Science & Mathematics - 5 October 2007

2007-10-05 15:38:34 · 11 answers · asked by jai.pressure1 1 in Astronomy & Space

A ball of radius 12 has a round hole of radius 9 drilled through its center. Find the volume of the resulting solid.

2007-10-05 15:37:11 · 2 answers · asked by Anonymous in Mathematics

2007-10-05 15:36:52 · 2 answers · asked by Brandon F 1 in Mathematics

and jumps really fast.

2007-10-05 15:30:55 · 3 answers · asked by Anonymous in Zoology

which of the following solutions is the most basic?
a.) 0.5 M NH3
b.) 0.1 M KOH
c.) 0.1 M Ca(OH)2

i think that both b & c are strong bases, but i dont know how to compare them. also, i kow that nh3 is a weak base, but does concentration have anything to do with it?? i dont get this problem?
thanks for any help
ps- i should be out at a dumb party getting wasted but im here doing ap chem. you want my life.

2007-10-05 15:30:04 · 3 answers · asked by Anonymous in Chemistry

heaven? hell? another demension?

2007-10-05 15:29:02 · 12 answers · asked by Anonymous in Astronomy & Space

The element chromium has four naturally occurring isotopes. Use the relative abundance of each to calculate the average atomic mass of chromium.

Cr = 4.34%, Cr = 83.79%, Cr = 9.50%, Cr = 2.37%.

im not sure how i would do this without being given the masses! any help?

2007-10-05 15:28:45 · 3 answers · asked by nikki 2 in Chemistry

2007-10-05 15:28:33 · 2 answers · asked by anrtech 1 in Chemistry

2007-10-05 15:28:04 · 1 answers · asked by isabel l 1 in Physics

Let a and b be elements of a group G. Assume a is not equal to e, |b| =2, and bab^-1 = a^2. How can I find |a|??

2007-10-05 15:16:51 · 2 answers · asked by Anonymous in Mathematics

1)19 + (-8h + h)
2) 2w(8w =15)

only simplify is needed (impossible to solve anyways)

thnx!

2007-10-05 15:11:14 · 3 answers · asked by <3 3 in Mathematics

2007-10-05 15:09:50 · 6 answers · asked by dmmdmustang 2 in Weather

2007-10-05 15:09:13 · 6 answers · asked by sixthstring 2 in Mathematics

holiday maths homework but have no idea what to do.

3x + y = 2
4x + y =6

the book says: "Eliminate one variable by adding or subtracting the equations and hence solve the simultaneous equation".
what the hell is a variable!!

2007-10-05 15:07:47 · 7 answers · asked by St Darling ♥s Pantera 5 in Mathematics

2007-10-05 15:00:54 · 2 answers · asked by carobygirl 6 in Zoology

A company by the name of VeriMed has manufactured microchips ready to be embedded into the arms of people with Alzheimers. These chips "supposedly" only contain info. such as address, medical info, name and so forth. They "supposedly" do not have a GPS device in them. Do you think this is a good idea, and, would you approve of this chip being implanted in one of your relatives with Alzheimers?

2007-10-05 14:53:11 · 6 answers · asked by Virginia B (John 16:33) 7 in Medicine

Any scientific data available?

2007-10-05 14:39:59 · 18 answers · asked by james h 2 in Astronomy & Space

In calculus, is there a way to see if the derivative and the second derivative are correct either by graphing or using the calculator? i can find the derivative rather easily but is there a way to make sure i did it correctly?please help

2007-10-05 14:36:13 · 4 answers · asked by maxpowerrys 1 in Mathematics

If 7000 dollars is invested in a bank account at an interest rate of 5 per cent per year, compounded continuously. How many years will it take for your balance to reach 20000 dollars?

2007-10-05 14:34:56 · 3 answers · asked by RedSparkle 1 in Mathematics

Hey my science question is ............
Does Scary Movies Cause Nightmares???/
Please. Help. Me. Any Info, Comments, Or Anything Would Help. Thanks.

2007-10-05 14:33:17 · 2 answers · asked by Anonymous in Other - Science

How are fossil fuels formed?

2007-10-05 14:29:14 · 1 answers · asked by james h 2 in Chemistry

what is the purpose ok green chemistery

2007-10-05 14:26:55 · 1 answers · asked by bro_in_my d 1 in Botany

You see, I have to build a device to project as many marbles as possible into a basin 12 in in diameter and 4 in high, that is placed 10 ft away from me. There is a limit of 60 seconds for me. I can only use one marble at a time, the device cant be hand-held. Now, I bought a Hot Wheesls V Drop Super Velocity Set: http://www.walmart.com/catalog/detail.gsp?image=http://i.walmart.com/i/p/00/02/70/84/30/0002708430781_AV_60X60.gif,http://i.walmart.com/i/p/00/02/70/84/30/0002708430781_500X500.jpg,http://i.walmart.com/i/p/00/02/70/84/30/0002708430781_AV_60X60.gif,http://i.walmart.com/i/p/00/02/70/84/30/0002708430781_AV1_60X60.gif&product_id=5691446&iIndex=2&isVariant=false&corpCard=false&type=0, and I used its track as a track for my marbles. The only problem is that I cannot make my marbles go 10 ft! AND, I tried every combination possible with height and weight of the track. Help or tips are welcome.

2007-10-05 14:26:55 · 2 answers · asked by inna2507 2 in Physics

2007-10-05 14:23:23 · 4 answers · asked by texan3715 1 in Mathematics

What is the parametric equation for a rectangle? Thanks

2007-10-05 14:22:05 · 2 answers · asked by Anonymous in Mathematics

If I have a building that is 13,000 sq. feet and a building that is 5,880 sq. feet, what is the percentage difference? Or shall I say the percentage decrease? How do you do this?

2007-10-05 14:18:42 · 4 answers · asked by momfirst 1 in Mathematics

A broken leg is supported in the traction apparatus shown. If the hanging mass has a value of M = 23.5 kg, (a) what is the tension T1 in the rope, and (b) what is the total force F applied to the leg?

(a) T1 = 231 ± 3.0% N

(b) F = 399 ± 3.0% N

how do they get the answer for A

there is also a picture and here it is
http://img76.imageshack.us/my.php?image=traction0br9.jpg

2007-10-05 14:18:02 · 1 answers · asked by XLR8 2 in Physics

My grandson, my son [his father] and i share the same birthday . Tis year i remarked to my son " you know of course that today all three of our ages have become prime numbers. But did you realize that for the last17 years prior to this year whenever your age was a prime number so was mine and vise versa?" . yes he replied and 17 yers from now i will say to MY son " you know for the last 18 years prior to this year whenever your age was a prime number so was mine and vise versa". how old are we?

not a slightest clue as to how to do this problem

2007-10-05 14:13:47 · 4 answers · asked by Anonymous in Mathematics

answer and problem work.Please.

2007-10-05 14:12:18 · 9 answers · asked by Anonymous in Mathematics

It's been a long time since using this method, anyone who can refresh my memory would be greatly appreciated. Thanks! :)

2007-10-05 14:07:28 · 5 answers · asked by Mizzy 3 in Mathematics