Physics - August 2007

If the law of conservation is true, then when a cavitation void is forced to form, does surface tension pull free electrons until a state of equilibrium is achieved? Furthermore upon collapse of said void does Boyle's law play a factor? No posers please.

2007-08-05 07:29:24 · 2 answers · asked by high_speed_sly 2

2007-08-05 07:20:16 · 6 answers · asked by pay it forward 1

It is clear that the temperatures and pressures of the different phases are equal, due to the maximum entropy requirement. Though I can't proof why both are known to remain constant during transition.

That apparently holds, if the P(T) curve intersects the curve of phase coexistence at one point only. Then the transition happens at this very point of fixed T and P.

But couldn't one imagine the P(T) curve moving towards the coexistence curve, then moving ON it for a while and then leaving it. The part where both curves show congruence would represent the transition, during which temperature and pressure would change.

2007-08-05 06:53:22 · 2 answers · asked by Nick P 3

Suppose you wanted to do an experiment to find out if changing the weight on the end of the string changed the amount of time the pendulum takes to swing back and forth. Which pendulums would you use for the experiment?

http://i16.tinypic.com/4r24z5x.gif

2007-08-05 06:51:54 · 5 answers · asked by sunsadness 1

Write the equation that shows how radium 226 decays to give an alpha particle and another element?

2007-08-05 06:39:28 · 2 answers · asked by MizzKin 1

could u please make this in easy to understand english? i've read a bunch of sites about it but none of them make since. and made could u give me a link or something?

thanks!

2007-08-05 05:51:09 · 4 answers · asked by Anonymous

2007-08-05 05:12:53 · 4 answers · asked by kathy b 2

Can we conduct electricity without metal wires or a medium?
I mean wireless conduction of electricity?

2007-08-05 05:11:34 · 9 answers · asked by Mahaveer 2

some scientists said that, they think, that if they proofed the the theory of the big bang, then they will also try to proof that the theory of the big bang, will happen but in reverse, meaning the EARTH, will heat up again and then go back to a small, HOOOOOOOOOOOOOOOOOOOttttttttttttttttttttttttttttttt, extremly hot piece of matter, is this true, weell, as for me i think what those scientists said is true, because u have global warming, and apperently, no body is doing anything about it, atleast not EVERY body, so then the theory will happen but in reverse, well, this was just a theory,and also another question will we ever proof enestien's theory, sorry i know alot of complicated questions, but sorry it is never toooo late to learn, LOL to ALL

2007-08-05 04:48:28 · 4 answers · asked by Anonymous

I don't know if I should take this course. I have a good writer (5.5) on FCAT, and taking this along with AP Psychology (rest honors or health),


Is there anuthing that I need to do other than summer reading for prep?

2007-08-05 04:27:23 · 1 answers · asked by ? 1

if you place a paperclip below a beaker, and pour water into the beaker why can't the paperclip be seen from the side of the beaker?

2007-08-05 02:30:59 · 2 answers · asked by Anonymous

THERE ARE THREE SOUCES OF RESISTANCE IN PARALLEL CIRCIUT. TWO OF THEM ARE RATED AT 20 OLMS, THE OTHER AT 10 OLMS. What is the answer?

20 ohms
12 ohms
8 ohms
5 ohms

2007-08-05 02:09:16 · 5 answers · asked by SAMMY 1

I'm writing a story, and there is a part in which I describe a toy.

So, I say:

"It was a water game, which consisted of, after the toy is filled with water, pressing a button, which GENERATED PRESSURE, and trying to insert as many rings as possible into some spears"

The part I would like people to correct is the words in capital letters.

By 'pressure' I mean, that when you press the said button, some 'air bubbles' are generated.
I'm just not sure is the term 'pressure' is correctly used here, because I know that water also exerts pressure over any body, even when there are no 'currents' or other 'forces'...

So, is it correct to say 'generated pressure'? Or would it be better if I said 'generated AIR pressure? (Or should I simply say 'generated air bubbles'?)

***

(If you would like to correct my English, that would be fine as well...
I will have learned two things new, instead of one...)

2007-08-05 02:01:13 · 4 answers · asked by Anonymous

A scientist on the radio told me the energy from the vacuum fired the big bang, but energy is a bit like matter so where did the energy come from, and when?

2007-08-04 23:56:37 · 17 answers · asked by originalthinker 1

And where does the energy that moves repelling magnets come from?

2007-08-04 23:45:42 · 5 answers · asked by Anonymous

2007-08-04 21:49:57 · 2 answers · asked by Anonymous

2007-08-04 21:14:54 · 5 answers · asked by Anonymous

the basic deffination and basic detaills about pressure transducer,of what parts it is made of and what happens when get started

2007-08-04 21:12:25 · 4 answers · asked by fsa 1

can anyone explain to me the effects of alpha, beta particles and gamma ray radiation to our body? regarding their penertrating power and ionizing capacity.

