Science & Mathematics - 9 October 2007

2007-10-09 04:42:27 · 17 answers · asked by Anonymous in Weather

plz tell. first one gets best answer

2007-10-09 04:41:17 · 18 answers · asked by Anonymous in Mathematics

plzz.. define each of them .. it's important ...

2007-10-09 04:39:12 · 2 answers · asked by jhay ar 1 in Physics

eg. will the brain die before the person really hits the ground?

2007-10-09 04:36:13 · 5 answers · asked by Anonymous in Biology

___1___
1+2^1/3

1 divided by
1 + cube root of 2

2007-10-09 04:29:24 · 6 answers · asked by Anonymous in Mathematics

please answer asap

2007-10-09 04:26:18 · 5 answers · asked by Anonymous in Astronomy & Space

i know something like the male gamete is always"XX or YY..but i seriously don;t understand this! so how so you determine gender and what is the genotype for females?

2007-10-09 04:25:49 · 9 answers · asked by amelia l 1 in Biology

A particle moves along a straight line with equation of motion s = f(t), where s is measured in meters and t in seconds. Find the velocity and speed when t = 3.
f(t) = t ^-1 - t

velocity= ? m/s
speed= ?m/s

2007-10-09 04:25:45 · 2 answers · asked by lady_divine@sbcglobal.net 1 in Mathematics

2007-10-09 04:23:13 · 8 answers · asked by Anonymous in Mathematics

2007-10-09 04:18:22 · 6 answers · asked by Anonymous in Chemistry

I do believe in the moon landing and was curious about the mechanics behind it. The moon has amazing temparatures that I doubt anyone could withstand unprotected. What kind of powers do these suits hold and have they evolved since the first moon landing?

2007-10-09 04:17:18 · 2 answers · asked by lemon cheese 3 in Astronomy & Space

is there growth hormones or something?? that cant be natural!!

2007-10-09 04:17:07 · 6 answers · asked by Anonymous in Botany

(6y^2 - 3y)(y + 7)

2007-10-09 04:15:41 · 3 answers · asked by tbond_1969 1 in Mathematics

take the case of1. free fall and also of 2.an object moving on a surface and 3.an object moving in space etc.... and as many as possible....
some say dependent while some say independent . I'm confused..........................
I just know that acceleration is inversely proportional to mass................

2007-10-09 04:08:29 · 6 answers · asked by Anonymous in Physics

2007-10-09 04:06:39 · 2 answers · asked by Anonymous in Biology

**PLEASE NOTE: I DO NOT WANT THE ANSWER**
I just want to know how to work it out =]

1) A student wants to find out the efficiency of a stereo system, rated at 20 watts sound output. She buys some batteries, which store 400,000 joules of energy of chemical energy. When the new batteries are put into the stereo, and its switched on to play a tape, the batteries run out after 5 hours.

a) How much energy has the stereo usefully given out?

b) What is the efficiency of the tape recorder

In class we learnt that
Efficiency = Useful energy out divided by total energy in



The last question is:
If the stereo is used on the radio setting, would you expect the batteries to last longer?

I don’t know if it takes more power to power the motor to spin the CD and the laser to read it or if it takes more power to receive the signal from the radio station???


Please help me

Thanks for your time

2007-10-09 04:06:00 · 1 answers · asked by Anonymous in Physics

I mean whenever a mass is placed in spacetime it bends it causing gravitation anf time dialation around it right???

even magnetic field and electric field represent curved spacetime but why is it that magnetic fiel of a magnet attarcts or responds only to MAGNETIC substaneces? if its merely a curvature of spacetime all the "masses" should follow it and on nearing it should strike onto it..but its not quite so...
2)AND magnet repels like poles how is that..when its just a curve of space??? does space decide what type of matter sould follow it and in what directio0mn and manner?????


plz give full explanation..

fast!!

2007-10-09 04:05:00 · 3 answers · asked by Swapnil B 2 in Physics

a) Find the angular speed of the wheels in rad/min
b) How many revolutions per minute do the wheels make?

2007-10-09 04:00:30 · 5 answers · asked by Carson B 1 in Mathematics

They are 1.2.3 (b) & (c); 1.3.4
http://www.math.hkbu.edu.hk/~wmxue/m0011/assignment1.pdf
You can mail your answer to me and/or post it here.

2007-10-09 03:58:12 · 1 answers · asked by Han Z 1 in Mathematics

2007-10-09 03:57:41 · 2 answers · asked by Thinker 3 in Mathematics

how long will it take to reach the moon?

2007-10-09 03:55:16 · 5 answers · asked by Lisa 1 in Astronomy & Space

2007-10-09 03:50:24 · 1 answers · asked by Namrata N 1 in Biology

determine the lovest common denominator in the following fractions:

3/4 2/3 7/12 9/16

this are not halfs..the line supposed to go in the middle of each number, but i can't type that in my pc, so i did it as such /

2007-10-09 03:49:58 · 5 answers · asked by Anonymous in Mathematics

provide detail answer

2007-10-09 03:49:43 · 3 answers · asked by Lisa 1 in Astronomy & Space

Please help. Thank You,

2007-10-09 03:49:01 · 3 answers · asked by yefimthegreat 1 in Mathematics

Using the chain rule?

2007-10-09 03:46:37 · 4 answers · asked by yefimthegreat 1 in Mathematics

How do you calculate the length of a parabola. The formula would suffice, but the parabola I am tryng to calculate for is symetrical about the y axis, 200mm from one end to the other (as the crow flies) and 91.36mm from the focal point to the x axis. Hope that makes sense.

Thanks.

2007-10-09 03:44:23 · 3 answers · asked by John Sol 4 in Mathematics

2007-10-09 03:42:13 · 3 answers · asked by Charlene 2 in Physics

2007-10-09 03:42:12 · 10 answers · asked by cernics221 1 in Chemistry

2007-10-09 03:40:59 · 4 answers · asked by referencearea 2 in Mathematics