ye of the
number that is seventeen more than the quotient when six times the number of paces to
the treasure is divided by two. This number be equal to the sum when twelve more thannine minus fifteen is added to four times the number of paces to the treasure. Dig ye
only once, for if ye dig in the wrong spot, the treasure will disappear.How many paces should you take?

2007-11-01 13:14:07 · 3 answers · asked by J 3 in Mathematics

I'm a bit confused on how to use the indirect proof.
The problem is: "=" : BIconditional and

~(p≡q) conditional [(p conditional q) conditional ~ (q conditional )]

THANKS

2007-11-01 13:13:58 · 1 answers · asked by Anonymous in Mathematics

i have a NIV study Bible that has lots of notes and captions, and the language is also simple for me to understand. is this an okay Bible to be using, is it God breathed?

2007-11-01 13:13:56 · 13 answers · asked by <>< captivated 1 in Religion & Spirituality

2007-11-01 13:13:53 · 20 answers · asked by *Fletch* 5 in Polls & Surveys

A friend of mine who used to be catholic and is now a born-again Christian told me about this. She is mexican and has a lot of mexican friends who are catholic - she witnesses to them regularly.
She told me that some of the catholic members are turning away from saint worship and mary worship and beginning to just focus on Jesus! Praise God! Anyway, some of the catholics are completely against this and have even had parades to honor mary - with mary shirts that have rosaries on them. I saw the shirt with my own eyes.
Had anyone heard of this? I think that many catholics are beginning to open their eyes!

2007-11-01 13:13:52 · 17 answers · asked by Suzi♥Squirrel 4 in Religion & Spirituality

I have a good amount of caffeine in the morning (it's the only way I can get through the day) and I don't get hungry for a couple hours, but then around 11 or 12 I get severe hunger pains, it comes on suddenly and it seems like no matter how much I eat I am still hungry!

What can I do about this (without losing the caffeine)?

2007-11-01 13:13:46 · 1 answers · asked by Diamonds_4Ever 3 in Diet & Fitness

converts to energy each second.

2007-11-01 13:13:43 · 2 answers · asked by jawaiian103 1 in Astronomy & Space

2007-11-01 13:13:43 · 16 answers · asked by Anonymous in Polls & Surveys

Do they really have taxi's sitting in front of the hotels in case I decide I need to go somewhere? Can I just hop in one and tell them where to go? How much does a taxi cost?
How tall is the Sax hotel in stories?
Where is the best place to eat?
Is the Shedd Aquarium open next weekend and how much does it cost?
Thanks!!!!

2007-11-01 13:13:37 · 3 answers · asked by happydawg 6 in Chicago

I've never done it before. There was a stock broker who told me one time that there are stocks that can be bought for $100. Is that true? How much do you think it would generate?

2007-11-01 13:13:32 · 5 answers · asked by openupfresh 1 in Investing

But if Obama said he wants to end the "white club of Presidential politics" he using the race card?

2007-11-01 13:13:30 · 7 answers · asked by Anonymous in Elections

I just started doing it for exercise. I haven't done it in years.

2007-11-01 13:13:29 · 6 answers · asked by Anonymous in Other - Outdoor Recreation

President ?
Someone that will put America Citizens and the country first .
Or will the Media and Special Interest groups drum them out before they have a chance to be known because they go against their lobbying ?

2007-11-01 13:13:26 · 8 answers · asked by Anonymous in Politics

how can i make it better

2007-11-01 13:13:23 · 14 answers · asked by Anonymous in Psychology

2007-11-01 13:13:23 · 14 answers · asked by hi O__o 3 in Politics

My boyfriend.
I love him so much. I just can't take what he's been doing to me. He tells me he loves me and that he'd die if we broke up. Tells me he wants to be with my forever and get married, and all this nice stuff. Tells me i'm pretty, and beautiful.. He's perfect.

Except for he lied to me already about a girl that he was hugging i told him the first time he didn't that it made me feel bad.. and to please not do it again.. i don't care if he was friends with her just don't flirt.. and hug. So, a couple days later my best friend tells me he was huggin her again and saying oh i feel so sorry for all she's going through and he lied and said he didn't do it.. then he finally said he did.. i can't take people who lie.. i was like you can't do this to me..


today.. i found out that yesterday my friend had a halloween party and i went and i told him that she invited him that we could go together but he was sick so he said he'd just call me later that night and then my friend told me that he invited 2 girls with him and his friend, and then his friend invited his girlfriend and 1 other girl.. this one girl was hanging all over him.. he lied to me.. again, and said he was sick and now he just went with them.. and didn't invite me.. or tell me he was leaving..

whenever this happens and i'm really sad he said he's gonna kill himself if we break up.. whenever something like this happens he cuts too.. and i told him to stop and he's tried.. but he still does it..


please give me advice..

i really need help.. i feel like crap.

Thank you so much.

2007-11-01 13:13:22 · 4 answers · asked by Anonymous in Singles & Dating

The circumference of a sphere was measured to be cm with a possible error of cm. Use differentials to estimate the maximum error in the calculated surface area.

Estimate the relative error in the calculated surface area.

Hint: The circumference of a sphere of radius r is , and its surface area is . Eliminate first!

2007-11-01 13:13:20 · 1 answers · asked by samantha 5 in Mathematics

Please could you help me with this? and show me how you got th answers too,?
I do know that you have to plug in the variable for the value for one (x or y ).
Use elimination to solve each system of equations.

5.) 3x-4y=6
2x+3y=3

6.) 3x-5y=1
2x+3y= -12
use substitution or elimination to solve these system of equations-

7.) x+y=13
2x-3y=1

8.) 9x+2y=5
3x-y= -10

9.) 2x+y=1
x=5+y

10.) x= -8y
2x-3y=1

11.) 2x+4y=12
-3x+3y=63

12.) 5x-2y= -1
3x-y= -2

13.) Bill leaves his house for Ashley's house riding his bicycle at 8 miles per hour. At the same time, Ashley leaves her house heading toward Bill's house at 3 miles per hour.

a.) write a system of equations to represent the distance, d, each is from Ashley's house in h hours. They live 8.25 miles apart.

b.) Solve the system to determine how long they travel before meeting.

2007-11-01 13:13:18 · 2 answers · asked by Madeline the Bard 3 in Mathematics

Mine was my ipod.

2007-11-01 13:13:18 · 11 answers · asked by star 4 in Polls & Surveys

2007-11-01 13:13:17 · 16 answers · asked by cats 7 in Polls & Surveys

I need help,
Explain the surface circulation of the south Pacific Ocean and how it changes during an El nin event.

2007-11-01 13:13:12 · 2 answers · asked by Karla Chokes Babies 1 in Weather