Science & Mathematics - 19 December 2007

Please give me the name and where it's found.

2007-12-19 20:03:01 · 9 answers · asked by Noki 2 in Zoology

cos2t=(1-tan^2(t))/(1+tan^2(t))

2007-12-19 19:56:36 · 4 answers · asked by mike m 1 in Mathematics

1. Your wife wants you to clean the house with the vacuum cleaner. The surface of the area is 120 sq.mtr.
It takes you 40 seconds to clean 1 sq.mtr.
How long (in hours and minutes) will it take you to clean 95 sq.mtr?

2. A 1 ltr. bottle of Coke costs $1.50.
A 2.5 lrt coke costs $3.85
You purchase 12 ltrs. of Coke at the cheapest possible price.
What are you going to buy?

3. 2 2/3 + 4 3/4 (Quarters) + 5/6 =
Answer as a fraction:
Answer as a decimal fraction:

4. 1 3/4 (Quarters) + 1/2 + 2/3 =
Answer as a fraction:
Answer as a decimal fraction:

1/2 + 3/4 (Quarters) + 1/3 =
Answer as a fraction:
Answer as a decimal fraction:

Thank you for helping me with this! I'm in grade 3 and I needed some help with my studying. I couldn't ask my mum and dad cause there away on business trip.

2007-12-19 19:56:22 · 7 answers · asked by *BlueWolf* 1 in Mathematics

2007-12-19 19:42:15 · 2 answers · asked by yuvraj singh sengar 1 in Mathematics

2007-12-19 19:32:43 · 10 answers · asked by Ste Bone 5 in Earth Sciences & Geology

You are selling a coin to a customer for $120.
However, your customer wants 15% discount. After haggling for an hour and nearly killing him, you decided to give him a 12% discount. But... he also has a trade in a coin, which he bought from you for $80 some time ago. However, you allow him 75% of his purchase price of that coin towards the purchase of the new coin.

What does your customer still have to pay you to get the new coin?

2007-12-19 19:30:37 · 3 answers · asked by *BlueWolf* 1 in Mathematics

Solve analytically.

5^x = 4^(x+3)

2007-12-19 19:15:43 · 6 answers · asked by Gemini19 2 in Mathematics

2007-12-19 19:12:32 · 2 answers · asked by johnpaul a 1 in Chemistry

A.) determined by the components that are external to the device
B.) High
C.) Low

2007-12-19 19:03:30 · 4 answers · asked by Anonymous in Engineering

How much neurontin would someone have to take to overdose?

2007-12-19 19:01:38 · 2 answers · asked by Anonymous in Medicine

2007-12-19 19:01:20 · 3 answers · asked by ? 1 in Mathematics

2007-12-19 19:00:25 · 8 answers · asked by Anonymous in Mathematics

During a miliary function,bullets are usually fired in the air.But when the bullet comes back to the ground,why does'nt it hit somebody?And if it does,why does'nt somebody get hurt due to its impact?

2007-12-19 18:58:21 · 8 answers · asked by asheeb r 1 in Physics

2007-12-19 18:58:10 · 4 answers · asked by Anonymous in Mathematics

A forward biased E-B junction and a reverse biased C-B junction?

A reverse biased E-B junction and a reverse biased C-B junction?

A forward biased E-B junction and a forward biased C-B junction?

A reverse biased E-B junction and a forward biased C-B junction?

2007-12-19 18:52:09 · 1 answers · asked by random Q 2 in Engineering

i.e,if its without any protection(will it shrink,explode...etc)

2007-12-19 18:50:45 · 7 answers · asked by Anonymous in Astronomy & Space

2007-12-19 18:49:11 · 2 answers · asked by random Q 2 in Engineering

2007-12-19 18:47:03 · 1 answers · asked by random Q 2 in Engineering

Correct me if I'm wrong. Matter can transform into massless energy, and vice versa. Can someone explain how this is possible, if it is true?

2007-12-19 18:45:51 · 6 answers · asked by calzrhe 7 in Physics

I have accidentally linked with several people over the years and even though they are thousands of miles away I still know when something happens to them. It is disturbing, because I have to call all of them to figure out which one is the source. It is very disruptive and painful sometimes. Panic attacks from an aunt 2000 miles away can be painful, I had a heck of a time tracking her down. can I be trained in some way to know the difference in links, and maybe block some of the more minor physical aches and pains of my links?

2007-12-19 18:45:31 · 7 answers · asked by m k 1 in Paranormal Phenomena

I think I know how to solve for this but when I check my answer it's incorrect. What I do is place (4/3) on both sides to cancel out (3/4) then I divide both sides by 2 and get 322.5. However, when I plug it into 2x^(3/4) I don't get 128.

2007-12-19 18:37:09 · 6 answers · asked by georgie0515 1 in Mathematics

2007-12-19 18:31:40 · 3 answers · asked by gal2210 1 in Physics

---> --->
OAB is a triangle with OA=a and OB=b. P and Q are the mid-points of OA and AB, respectively.

DIAGRAM--->http://i210.photobucket.com/albums/bb154/slaveg0d/diagram.jpg

---> ----> -----> ---->
a)PA b)AB c)AQ d)PQ

2007-12-19 18:29:52 · 3 answers · asked by Anonymous in Mathematics

2007-12-19 18:25:58 · 6 answers · asked by ckaipolani 2 in Medicine

2007-12-19 18:25:52 · 1 answers · asked by Widy Hartono 1 in Medicine

???

2007-12-19 18:20:25 · 16 answers · asked by Anonymous in Astronomy & Space

...such that you could obtain the iodine and dry crystals of magnesium iodide.

The last question I have for my chemistry homework. Help or hints appreciated. =)

2007-12-19 18:13:38 · 3 answers · asked by Unknown Darkness™ 7 in Chemistry

Hi, my fiancee and I were out on the beach today and saw this wierd sea urchin type creature, but i couldnt figure out what it was for the life of me. Any one have any ideas? heres the pic:
http://i51.photobucket.com/albums/f351/nafogel/P1010647.jpg

2007-12-19 18:07:24 · 6 answers · asked by nafogel 2 in Zoology

There are two theories regarding this, Relativity of Einstain and Dynamic theory of garvity of Nikola Tesla. Dynamic theory of gravity basically negates the relativity with enough justifications and had actually been tested and proven physically by Tesla. On the other hand, relativity is proven by strong mathematical proofs. which one do you believe in? Tesla or Einstain?

2007-12-19 18:02:58 · 2 answers · asked by nimaomega 1 in Engineering

Could I use a series of transformers to step up an extremely low voltage - like a 9V battery - to a very high one (like that of a power station) by using superconductor matrial for the wires and cooling it to about 4 degrees Kelvin in order to overcome any resistance? I imagine it would be expensive, but would such a device have any benefit for power generation? Could it be done or would the low temperature slow the flow of electrons?

2007-12-19 17:54:02 · 8 answers · asked by Anonymous in Physics