Science & Mathematics - 2 December 2007

If a person who weighs 612N sits in a hammock 3m long and sags 1m below the point of support, what force is exerted on the ropes suporting the hammock. Please help me by showing how you got that answer

2007-12-02 07:19:52 · 2 answers · asked by Anonymous in Physics

Question is not serious - just in the "spirit" of fun.

Hopefully, no whiny baby will go to yahoo and ask for its removal.


Hi Denie

2007-12-02 07:19:45 · 29 answers · asked by Anonymous in Paranormal Phenomena

its what miss Minger told me last night, we were at a pub quiz and the question was why do bees make honey, and she said oh Malcy I know this, its bees pooh!
We lost the quiz we only got a few correct, mainly capital cities in Africa that I got!

2007-12-02 07:19:26 · 22 answers · asked by Anonymous in Zoology

A weather station releases a balloon that rises at a constant 15m/s relative to the air, but there is a wind blowing at 6.5m/s toward the west. What are the magnitude and direction of the velocity of the balloon?

What is the resulting displacement of the following series of movements: 10.0m[N65oW], 20.0m[S], 15.0m [W15oS].

2007-12-02 07:17:27 · 1 answers · asked by Anonymous in Mathematics

f(x)=x^3+x, g(x)=f^-1(x), g(2)=1

what is the value of g'(2)?
i am not sure how to do this, so please help me

2007-12-02 07:15:39 · 2 answers · asked by dougo 2 in Mathematics

2007-12-02 07:14:16 · 12 answers · asked by chester T 1 in Chemistry

solve these systems of equations and if a unique solution does not exist state weather the system is inconsistent of dependent

{5x-6y=21
{x-2y=5

2007-12-02 07:08:52 · 3 answers · asked by Anonymous in Mathematics

Hi ya

been doing an exercise and can'y get my head round this question.

A stone slides in a straight line across a frozen pond. Given that the intial speed of the stone is 5 ms and that it slides 20m before coming to rest. Calculate the coefficient of friction between the stone and surface of the frozen pond.

I worked out the the acceleration to be -0.625 but am not sure where to go next. Probably something really obvious.

Thanks

Matt

2007-12-02 07:07:46 · 5 answers · asked by matthew b 1 in Mathematics

Oxygen is found in the atmosphere as a diatomic gas, O2
and ozone is found as O3

Here is the question i have, i didnt get this right on my ap chem test and i want to know how to do it

Use the principles of bonding and molecular structure to account for the fact the ozone has a higher boiling point than diatomic oxygen.

2007-12-02 07:06:16 · 2 answers · asked by Anonymous in Chemistry

2007-12-02 07:05:22 · 3 answers · asked by Gail Therese C 2 in Astronomy & Space

2007-12-02 07:05:10 · 1 answers · asked by abhin t 1 in Mathematics

I made a bet with my teacher,he is really cool,i bet a box of brownies and 10$$ if i win i get no homework for a week a box of brownies and 7$$
The bet is i can think of a question he cant answer,or he doen't know the answer to I cant think of a question!!!!!! please help me thanks


He is a 6th grade math teacher

2007-12-02 07:04:05 · 6 answers · asked by Anonymous in Mathematics

A sled of mass 50 kg is pulled along snow-covered, flat ground. The static friction coefficient is 0.30, and the sliding friction coefficient is 0.10. What force is needed to get the sled moving? Then, what force is needed to keep the sled moving at a constant velocity? And once moving, what total force must be applied to the sled to accelerate it 2.0 m/s2?

2007-12-02 07:03:55 · 2 answers · asked by Anonymous in Physics

Let me start my question by saying I really like the idea of nuclear energy. It's a great energy source and I love it way more than coal, oil or even solar for a variety of reasons.

That said, I can easily find rough estimates on how much oil our world has available, how many square miles of land we'd have to cover with solar panels for solar energy and our coal reserves... But I can't find anything about how much nuclear fuel there is available to be mined.

Is this because it is a non-issue due to the sheer amount or is it because of ignorance the question hasn't been asked in the media?

How much nuclear fuel is available to the world? Is it a practical amount that would satiate our energy desires for a significant amount of time? What public studies are available concerning the practicality of mining, refining and processing ore into nuclear fuel?

Big question but I couldn't find an answer on Wikipedia. Thanks!

