Science & Mathematics - 13 November 2007

In bungee-jumping, a daring student jumps from a balloon with a specially designed elastic cord attached to his ankles, as shown in Figure P5.69. The unstretched length of the cord is 28.0 m, the student weighs 705 N, and the balloon is 36.0 m above the surface of a river below.

Calculate the required force constant of the cord if the student is to stop safely 3.00 m above the river in N/m

I have no idea what to do. All I know is that I must convert gravitational energy (potential) to either elastic and kinetic energy somehow. Please help. A thorough explanation and reasoning would be greatly apprecitated. Please keep in mind that I am not able to use calculus methods such as integrals and derivitaves, but only transfer of energy.

Thank you. I promise the first person to thoroughly help me will get a best answer.

2007-11-13 10:00:26 · 1 answers · asked by I Need Help 4 in Physics

i know this is a random question, but i do need to know, its something for my poetry project. thxs

2007-11-13 09:58:06 · 6 answers · asked by Anonymous in Botany

Ii kind of need help with the planets? can you pleese help with this pleese?

2007-11-13 09:56:54 · 3 answers · asked by Michael 2 in Astronomy & Space

I'm going to use 'S' as the integral sign. The interval is [x,0] so x=b and 0=a

***WORTH 10 POINTS**
Question: Identify all local extrema of f(x)=S[x,0] (t^2 -3t +2) dt.

It's kind of funny because I handed in my quiz and this problem was worth 10 points. I knew for sure I was going to get a zero on this problem, even though we just went over it like 2 minutes ago. The thing is though, I was trying to evaluate another problem that I thought for sure was going to be on the quiz. How wrong I was! Anyways, I asked the TA after class if i could re-do it and he gave me the heads up. So this is what I wrote:

(x-1)(x-2)
local max @ x=1
local min @ x=2

In addition, I had some scribbled out (still recognizable) work I did previously which involved the integration of the original equation. All in all, that's what I had as my final answer. I knew I blew it and if I'm ever on the borderline of committing suicide, I'll just think back to this instance and my mind will be made up.

2007-11-13 09:56:28 · 2 answers · asked by Anonymous in Mathematics

i was playing around with some toy magnets and trying to see what all it would stick to and i put it up to the computer sceen and it made the sceen move and it would change colors wherever you moved the magnet...why does it do that and will it mess up the computer?

2007-11-13 09:54:16 · 6 answers · asked by Anonymous in Physics

p(blue 1 and green 1 or 2)

2007-11-13 09:52:44 · 4 answers · asked by nicole 1 in Zoology

After you found out all you wanted to know from them.....what would you do with them?
(I'm sure I'll get a lot of silly answers...but hopefully a few sincere ones too. .) (I know I'm setting myself up for silly answers. And skeptics...just try to use your imagination...PRETEND this could happen!)

2007-11-13 09:51:25 · 22 answers · asked by Deenie 6 in Paranormal Phenomena

5/2x+3/2x
(1/6)(6/5)
-7/13 divided by 5/26
x/4 *2/5

thankyou guys!!

2007-11-13 09:51:12 · 2 answers · asked by El_amore 2 in Mathematics

Give an example of a situation that would violate the Law of Conservation of Energy?

2007-11-13 09:48:57 · 1 answers · asked by Anonymous in Physics

i need some help on some chemistry homework!!! i need to know the chemical formulas of baking powder, cornstarch, sugar,vinegar and iodine. and i need the scientific names of them too!!!
please help!

2007-11-13 09:45:49 · 2 answers · asked by Chelsea Grace <3 3 in Chemistry

Many reputable scientist are predicting another Ice Age. Why does the liberal media not report that fact?

2007-11-13 09:44:15 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Please explain why or why not for 10 points.. thank you!

2007-11-13 09:44:14 · 4 answers · asked by Silver 5 in Weather

write the rule for each function. write the rule as an equation
Rule:
input h 3 2 5 1 10 30 20
output p 20 30 12 60 6 2 3

2007-11-13 09:43:41 · 3 answers · asked by star58 1 in Mathematics

2007-11-13 09:42:48 · 6 answers · asked by Lynette T 1 in Zoology

...involves the sex chromosomes.
...involves chromosomes 1 through 22.
...involves just the X chromosome.
All of the above

2007-11-13 09:41:35 · 4 answers · asked by Anonymous in Biology

2007-11-13 09:41:24 · 4 answers · asked by Anonymous in Astronomy & Space

A) red-green color blindness
B) sickle cell anemia
C) hemophilia
A & B
A & C

2007-11-13 09:39:51 · 1 answers · asked by Anonymous in Biology

2007-11-13 09:36:14 · 6 answers · asked by amcan1952 1 in Mathematics

The continents are 'randomly' drifitng due to planet tectonics.
('randomly' is in quotes because I do not know what it means.
Perhaps independently and not interacting, except when collide and bounce off)

What is probability that at given moment of time there is a pair of diametrally opposite points both on land?

2007-11-13 09:32:10 · 4 answers · asked by Alexander 6 in Mathematics

Can someone please help me understand what is it exactly that a Transmission Engineer does? In the simplest possible way?

2007-11-13 09:27:53 · 2 answers · asked by Radio Flyer 3 in Engineering

human body temperatures usually distributed with a mean of 98.6 F and a standard deviation of 0.72 F. Find the temperature that seperates the top 7% from the bottom 93%

2007-11-13 09:26:17 · 1 answers · asked by Eugene D 1 in Mathematics

2007-11-13 09:23:53 · 4 answers · asked by Ariel I 1 in Zoology

2007-11-13 09:19:11 · 6 answers · asked by Anonymous in Physics

2007-11-13 09:18:54 · 3 answers · asked by canadiangeoguy 2 in Chemistry

A tip in a restaurant is often 15% of the cost of the meal. If your bill is $6.79, what will be your total cost, includin tip?



4.75% =


75% of 40 =?


As a fraction in lowest terms, 80% =?


Which number does not represendt one thousandth
1/100
.001
10^-2
.1%



.72 x 10 ^ -5


The length of your calculator would most likely be measured in????

2007-11-13 09:18:25 · 5 answers · asked by Anonymous in Mathematics

2007-11-13 09:17:04 · 6 answers · asked by canadiangeoguy 2 in Chemistry

Before distributing electric power to consumers?

2007-11-13 09:16:38 · 2 answers · asked by Alexander 6 in Engineering

2007-11-13 09:15:56 · 3 answers · asked by chica magneta 1 in Chemistry

Is it possiable to have tornados in the winter in Minnesota ?

2007-11-13 09:15:17 · 4 answers · asked by Anonymous in Weather

links would be welcomed as well. whoever has the most info gets the no-prize. i have to get some research done and if i stare at this computer any longer my eyes are gonna melt

2007-11-13 09:15:05 · 3 answers · asked by Anonymous in Astronomy & Space