Physics - July 2006

This is not a joke question. I saw a Horizon programme about a year ago about the possibility of time travel, and the last 10 minutes or so were all about the possibility of us being part of a virtual reality programme. Apparently lots of high-level scientists are looking at this seriously. Statistically, the chances of us being "real" as opposed to virtual are actually billions to one against. What do other people think.

I have to say, that I'm a reasonably sensible person - and I was pretty swayed by what they were saying.

2006-07-11 07:10:53 · 22 answers · asked by Hello Dave 6

The Lorentz Transformation for a time interval has the term (1-v2/c2). This goes to zero for the coordinate system moving along with a photon. If a photon does not experience time, yet we can measure the time it takes for a photon to transverse an interval, can a photon actually be a valid model for light?

2006-07-11 05:58:45 · 13 answers · asked by dhwrenchmsn 1

would u be sucked n or would the swings hold u down

2006-07-11 05:43:55 · 16 answers · asked by Anonymous

just how much time just the freefall nothing else

2006-07-11 05:41:40 · 9 answers · asked by Anonymous

2006-07-11 04:54:17 · 5 answers · asked by Nik C 1

According the Newton’s first law we should feel the inertial force of any acceleration. It is supposedly inescapable right? So where is the inertial force of the accelerated expansion of the universe? My guess is that we do experience this as gravity. If we could figure out the force of inertia created by the acceleration of the expansion of the universe would it be equal to the gravitational constant?

I’ve asked this question three different ways now and still don’t have any answers to it besides foolish ones left by children or pompous ones left by elitists who feel I need ten more years of education and a dictionary (I spell checked it this time! OK???) before I'm even allowed to ask such a question. Can anyone answer this question for real?

2006-07-11 04:06:49 · 18 answers · asked by Anonymous

2006-07-11 03:59:18 · 11 answers · asked by All toxic 1

2006-07-11 03:54:48 · 2 answers · asked by Anonymous

2006-07-11 03:52:58 · 3 answers · asked by Anonymous

2006-07-11 03:51:28 · 8 answers · asked by negin s 1

Units and Measurements

2006-07-11 03:51:01 · 3 answers · asked by Anonymous

2006-07-11 03:37:25 · 9 answers · asked by Sweetlemonman 4

Can a vector in any case can have a component perpendicular to it?

2006-07-11 03:28:28 · 5 answers · asked by Anonymous

2006-07-11 03:27:55 · 18 answers · asked by CoolHardik 1

A definition question in gravity.

2006-07-11 03:24:26 · 3 answers · asked by kemaneci 1

Why do we not feel air pressure when it is so great and that it is exerting on us?
Issit becos of the air pressure in us?
Please justify your answer.

2006-07-11 03:00:45 · 13 answers · asked by noob 1

has it got sth to do with the water pressure it has to withstand?

2006-07-11 02:55:42 · 13 answers · asked by noob 1

2006-07-11 02:49:02 · 9 answers · asked by Anonymous

2006-07-11 02:45:55 · 3 answers · asked by me 5

2006-07-11 02:41:04 · 3 answers · asked by Anonymous

2006-07-11 02:21:44 · 10 answers · asked by Anonymous

2006-07-11 02:14:41 · 16 answers · asked by Anonymous

If the useable energy of a system must decrease then how will fusion satisfy our energy needs? Somewhere in the system more energy must be required than is generated from the system. I am thinking fusion energy may not be the saviour we expect it to be.

2006-07-11 02:05:44 · 7 answers · asked by rshelton3000 1

2006-07-11 01:50:52 · 9 answers · asked by Bien G 1

2006-07-11 01:22:24 · 7 answers · asked by nomad 3

is it amplitude or frequency? if Any why ?can you tell me roughly how much electricity is produced in a thin wire oflength 1metre, amplitude 1cm and frequency 1000hz if it has high tension like in a steel wire ?Is there any equation relating these quantities

2006-07-11 01:15:16 · 2 answers · asked by Ayyagari S 2

If you have lots of atoms etc whizzing about all over the place, that is kinetic energy isn't it?
If that is energy, what is stopping us from tapping into it as a power source (and I'm not talking about static electricity or friction)?

2006-07-11 01:00:27 · 10 answers · asked by cragoogle 1

When I was at school I was told that all matter has energy in it, and that energy is released and not created.
What I'm wondering is, is that true? Do all objects have energy in them, even when stationary and not plugged into something?
Also - in 200 years time, would such a notion as matter having energy in it be regarded as something silly that we thought of in the past before we knew different?

2006-07-11 00:56:57 · 12 answers · asked by cragoogle 1

Only if the energy remains balanced in the positive, I believe, can the motion continue.

2006-07-11 00:39:59 · 6 answers · asked by BRAUNNN 1

http://answers.yahoo.com/question/index?qid=20060711035256AAr7g3h

2006-07-10 23:59:21 · 3 answers · asked by me 5