SAID:
A. alpha: very little pentrating power and are able to ionize a large number of atoms within the small area they were able to penetrate.

B. beta: they can penetrate paper or several millimeters of skin and about 1-metre of air. they are absorbed by aluminum or Perspex, a few millimeters thick. their ionizing capacity is less than that of alpha-radiation.

C. gamma: it has no electric charge and has great enetrating power. not even a thicj\k piece of lead or concrete will stop all of them, although, their ionizing capacity is smaller that that of beta-rays.

ASSUME THEY WERE RADIOACTIVE COOKIES CONTAING EACH OF THEM:if you were allowed to eat one, hold one and place one in your pocket, which cookie should be placed where so that you wil receive the least radiation?A B OR C?
EXPLAIN...
WHICH COOKIE IS HARMFUL?WHY?

2007-08-04 21:00:32 · 2 answers · asked by Ninik 3

2007-08-04 20:46:51 · 3 answers · asked by NURUL A 1

suppse you were given the three radioactive cookies, one is mixed with alpha particles, the second with beta, and the third with gamma. You are allowed to eat one, hold one, and place one in your pocket. Which cookie should be placed where so that you will receive least radiation? explain your answer.


can you help me guys?

BEST ANSWER for the one who could givne me the most convincing answer and the very informative one also.

2007-08-04 20:31:39 · 4 answers · asked by Anonymous

1) A current of 84.1 mA exists in a metal wire. How many electrons flow past a given cross section of the wire in 10.6 min?

2) A nichrome wire with a resistance of 18 resistance is conne cted across the terminals of a 24 V flashlight battery. How much current is in the wire? answer in units of A.

2007-08-04 20:31:27 · 2 answers · asked by jay b 1

To be clear, I do not mean via any technological route or any sort of trickery. I mean for instance that I look at the wall beside me - is there anything my mind can do to turn the simple act of paying attention to the wall into actually causing changes within the atoms of the wall - even if only on the subatomic level? That's just an example scenario, feel free to refer to it or to any other mind/matter scenario you wish in your reply.

I'm posting this here instead of the religion & spirituality forums because if it can occur at all, the type of phenomenon I'm inquiring about would be empirically verifiable and thus within the realm of science. Unfalsifiable answers and speculations based on things which are not empirically observable - these things need not apply. ;-)

2007-08-04 20:28:00 · 7 answers · asked by uncleclover 5

Aside from an ordinary clock...

2007-08-04 20:22:02 · 5 answers · asked by Anonymous

You designed a stunt in which a man, who weighs 60 kg, is shot out of a cannon that is elevated 40° from the horizontal. The “cannon” is actually a 0.91-m diameter tube that uses a stiff spring and a puff of smoke rather than an explosive to launch the man. The manual for the cannon states that the spring constant is 1,822 N/m. The spring is compressed by a motor until its free end is level with the bottom of the cannon tube, which is 1.5 m above the ground. A small seat is attached to the free end of the spring for the man to sit on. When the spring is released, it extends 2.7 m up the tube. Neither the seat nor the chair touches the sides of the 3.7-m long tube, such that friction can be neglected. After a drum roll, the spring is released and the man will fly through the air. You have a 0.91-m thick airbag waiting for the man to land on. You need to determine if the airbag is thick enough to stop the man safely – that is, so he is slowed to a stop by the time he reaches ground level

2007-08-04 20:00:45 · 4 answers · asked by Sammy Baby 1

Kindly send me detailed eplanation about it or some link would also do

2007-08-04 19:56:22 · 4 answers · asked by Anonymous

What flame is hotter blue or white, please elaborate...

2007-08-04 19:27:46 · 8 answers · asked by Anonymous

If I was standing on a weight scale on a scaffold 10 km above the Earth's surface, would the scale register less. How about 20 km, 30 km, 40 km, etc.
I am sure there is an equation (that would be hard to understand). Is there a site that explains equations (nice and slow) for something like that.

2007-08-04 17:16:19 · 6 answers · asked by the_brain_in_a_vat 1

where? really good question?

2007-08-04 16:09:30 · 12 answers · asked by FukcingAngel 2

It is said that gravity is a warping of time space by mass, and that is it this warping that explains why the planets orbit the sun, and why light (which has no mass, or does it?!) is able to bend around massive objects like the sun. Surely if this is a true warping, then the effect of gravity would be instantaneous? (rhetorical) But we know its not, because the speed of light is the fastest anything can happen. So is it because this warping alters the rate of time that the effects of gravity do not appear to be instaneous at the massive object? Is it then if you were to step outside of the warped space time area that things would appear faster, perhaps even instantaneous!? Or is it that as a creation of the universe we will never see or even detect such instantaneous effects because we're governed by the same laws such as speed of light? Maybe a universe with a greater maximum speed could detect these 'instantaneous' effects and inform us of their speed, should they be able to exist!

2007-08-04 15:18:07 · 7 answers · asked by silverfox 3