Science & Mathematics - 6 December 2007

2007-12-06 07:33:08 · 4 answers · asked by Jay D 1 in Astronomy & Space

Using a force platform it's been found that when people jump straight up as high as they can they exert a net downward force for much of the time equal to about 2.3 times their weight. Approximately what acceleration do they achieve?

2007-12-06 07:30:58 · 1 answers · asked by Anonymous in Physics

Just a curious paranormal researcher getting the general public's Theories? :) and what is your guys opinon on why ghosts exist how about this one if you can't answer the others what is the most common paranormal activity (Not just ghosts) takes place in a location claimed to be haunted ? Thoughts?

Ryan
Lead Investigator
T.H.E. P.R.O.S.
Team Hunting Evidence of Paranormal Research Occurrences Society
~www.theprosonline.com~
*Please Sign Guestbook*

2007-12-06 07:27:39 · 6 answers · asked by teamhuntingevidenceofparanormal 2 in Paranormal Phenomena

My friend said that the world is going to end in2014. She said that there was this guy that predic that the 9-11 was going to happened,and the terrouis attact. And all he said was ture.

2007-12-06 07:24:48 · 62 answers · asked by Jessica W 1 in Astronomy & Space

any memory ideas?

2007-12-06 07:24:18 · 3 answers · asked by LOL 1 in Geography

Just need to know for my metal tech teacher.

2007-12-06 07:23:42 · 5 answers · asked by Stephen 2 in Physics

I have to do make a model of a desert for my environmental sci class

2007-12-06 07:22:03 · 9 answers · asked by babykhi16 2 in Earth Sciences & Geology

I think you use U-substitution but I'm not quite sure how to work it. Could somebody show me this problem step by step?
And no this is not a homework question, I'm studying for my final that I have tomorrow. Thanks in advance to all.

2007-12-06 07:21:49 · 5 answers · asked by brian 2 in Mathematics

2007-12-06 07:16:25 · 6 answers · asked by Anonymous in Mathematics

My partner and i timed how long alieve (the medicine) takes to dissolve in different liquids with different phs, but are project needs relevance and it doesnt make since with reation rate. This project makes since with solubiliy as my teacher told me but I DONT KNOW HOW.!PLEEASE HELP!

2007-12-06 07:13:51 · 4 answers · asked by Anonymous in Chemistry

What colour would it be?

2007-12-06 07:12:56 · 20 answers · asked by Anonymous in Astronomy & Space

Can you help me i have one, SALT. What are some other components in the ocean. I need this for a science project.

2007-12-06 07:11:41 · 4 answers · asked by Anonymous in Earth Sciences & Geology

is there gravity on any of the other planets out there?

2007-12-06 07:08:10 · 11 answers · asked by pyarali2 1 in Astronomy & Space

First of all, I want this to be theoretical. I know we are perhaps centuries from this sort of technology.

But could it be possible? And how would the sciene behind it work? I'm talking about the sort of thing where you step into a Jetsons-like tube, press a button, and vanish. You then materialize elsewhere.

2007-12-06 07:07:36 · 4 answers · asked by Anonymous in Physics

this is supposed to be on physical and chemical changes in matter.
...its saturday morning and your decided to make breakfast for your family. You prepare fresh cut fruit, fried eggs and bacon, toast with melted butter, fresh squeezed O.J. and coffee.....
decribe the four chemical and four physical changes that take place as you prepare the meal

thank you soooo much
=]

2007-12-06 07:05:06 · 1 answers · asked by Anonymous in Earth Sciences & Geology

When Water boils it bubbles where milk does not?why

2007-12-06 07:02:32 · 2 answers · asked by mohanlifeisbeautiful 1 in Biology

What is the normal events when someone has a very high fever. Are they always sweaty? Or are they just very hot to the touch, and they can't sweat?
Also, if the person sweats during a fever, when does the sweating start -- before or after the fever breaks. Im not even sure what is meant by a fever break.
Do people sweat profusely in the presence of infection in the body?

2007-12-06 07:02:21 · 6 answers · asked by Anonymous in Medicine

The following processes occur spontaneously at 25 °C. Which of these processes are endothermic?

1.the combustion of methane to produce water and carbon dioxide
2.the expansion of an ideal gas into a vacuum
3.the melting of ice

a.3 only
b.2 and 3
c.2 only
d.1 and 2

2007-12-06 06:58:26 · 1 answers · asked by Anonymous in Chemistry

Someone asks: Can a bullet have the same momentum as a truck? You would be right if you said which one or more of the following:

a. Yes, and if so they will both impart the same impulse in a 2-to-1 interaction.
b.No, because the bullet's mass is so much smaller.
c.Yes, by having a higher velocity than the truck.
d.Yes, but only if the impulse imparted to the bullet was larger.

2007-12-06 06:57:45 · 4 answers · asked by Nicky 1 in Physics

I'm just doing this for fun, can someone tell me what angle is needed for an object to reach 12 feet? Even better, can someone show me how?

2007-12-06 06:56:38 · 1 answers · asked by Anonymous in Mathematics

2007-12-06 06:55:35 · 3 answers · asked by lil one 1 in Weather

how much space does jailbreaking take up of my 8 GB. say i wanted to add tap tap revolution or somthin. does it waste my space? how much?

2007-12-06 06:51:52 · 3 answers · asked by Evan S 2 in Astronomy & Space

A 3.0 kg block is attached to a string that is wrapped around a 2.0 kg, 4.0-cm-diameter hollow cylinder that is free to rotate. The block is released 1.0 m above the ground.


Also need to:
Use conservation of energy to find the speed of the block as it hits the ground.

2007-12-06 06:50:47 · 2 answers · asked by Michelle W 1 in Physics

I need this for a report so please answer back a.s.a.p!
<33

2007-12-06 06:50:30 · 5 answers · asked by Anonymous in Zoology

Calculate the standard entropy change for the combustion of methanol at 25 °C.

2 CH3OH(λ) + 3 O2(g) → 2 CO2(g) + 4 H2O(g)

Species S° (J/K⋅mol)
CH 3 OH (λ) 127.2
O 2 (g) 205.1
CO 2 (g) 213.7
H 2 O(g) 188.8

a.-312.9 J/K
b.+70.2 J/K
c.+2052.3 J/K
d.-2052.3 J/K
e.+312.9 J/K

2007-12-06 06:50:28 · 1 answers · asked by Anonymous in Chemistry

I got a 70% in typing class. The passing grade is 60%. 100% is 46 words per minute.

Assume that errors don't exist.

2007-12-06 06:48:34 · 9 answers · asked by Melissa 2 in Mathematics

I have a 2 page report on black holes due tomorrow and was wondering where online could I find info about it.

2007-12-06 06:48:08 · 5 answers · asked by The Chief 2 in Astronomy & Space

2007-12-06 06:48:00 · 4 answers · asked by loveitorleaveit2010 1 in Mathematics

If it was possible to drill a tunnel through the earth from one end to the other and jump into it, what would happen once we reach the core of the earth? Would we fall to the side, float motionless or what? Since gravity pulls you to the center, what would happen once we reached the center if jumping from either end of the tunnel will make you fall..... ?

Answer that......

2007-12-06 06:46:55 · 7 answers · asked by DeFoNLooK 1 in Physics

can someone give me the steps to the solution of this equation. In the book the solution is done through dividing the equation by (x+1). Why?

thank u

2007-12-06 06:46:11 · 3 answers · asked by Fellow 1 in Mathematics