2007-12-02 07:01:53 · 3 answers · asked by Jeff 2 in Earth Sciences & Geology

i need 2 know to finish my project and i cant find the answer. can sumbodii please help me!!

2007-12-02 07:01:45 · 2 answers · asked by Monique L 2 in Botany

What are some info about Mars...??

2007-12-02 07:00:05 · 4 answers · asked by Anonymous in Astronomy & Space

a) Why does air pressure increase when u pump up a bike tyre??????


B)how would the air pressure change as the temperature got warmer


C)Biefly explain your answer to part B

D) Explain why tyres that contain air avbsorbing bumps are better than solid rubber tyres....


???????


thank u (if u answered).......

p..s.....u dont have 2 answer all of them

Thank u once again....

2007-12-02 06:57:54 · 2 answers · asked by Anonymous in Chemistry

Besides ethical ones, can genetically modified foods be risky to humans? How can those challenges be overcome to increase the benefits to mankind?

2007-12-02 06:56:50 · 1 answers · asked by Voldemort 2 in Other - Science

can the langrange multiplier itself (i.e. Lambda) assume the value of 0? or do we assume the lamda is always a none zero value.

2007-12-02 06:56:47 · 3 answers · asked by Chris L 1 in Mathematics

2007-12-02 06:56:14 · 1 answers · asked by Anonymous in Biology

http://i211.photobucket.com/albums/bb139/Pacman5844/RADIPS.jpg
This is the spider from my previouse question

2007-12-02 06:55:33 · 3 answers · asked by Anonymous in Zoology

cracking the code of life video guide

2007-12-02 06:55:17 · 2 answers · asked by geni 1 in Biology

2007-12-02 06:54:45 · 2 answers · asked by abhin t 1 in Mathematics

Bicycle and rider weigh 250 Lbs
Force applied at the pedal is 25 Lbs
Wheel Diameter is 20"
Pedal length from center of drive sprocket is 10"
Drive pedal sprocket has 20 teeth
Idle driven sprocket has 35 Teeth
What is the force applied by the tire on the road?
What is the acceleration?
What is the velocity after 20 seconds?
What is the coefficent of friction supposed to be for this to happen?
Must explain the steps

2007-12-02 06:53:26 · 1 answers · asked by calcstress 1 in Physics

ok so for earth science i have to research 2 locations which front a large body of water, but not in New York State!!!
some things we have to research is the climate,the water,etc.
my teacher said make it place you would like to live or at least find interesting!
Can anyone give me some 2 or more locations which front a large body of water?
P.S. NOT IN NEW YORK STATE

2007-12-02 06:51:55 · 11 answers · asked by "Bad Boii" 5 in Geography

Ok, I'm stuck on my homework, the question asks me:

1. what are the type of chemicals used up during "cracking" ?

The choices are : a-short Molecules, b-long molecules, c-saturated hydrocarbons, d-unsaturated hydrocarbons, e-sulphur, f-high demand oil fractions, g-low demand oil fractions, h-catalysts, I-tarmac, j-plastics.

What two of a,b,c,d,e,f,g,h,i and j, should I choose ? I really need this !

2007-12-02 06:49:35 · 3 answers · asked by pop 4 in Chemistry

f(x)=x^2+6x-2
a) Find h, the x-coordinate of the vertex of this parabola.

b) Substitute the two whole number values immediately to the left and right of h into the function to find the corresponding y. Fill in the table below. Make sure your x-values are in increasing order in your table.
x y

h=

2007-12-02 06:45:54 · 2 answers · asked by ViewSonic 2 in Mathematics

2007-12-02 06:43:15 · 2 answers · asked by terriann m 1 in Chemistry

f(x)=2x-3\x^2+2
Horizontal:
Vertical:

b) g(x)=5x\x-1
Horizontal:
Vertical:

2007-12-02 06:43:14 · 2 answers · asked by ViewSonic 2 in Mathematics

if Rigel is extremely bright (40,000 times more than the sun at visible wavelengths) and burns with a blue-white light, why would this indicate that it is much younger than the Sun?

i thought young stars were cool, and that red stars were cool and blue ones were hot. if Rigel is shining blue then surely this should indicate that it is actually hotter and therefore older than the Sun?

2007-12-02 06:41:17 · 3 answers · asked by fpa06mr 5 in Astronomy & Space