Science & Mathematics - 12 October 2007

2007-10-12 05:20:34 · 7 answers · asked by Anonymous in Physics

2007-10-12 05:11:18 · 8 answers · asked by garnes d 2 in Biology

Is it possible, even theoretically, to bend or otherwise manipulate the fabric of space-time other than by the gravity effect of a mass?

2007-10-12 05:10:36 · 3 answers · asked by juicy_wishun 6 in Physics

2007-10-12 05:10:11 · 4 answers · asked by Anonymous in Biology

can anyone write an argument on peat because i have a debate on peat!!! please oh and it is not for taking peat and using it.It is for not taking peat out of the ground i need help FAST!

2007-10-12 05:07:41 · 3 answers · asked by Anonymous in Botany

2007-10-12 05:06:40 · 7 answers · asked by Anonymous in Mathematics

if good things doesnt happen to you doesnt mean there is no GOD ,
i am asking something scientific or proven studies done about this subject...if you could site the reference it would be great ......
thx fellas

2007-10-12 05:02:10 · 16 answers · asked by servant 2 in Other - Science

I need help to prove this please.
Integrate(from pi to pi) of sin(mx) sin(nx) dx is pi if n=m and the integration equals zero is n not equals to m.
Yes, it is integrating from +pi to +pi.
Please show me the proves. You can show either one. Thank you!

2007-10-12 05:01:12 · 3 answers · asked by the DoEr 3 in Mathematics

2007-10-12 05:00:24 · 7 answers · asked by Anonymous in Mathematics

2007-10-12 04:55:32 · 2 answers · asked by Jansen J 4 in Astronomy & Space

we have the milleage of a car example a maruthi car or other branded car is having approx. 12 to 20milleage , or a bike of 50 to 60 milleage on road. what is the milleage of an aeroplane or jet in air.

2007-10-12 04:55:08 · 3 answers · asked by khanimran_1432002 1 in Engineering

It's because last night we were asleep and my husband had turned off all the lights but I woke up and I could see three little mirror frames that I have on my wall ..they looked bluish ..and I know that when all the lights are off its really dark and you cant even see them..but I sat up in bed ..half asleep and I kept staring at them..It seemed like they glowed blue.. I didnt think anything bad but Im still concerned,,, I think I was so tired I just fell back to sleep ..then I started having nightmares of that..but I prayed and prayed so I feel better... I was just wondering if maybe energy can be absorbed in the mirror or maybe I was just hallucinating from sleepiness?? Help me!

2007-10-12 04:53:02 · 5 answers · asked by Lorena 3 in Other - Science

I just found an american website that sells Hybrids of cannabis which are totally legal. anyone know uf theyre any good?

2007-10-12 04:52:24 · 13 answers · asked by lizzie c 2 in Botany

Do you think that you can be so close to someone that you can sometimes read their thoughts? When I was a kid I could sometimes tell my mother what she was going to say before she even said it.

And just the other day I was thinking to myself about something that happened back in the summer, and my 4-year
old daughter suprised me by bringing up the same subject.
And it's not the first time she has done that.

Has this ever happened to you? Is it merely a coincidence?

2007-10-12 04:51:19 · 25 answers · asked by Anonymous in Paranormal Phenomena

I do approve of recycling and improving our treatment of the environment and how we live. I think fear of a vengefull 'Earth God' that we have to sacrifice our carbon offsets and 'not anger lest he smite us' is a good incentive for us all to 'straighten up and fly right' literally.
But the solar activity evidence, and the lack of heating of the troposphere, the fact that they used to grow grapes in greenland in the middle ages, make me feel uncertain about the links with manmade global warming.

Should I just go along with it? at least we will get a better planet in the short term out of it, even if we aren't REALLY saving the planet by driving less right?

2007-10-12 04:49:24 · 6 answers · asked by Anonymous in Other - Science

When you take your 1200 kg car out for a spin, you go around a corner of radius 54.6 m with a speed of 15.3 m/s. The coefficient of static friction between the car and the road is 0.91. Assuming your car doesn't skid, what is the force exerted on it by static friction?

2007-10-12 04:48:29 · 1 answers · asked by Anonymous in Physics

A curve has the equation y = 2cos x - cos 2x

(i) Given that sin 2x may be expressed as 2sin x cos x, find the x-coordinate of the stationary point of the curve and determine the nature of this stationary point.

Please show your workings clearly and explain..thks

2007-10-12 04:47:46 · 3 answers · asked by Anonymous in Mathematics

all i know is tht:
1) set equation to y---so y= x^3 - 7
2) switch x and y---- so x = y^3 - 7
3) solve for y
4) put in inverse notation

i do not know how to do number 3 or 4....for number 3, i need 4....thanks guyz for the help....i understand all the other ones....just this one i am confused on because of the y^3...

2007-10-12 04:47:03 · 5 answers · asked by Anonymous in Mathematics

To supply blood to all parts of the body, the human artery system must branch repeatedly. Suppose an artery of radius r branches off from an artery of radius R (r>r) at an angle θ. The energy lost due to friction is approximately this:

E(θ)=(csc θ/r^4)+((1-cot θ)/R^4).

Find the value of θ that minimizes the energy loss.

I'm not asking for the answer, I just need help in finding the derivative for the equation, so that I can solve for θ. That is how the book has the problem stated.

2007-10-12 04:45:55 · 2 answers · asked by Anonymous in Mathematics

(a) Potassium hydroxide(aq) + hydriodic acid(aq)
(b) Ammonia(aq) + hydrochloric acid(aq)
*molecular
*total ionic
*net ionic
*spectator ions

2007-10-12 04:44:52 · 1 answers · asked by Anonymous in Chemistry

2007-10-12 04:44:29 · 8 answers · asked by Anonymous in Mathematics

A car goes around a curve on a road that is banked at an angle of 30.0°. Even though the road is slick, the car will stay on the road without any friction between its tires and the road when its speed is 22.0 m/s. What is the radius of the curve?

2007-10-12 04:41:52 · 1 answers · asked by Anonymous in Physics

2007-10-12 04:41:32 · 4 answers · asked by Anonymous in Mathematics

humans when getting old almost lost all their teeth far before life span.

2007-10-12 04:41:22 · 5 answers · asked by Anonymous in Biology

When Skylab reentered the Earth's atmosphere on July 11, 1979, it broke into a myriad of pieces. One of the largest fragments was a 1680 kg lead-lined film vault, and it landed with a estimated speed of 120 m/s. What was the kinetic energy of this film vault when it landed?

2007-10-12 04:40:55 · 1 answers · asked by Anonymous in Physics

2007-10-12 04:39:54 · 4 answers · asked by Anonymous in Mathematics

Find y' of y= 3x^-4 - 1/x^2

2007-10-12 04:39:23 · 6 answers · asked by jewel7962002 1 in Mathematics

2007-10-12 04:38:20 · 5 answers · asked by Anonymous in Mathematics

30
60
90


The angles are 150* 120* 30* and 60*.

2007-10-12 04:32:04 · 2 answers · asked by Anonymous in Mathematics

The ampere is a constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross section, and placed 1 meter apart in a vacuum, would produce between these conductors a force equal to 2×10–7 newton per meter of length.

IN THIS, WHAT DO U MEAN BY "NEGLIGIBLE CIRCULAR CROSS SECTION" ?

2007-10-12 04:28:00 · 1 answers · asked by Anonymous in Physics