Science & Mathematics - 10 July 2007

2007-07-10 23:58:09 · 14 answers · asked by darestobelieve 4 in Physics

Anything in parenthesis is actually subscripted. If you could answer the problem for me that might be cool, too.

1) Consider the arithmetic sequence A = { An } determined by the conditions
A(n+1) - A(n) = 2
A(0) = 1
Work out the first 3 terms of the sequence and enter them below.
Separate the terms of the sequence by commas: 15, -3, 11, etc.

2007-07-10 23:55:33 · 4 answers · asked by Anonymous in Mathematics

What is the resistance of a resistor if the potential difference across the resistor is 4.0 V when a current of 10.0 A flows through the resistor?

2007-07-10 23:55:13 · 4 answers · asked by Anonymous in Physics

2007-07-10 23:53:22 · 5 answers · asked by Anonymous in Biology

the voltage and current in the circuit
the resistance, the current, and the time the circuit operates
the voltage and the resistance of the circuit
the current and the time the circuit operates

2007-07-10 23:53:09 · 4 answers · asked by Anonymous in Physics

Prove:
tan(A+B+C) = tanA + tanB + tanC - tanA tanB tanC / 1 - tanAtanB - tanBtanC - tanCtanA

I really need help... I try expanding but it doesn't work

2007-07-10 23:51:46 · 3 answers · asked by jin_ale 2 in Mathematics

I dont live with my fiance at weekends so only spend monday - friday with him in what is going to be our marital home. I keep on getting the feeling that I am being watched when I walk down the flights of stairs (we have three in our house) also if im alone in the bedroom!!! also we have just had a home cinema system installed in our living/dining room all is ok when my fiance is around it works fine but if im the first one in and turn the tv on it doesnt come on straight away and when it does its switched to radio or cd which is weird because it wasnt set that way when we watched tv the previous evening and of a morning when I get up to watch breakfast tv whilst I have breakfast it doesnt come on! Ive tried talking to my fiance about this because it freaked me out slightly and he says to me that it is working fine and it must just be me!! the house is brand new (well two years old) we are the first to live in it so I dont know what is going on!

2007-07-10 23:49:39 · 23 answers · asked by cat11977 2 in Paranormal Phenomena

2007-07-10 23:47:57 · 8 answers · asked by waverider 2 in Physics

Surely this would have made things more difficult during the dark ages? How would the cave men have been able to see what was going on properly?

2007-07-10 23:34:55 · 16 answers · asked by Leanne 2 in Biology

well, they said that there's a missing link on the theory of evolution, and if that missing link is found, it will be proven that we descended from apes/monkeys.. companies actually spend billions and billions of money to find this missing link... but the question is, why is it so important to find out if the theory of evolution is true? why spend a lot of money just to prove a theory? what will happen to our lives if it is proven? will the status of your life change? or not?


please help me, i need your opinions..

(this is my homework, by the way)

^_^

2007-07-10 23:28:30 · 21 answers · asked by sushi 1 in Biology

Is the speed of light the fastest or is there anything that's faster than the speed of light, considering that light travels at an astonishing speed of +- 300,000 kilometers per second!

2007-07-10 23:24:58 · 12 answers · asked by Anonymous in Astronomy & Space

A biological indicator used in autoclaving is a vial containing 10^9 Geobacillus stearothermophilus cels that is placed in the autoclave with the material to be sterilized. After autoclaving the vial is incubated and examined for growth. Why is this species used as opposed to E.coli or G. subtilis?

2007-07-10 23:22:55 · 2 answers · asked by Hiroshi 2 in Biology

A neighborhood carnival has a Ferris Wheel whose radius is 30 feet. You measure the time it takes for one revolution to be 70 seconds. What is the speed of this Ferris Wheel?

2007-07-10 23:15:33 · 6 answers · asked by Sharkman 1 in Mathematics

Does natural selection should favour organisms who can create information out of entropy?

2007-07-10 23:15:03 · 4 answers · asked by mesun1408 6 in Biology

I need to come up with an idea by friday for a physics project for my A Level course. It can be about almost anything, as long as its relatively quantitive (I can take data from any practicals I do) and its interesting!

Examples are:

Physics behind space travel
Physics behind the bicycle (I know, it was a previous example)
The physics of car engines

Please advice! Thanks! XD

2007-07-10 23:13:34 · 3 answers · asked by Sean 3 in Physics

i'm just curious. earth is covered with water, and the water moves around the globe, so anyone knows how long that it take to go around from ocean to ocean, from sea to sea, from beach to beach?

2007-07-10 23:11:21 · 3 answers · asked by q-noy 2 in Earth Sciences & Geology

2007-07-10 23:06:56 · 5 answers · asked by adnan1 1 in Engineering

is it harmful, and how far should I sit away from it

2007-07-10 23:05:01 · 4 answers · asked by babeintown 1 in Other - Science

2007-07-10 22:58:06 · 4 answers · asked by sci_voir 1 in Chemistry

2007-07-10 22:38:02 · 1 answers · asked by arun maari rajha 2 in Earth Sciences & Geology

2007-07-10 22:34:44 · 5 answers · asked by Ms.G 2 in Mathematics

2007-07-10 22:32:43 · 1 answers · asked by Loony07 2 in Zoology

2007-07-10 22:21:26 · 5 answers · asked by Bonathon M 3 in Physics

product of every machine is kept separate and there is no chance to mix with other. there may be other ways also to find which machine is producing coins of less or more weight but tell the procedure which take only one chance of weighing.

2007-07-10 22:20:10 · 2 answers · asked by gungun 2 in Other - Science

When dunking a tea bag in a cup of hot water and then lift it out to drain and drip the bag almost allways spins in a clockwise direction...why???

2007-07-10 22:13:27 · 5 answers · asked by Geedaw 1 in Physics

for the past few weeks now i have been having vivid dreams with my grandpa who passed away a long time ago... i recently lost a close loved one, but not thing from him but my grandpa says everything will be ok and have a good day and then i wake up. i feel refreshed and ready to do for a cry-free day of work is this common, or not

thanks if you have any input

2007-07-10 22:07:30 · 9 answers · asked by Harren 3 in Paranormal Phenomena

2007-07-10 22:03:44 · 8 answers · asked by cinonett 1 in Physics

What does 1+16 equal

2007-07-10 21:56:46 · 15 answers · asked by Anonymous in Mathematics

i am doing my summer assignment for math and i am stuck. i have done 90 other problems and these are the last few that i cant figure out.

where do f and h intersect?
f(x) = 3x-6
h(x)= x^2 -5

(g / f) (-4)
g(x)= e^ (x+4)
f(x) = 3x-6

where do j and k intersect?
j(x)= x- x^3
k(x)= 3x

2007-07-10 21:56:03 · 3 answers · asked by LT 4 in Mathematics

PLS.calculate

2007-07-10 21:49:46 · 19 answers · asked by nicolae m 1 in Engineering