Physics - August 2007

If so, what happens?

2007-08-18 10:25:24 · 8 answers · asked by Anonymous

Time dilation is the phenomenon whereby an observer finds that another's clock which is physically identical to their own is ticking at a slower rate as measured by their own clock. This is often taken to mean that time has "slowed down" for the other clock, but that is only true in the context of the observer's frame of reference. Locally, time is always passing at the same rate. The time dilation phenomenon applies to any process that manifests change over time.

I would like to understand why this occurs...not just the phenomenon itself.

2007-08-18 09:55:05 · 5 answers · asked by Gary 1

2007-08-18 09:51:22 · 7 answers · asked by Anonymous

To me, this is an interesting topic. Could discovering the secrets of dark matter eventually lead us to the secret of how to transport ourselves through time?

2007-08-18 09:12:28 · 5 answers · asked by kriend 7

Maybe dark matter is a type of unknown, unnamed gas!

2007-08-18 09:03:32 · 7 answers · asked by kriend 7

http://www.mufor.org/nmachine.html

Is there any truth in the article linked above, or is it pure science fiction?

2007-08-18 09:03:09 · 4 answers · asked by Perplexed Bob 5

Would it pass thru without shattering the glass? or would the glass break?

2007-08-18 07:50:51 · 10 answers · asked by ROCO 2

2007-08-18 07:44:12 · 2 answers · asked by lackjc2004 1

2007-08-18 05:17:35 · 9 answers · asked by Anonymous

Please show me how to simplify the above problem.

2007-08-18 05:02:06 · 3 answers · asked by Anonymous

Hey have fun with this please...and remember, if yu go back and change something you may not be born to travel back and change things...

2007-08-18 03:35:58 · 11 answers · asked by bruce b 3

2007-08-18 03:13:42 · 1 answers · asked by Ronald C 1

Volts or amperes?

2007-08-18 02:49:26 · 11 answers · asked by captbullshot 5

2007-08-18 02:36:40 · 8 answers · asked by Ram 1

When I drop a tennis ball with a spin (vertical axis of rotation), I've noticed it rotates much slower after the bounce.

Is this just due to energy loss upon contact with the floor?

And is the fraction of linear kinetic energy just before to just after the bounce equal to the fraction of rotational kinetic energy just before to just after the bounce?

2007-08-18 02:35:20 · 9 answers · asked by Anonymous

What's the relationship between the image distance from the lens and the nature of the image produced of a converging lens? Is there any easy way to remember it?

2007-08-18 00:25:14 · 1 answers · asked by whatagowk 2

well its true were does it go its got to go some were

2007-08-18 00:09:34 · 23 answers · asked by Anonymous

2007-08-17 23:34:19 · 13 answers · asked by Mc Durst 2

2007-08-17 22:46:39 · 9 answers · asked by ravi 2

A small vehicle of mass 640 kg is powered by a battery-driven electric motor. The total frictional resistance to motion is 200 N. The car moves up incline at a steady speed of 2.0 m/s.

(There is a diagram provided whereby a right angle triangle is drawn. And the vertical height is 10 m and the hypotenuse is 160 m.)

Calculate

(a) The total work done in bringing the car to the top.

(b) The power the motor must develop to propel the car up the incline.

2007-08-17 22:29:54 · 1 answers · asked by whatagowk 2

it would be better if it is about electromagnetic waves or about optics

2007-08-17 21:12:58 · 4 answers · asked by Anonymous

The hole is 50ft diameter. The hole goes entirely through the Earth from North Pole to South. you drop ball in center of hole.

2007-08-17 19:10:59 · 5 answers · asked by G 1

Hi, in my physics book (serway) they say "dimensions can be treated as algebraic quantities" but I don't understand this very well. If I sum meters I get meters, if I multiply meters I think I get meters^2 because the area of a rectangle is b.h. But if, for instance, I multiply seconds.seconds I don't uderstand why I get sec^2.

Algebraically x.x = x^2 but x represent a a number not time, weight, etc.

I see it like 3 apples x 2 apples = 6 apples^2.

Probably I'm getting this wrong, Could you help me to understand this right please?

Excuse me if my english isn't very clear.

2007-08-17 18:29:11 · 3 answers · asked by andacecha 2

Vesel thermally insulated contain 2.1 kg H20 & 2.kgice. all at 0c the outlet of tube leading from a boiler in which water is boiling at atmospheric pressure is inserted into the water how many grams of steam must becondense inside the vessel to raise the teperature of the system to 34 dgree celcius. neglect the theat transferred to the container

2007-08-17 18:01:55 · 2 answers · asked by kuti boy 1

there have been so many books published recently in the field of cosmology and quantum science etc., but none that I know of in the chaos field.

2007-08-17 17:43:25 · 2 answers · asked by sst307 1

I've seen web vids of people using green lasers to pop balloons from a short distance. I've seen some 5mw, 532nm green laser pointers that run anywhere from $10-$20 on ebay. Would those be able to to do this? How close would I have to be to pop a balloon? Also, how does a 5mw differ from a 10 or a 15? Thanks.

2007-08-17 17:42:44 · 0 answers · asked by evilknightsword 1

I know the formula of Newton's theory (and the basic principles of Einstein's more recent theory of relativity), but can someone help me to get my head around the main premise of what actually causes this force we call gravity? I am having a hard time conceptualizing it and understanding why it occurs...

2007-08-17 17:38:20 · 11 answers · asked by whitehorse456 5

2007-08-17 17:15:49 · 14 answers · asked by mahesh s 1

By successful I mean no broken bones and preferably without dying.

2007-08-17 16:54:49 · 7 answers · asked by Veladesity 2

i read from somewhere reliable that lightspeed is considered the fastest speed and you cant exceed it . i think its said by einstein or smething.

why is it so ? just becos currently it appears to be the fastest speed?

2007-08-17 15:54:31 · 9 answers · asked by Curious 3