Science & Mathematics - 21 September 2007

The purpose of the male orgasm to expell semen is obvious, but why does females have orgasms? (in a biological sense). Naturally, of course they deserve the same pleasures as men. Would females maybe otherwise don’t let males near them if there is no “benefit” in doing so?

2007-09-21 12:47:29 · 7 answers · asked by Diddle 3 in Biology

2007-09-21 12:46:27 · 7 answers · asked by Anonymous in Earth Sciences & Geology

are there any facts that can prove global warming wrong

2007-09-21 12:43:50 · 7 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-21 12:43:17 · 9 answers · asked by Anonymous in Physics

2007-09-21 12:38:34 · 6 answers · asked by jason 1 in Weather

You are desgining a soft drink container that has the shape of a right circular cylinder. The container is to hold 16 fluid ounces. Find the dimensions that will use minimum amount of construction material?

2007-09-21 12:37:28 · 5 answers · asked by Kakak 1 in Mathematics

2007-09-21 12:32:17 · 11 answers · asked by Macgyver with Crosby 4 in Earth Sciences & Geology

2007-09-21 12:31:47 · 11 answers · asked by Anonymous in Mathematics

2007-09-21 12:29:18 · 13 answers · asked by Anonymous in Mathematics

I have to come up with a project for one of my "project" classes. The project class deals with communications. I got the "okay" to do a wireless controller. The schematic is here: http://www.bpesolutions.com/gadgets.ws/gproject5.html#anchor123361

However, instead of A and B inputs, I would like to make a very basic motion sensitive controller (probably just detecting a left or right tilt).

Is the addition of motion detection possible for a hobbyist? Can you recommend resources for this (I tried looking but can't really find anything). Thanks!

2007-09-21 12:26:11 · 3 answers · asked by Galbadian 2 in Engineering

the vectors (1,2,2) and (2,-2,1) in R^3 determine a plane P through the origin

True or false, the vector (3,0,3) lies in P
True or false, vector (2,1,-2) lies in P

im sure i can figure this out myself I just dont know the process on how to check if they belong in P.
if somone can explain the process then i should be good

2007-09-21 12:20:59 · 5 answers · asked by Anonymous in Mathematics

The mass m of a substance at time t is modelled by the equation m = m0e^-kt where m0 is the initial mass and k is a constant. After 20 years, 1/5 has decayed and 4/5 remain.

2007-09-21 12:20:49 · 6 answers · asked by Niall R 1 in Mathematics

1. For the following equation, take any two points on the line and calculate the slope: y = 5x - 2.


....Please let me know if i have any mistakes:

y = 5x -2 ; is equivalent to: y = 5(1) - 2

So, the two points would be (5, -2) and (1, -2)

m(slope) = (y2 - y1) / (x2 - x1) = (-2-(-2) / (1-5) = (-2+2) / (1-5) = (0) / (-4). So would the solution or the slope be (0/-4) ?

2007-09-21 12:17:53 · 8 answers · asked by dana c 1 in Mathematics

Hint: The General Term is Tn= (3/4) - (5n(n-1) / 8)

2007-09-21 12:17:36 · 1 answers · asked by MJ 3 in Mathematics

2007-09-21 12:17:29 · 8 answers · asked by Anonymous in Zoology

How to do astral projection or have an OBE? Answer please!

2007-09-21 12:16:18 · 12 answers · asked by Anonymous in Paranormal Phenomena

i posted this in the wrong forum, this should be right

I need to differentiate these 2, can anyone help?

a) f (x) = 3x^3 - 2 / 2x

and

b) y = -8e^2-5x

I really dont get these so help would be appreciated, thanks

2007-09-21 12:13:50 · 2 answers · asked by jake p 2 in Mathematics

f (x) = ln(1 - sin x)

2007-09-21 12:13:22 · 5 answers · asked by Niall R 1 in Mathematics

2007-09-21 12:08:02 · 7 answers · asked by joseph c 1 in Mathematics

2007-09-21 12:07:16 · 1 answers · asked by dird 2 in Chemistry

Would someone who had both legs removed be called a bi-pedular amputee?

2007-09-21 12:06:25 · 7 answers · asked by April J 4 in Medicine

i have wondered for sometime if you place a microphone in front of a speaker and then made a noise for the microphone to pick up and send it down a wire to the speaker when the speaker played the sound you had just made would the microphone pick it up and send it down again for the speaker to play it again if it does would that mean that you have a noise that will last forever due to it being in a loop?

2007-09-21 12:05:44 · 4 answers · asked by Agent Zero® 5 in Other - Science

When the following reaction occurs
h_3po_4)(aq)+ca(oh)_2(aq)---->

what is the formula for the salt formed?

2007-09-21 12:01:30 · 2 answers · asked by stranger 1 in Chemistry

2007-09-21 12:00:28 · 1 answers · asked by shall_i 1 in Physics

Vector A, which is directed along an x axis, is to be added to vector b, which has a magnitude of 8.0 m. The sum is a third vector that is directed along the y axis, with a magnitude that is 7 times that of A. What is the magnitude of A? (Enter your answer to 4 significant figures.)

2007-09-21 12:00:19 · 1 answers · asked by Anonymous in Physics

An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp. He was supposed to travel due north for 5.3 km, but when the snow clears, he discovers that he actually traveled 7.8 km at 46° north of due east.

(a) How far must he now travel to reach base camp?

(b) In what direction must he travel?(counterclockwise from due east)

2007-09-21 11:58:13 · 1 answers · asked by Anonymous in Physics

The two vectors and in the figure below have equal magnitudes of 7.0 m and their angles are θ1 = 30° and θ2 = 95°.

a) Find the x and y components of their vector sum r.

(b) Find the magnitude of vector r.

(c) Find the angle vector r makes with the positive x axis

2007-09-21 11:57:04 · 2 answers · asked by Anonymous in Physics

In the sum + = , vector has a magnitude of 15.0 m and is angled 48.0° counterclockwise from the +x direction, and vector has a magnitude of 15.0 m and is angled 25.5° counterclockwise from the -x direction. What are the magnitude and the angle (relative to +x) of ?

__________m at _________° counterclockwise from the +x direction

2007-09-21 11:55:16 · 2 answers · asked by Anonymous in Physics

2007-09-21 11:54:45 · 12 answers · asked by Anonymous in Mathematics

An airplane flies at airspeed (speed relative to air) 145km/h. THe pilot wishes to fly due West but there is a 29.9 km/h wind blowing in from North to South.
a) In what direction should the pilot head the plane?
b) What would be the ground speed of the plane (its speed relative to the ground)?

Please explain..mas confusion :( Thanks everyone!

2007-09-21 11:51:25 · 2 answers · asked by Anonymous in Physics