Physics - January 2007

Nothing can travel faster than the speed of light, as general relativity requires. Quantum mechanics shows us that quantum states can change instantaneously at opposite ends of the universe. Does this not prove the existance of an extra dimension?

Space and time warp, creating short cuts, but this doesn't explain how every point in the universe is next to every other point as the quantum experiments show. The extra dimension could be like a point, where everything touches everything else in the 5th dimension, but the 4 dimensions (including time) contain the familiar speed of light restrictions.

What do you think?

2007-01-23 21:03:50 · 4 answers · asked by Michael B 2

I think damage done is momentum (mass X velocity). Is it true? If else, what is it?

2007-01-23 20:38:42 · 6 answers · asked by Intensive 2

because my teacher says that
"posible live on jupiter

2007-01-23 19:49:16 · 8 answers · asked by maria desiree 1

The derivition is confusing.
E= mc^2= hf
Wavelength * f= speed
on equating, we get
wavelength = h/mc
then c is replaced by Velocity of the body.
Isn't equating the mass energy relationship, with frequency energy relationship, wrong. Please explain in detail.
contact me at pranavdpp@gmail.com
How can this be done?

2007-01-23 19:43:47 · 2 answers · asked by D 2

2007-01-23 19:42:15 · 8 answers · asked by leon_hee 1

I know ordinary lightning can be several miles long, 'positive' lightning something like 20 miles. In space is it simply a matter of the voltage potential between 2 points? Could a bolt of 'lightning' be 100 miles long? A thousand? Could lightning jump between planets? Is there any upper limit?

2007-01-23 19:39:30 · 5 answers · asked by AmigaJoe 3

a skier launches off a hill with a horizontal speed Vo. the hill below slopes away at an angle theta.
a) derive an equation for d, the distance down the hill whee the skier lands in terms of Vo and theta.
b)if the skier on the next jump increases Vo by 5%, by what percentage does the distance traveled increase?

2007-01-23 19:36:07 · 3 answers · asked by Anonymous

along a wire. find a. the total charge passing the cross section b.the time at which exactl 1c has passed c.the current at t=5s, d.the current at t=8s

f(t)= 10e^(-t/4), 0<(less than or equal to)t<8
0.667(10-t), 8<(less than or equal to)t<10
0, t>(greater than or equal to)10
0, t<0

2007-01-23 19:32:37 · 1 answers · asked by may 1

One twin goes into space at speed c while other stays back on earth. When the traveling twin returns back to earth he will be younger.

BUT my argument is that the traveling twin can observe that his twin brothers(on earth) clock is slower. So what i feel is that oneday when he returns the guy who was on earth has to be younger. But books state the other way round...... and say something about the acceleration and force of the traveling twin makes him younger!
Im totally confused on how acceleration/force has effects on his age??

2007-01-23 19:32:28 · 7 answers · asked by sh 1

And how does it behave in spatial relativity?

2007-01-23 19:11:50 · 8 answers · asked by Anonymous

I'll really appreciate it if someone could solve this.
----
A scaffold is constructed by placing two supports under a 5 meter long plank. One support is located at the left end of the board while the other is located 3 meters from the left end. The board has a mass of 100 kg. and on the plank is a painter whose mass is 60 kg. The painter stands 2 meters from the left end of the scaffold.
Illustration:
http://i115.photobucket.com/albums/n305/jlsilo/illustration.jpg
a) What is the total weight of the painter and the plank?
b) What total force must the two supports provide to hold up the scaffold?
c) How much of the totl weight is on each support?

The painter begins to walk towards the right end of the scaffold.
illustration: http://i115.photobucket.com/albums/n305/jlsilo/illustration2.jpg
a) How far will he get before the scaffold begins to tip?
b) If you were in charge of safety on this operation, how would you change this scaffold to prevent a possible accident?

2007-01-23 19:11:16 · 1 answers · asked by Robert G 1

2007-01-23 19:10:27 · 2 answers · asked by hello!!!! 2

2007-01-23 19:10:07 · 6 answers · asked by sam 1

which is fastest? i think the top athletes in each sport can surpass 100MPH. is it coincidence that they reach a similar speed? wouldn't a racket or stick give more leverage to increase the speed?

2007-01-23 19:01:05 · 4 answers · asked by 6speed 2

2007-01-23 18:12:02 · 4 answers · asked by Anonymous

2007-01-23 17:49:50 · 7 answers · asked by Anonymous

2007-01-23 17:28:32 · 4 answers · asked by Anonymous

I heard that microwave use radiation to cook food, can the radiated food be unhealthy to eat?

2007-01-23 17:26:58 · 7 answers · asked by Lai Yu Zeng 4

2007-01-23 17:19:54 · 15 answers · asked by Neeraj A 1

2007-01-23 16:59:21 · 4 answers · asked by andrew c 1

A ball is thrown upward with an initial velocity of 14 m/s. Using the approximate value of g = 10 m/s2, what are the magnitude of the ball's velocity at the following times?
(a) 1.05 s after it is thrown upward?
m/s
(b) 2.05 s after it is thrown downward?
m/s

2007-01-23 16:15:09 · 3 answers · asked by bibun 2

Some equipment such as tap recorders, video cameras, other stuff can pick up sounds far away. Other equipment such as public address and other you have to get up close to pick up sounds. How that be possible?

2007-01-23 16:09:09 · 1 answers · asked by Mattman 6

So what color would represent nothingness? White or black?

2007-01-23 16:06:06 · 11 answers · asked by Jay 6

if i made a sleeve for an external hard drive, what could i make it out of that would block magnetic waves? (even if i dropped an industrial strength magnet on to it by mistake)

2007-01-23 15:12:27 · 4 answers · asked by Anonymous

virtual images?

2007-01-23 14:53:06 · 1 answers · asked by Linda 1

2007-01-23 14:09:56 · 4 answers · asked by Jack S 5

I was thinking that each demension means a force of the universe ex. gulon, graviton, electron and so on...

2007-01-23 14:02:30 · 4 answers · asked by Anonymous

these are what to choose from!
A.) state the hypothesis
B.) state the problem
C.) analyze the data
D.) make observations

2007-01-23 13:51:28 · 15 answers · asked by krysdizzle_2006 1

Someone sent me this and I couldn't believe it. Look at the bottom right frame, near the end there is some weird unidentified movement.

You can hear it moving too if you have sound up.

http://www.youtube.com/watch?v=bbXXHKls06E

2007-01-23 13:45:05 · 14 answers · asked by Oliver S 2

2007-01-23 13:42:11 · 6 answers · asked by kittykathunk 3