Physics - June 2007

2007-06-10 14:54:15 · 10 answers · asked by puma 1

2007-06-10 14:46:56 · 7 answers · asked by Anonymous

so the theory is the higgs boson particle gives all fundemental particles their mass..so what was the particle before the higgs boson gave it its mass?

2007-06-10 14:40:17 · 1 answers · asked by Anonymous

2007-06-10 14:33:01 · 5 answers · asked by Anonymous

2007-06-10 14:01:55 · 4 answers · asked by Anonymous

A car travels at a constant speed around a circular track whose radius is 2.6 km. The car goes once around the tract in 360s. What is the magnitude of the centripetal acceleration of the car?


Ok so
r=2.6 km
t=360 s

ac=v^2/r

so first we find the velocity with 2pir/T = 2pi(2.6)/360s=.045m/s

then to find the ac its .045^2/2.6=7.78x10-4 m/s^2?

2007-06-10 13:54:10 · 3 answers · asked by Kel 1

how can a i find the friction coefficient in a kinetic example.. the data i have is:
t=0.40s
d=0.35m
m=0.13kg
Vi=0 m/s
Vf= 1.1 m/s
a=2.75 m/s^2
F= 0.36 N
angle=25º

the materials are plastic wheels (the object used was a little toy car, and it had plastic wheels) and wood....
the situation was that the toy car was let to fall down the wood inclined plane...

2007-06-10 13:08:29 · 2 answers · asked by monica 2

When a particle is energized, say in an accelerator, increasing its apparent mass (m=E/c^2), does gravitational mass also increase or does it remain the same as non energized mass? If gravitational mass increases, can it ever become so massive that it forms a mini black hole that grows and swallow everything in its path?

It seems unlikely since outer edges of the universe has high energy (moving away from us at high speed), yet their gravitational pull is the same as if they are not moving or do they have higher apparent gravity? Is gravity dependent on mass, and not mass energy? If so, then mass and energy are not interchangeable; in that case, is gravity is destroyed when mass turns to energy?

2007-06-10 13:04:05 · 1 answers · asked by Mik K 2

How could it be a slow, painful process? Or maybe something quick...

2007-06-10 12:47:39 · 5 answers · asked by KingKong 2

an age old question. personally i think its possible to go fowards and backwards in time, however i wud like to hear from postgraduates on how this is possible

2007-06-10 12:44:38 · 9 answers · asked by g g 2

I read that there are x number of atoms in the universe.

I also read that the universe is infinite.

How can there be a finite number of atoms in an infinite space? Wouldn't that mean atoms would be so rare that statistically, atoms would never ever come into any kind of close proximity to each other? Or would it mean that were in the mist of an atom soup, and beyond it is space but an infinite amount of it, giving us basically an 'edge'?

2007-06-10 12:42:54 · 4 answers · asked by Anonymous

I need them for a school project, where can I find them?

2007-06-10 12:39:22 · 2 answers · asked by Mary08 1

So far, Im aware of a few :

1) Pre big bang, what happened, what kicked it off, is it even knowable.

2) What is the reason certain constants are the value they are? For example, why does light go as fast as it does? Yes I know you could say it's based on properties of a vacuum, but if you dig, you come to a constant eventually, and it is these 'unbreakable', or 'prime number like' constants that just happen to be as they are with no known reason.

I know there are questions about gravity, and its details, what are they?

rant on :
The current standing of physics seems to be much like the very early 1900s. Everything seems about ready to wrap up, except for a feeeew teeny weeny little problems. These small problems were ripped open, exposing a new, fascinating, and deeper understanding of the universe.
rant off. :-)

2007-06-10 12:25:10 · 6 answers · asked by Anonymous

Why lightning always goes downwards?

2007-06-10 12:15:01 · 7 answers · asked by Stergios N 1

If the net force of 7 N was continuously applied on 400 g object at rest, how long will it take to raise its velocity to 80 m/s?

answer is in s (seconds)

2007-06-10 11:23:21 · 3 answers · asked by inzane555 2

2007-06-10 11:05:03 · 10 answers · asked by ebby wiselyn 2

i dont mean any chemical reactions taking place or anything complicated like that just purely mechanical. simply magnets and moving parts put together to produce electricity for the life of the maget.

has anyting like this been build atmpted talked about... anything. please be 100% sure of your answeers

one more thing, if some i had an idea on how i might go about making a machine like that what advise can u give me about how to go about it, what its im plications might be... all that good stuff.

2007-06-10 10:59:54 · 7 answers · asked by LUKE D 1

And how did you figure that out?

2007-06-10 10:50:29 · 5 answers · asked by Anonymous

I know that white light is a mixture of all the other colours of the visible spectrum...but I really need to know the exact wavelength of white light in NANOMETRES....Please help!!!

2007-06-10 10:49:45 · 6 answers · asked by Urvashi B 2

E=hf=mc^2. If a photon of sufficient energy impacts a particle, can that particle turn into a back hole? If so, would that "mini" black hole gobble up other particles around it and grow, eventually swallowing everything it its path?

Given the statistical nature of quantum world, what possibility would there be to have such high energy photons generated by current technology? ie, what energy density do we typically generate in the lab, and what chance is there that such high energy photon is generated?

2007-06-10 10:43:52 · 4 answers · asked by Mik K 2

maximum velousity

2007-06-10 10:39:26 · 3 answers · asked by Anonymous

2007-06-10 10:09:17 · 4 answers · asked by .... 2

2007-06-10 10:05:27 · 3 answers · asked by .... 2

In the following diagram, each blue line is 24 centimetres long, and the red line is 16 centimetres long. Assume the shape in the centre of the circle is a perfect square, and it is exactly centred in the circle. Also assume that all three coloured lines are parallel to each other.
picture below:
http://i70.photobucket.com/albums/i103/azian_dreamz/217_squarecircle.gif

2007-06-10 10:04:01 · 3 answers · asked by Milli 1

How can those windmills work? It appears to be NOT windy, yet they still move. Why is that?

2007-06-10 09:08:04 · 4 answers · asked by Anonymous

I am stuck on this problem and would be really greatful with any help on it.

Find the current in the 12 Ω resistor shown below (where: R1 = 2.2 Ω, R2 = 8.6 Ω, V = 24 V).

http://www.webassign.net/sercp/p18-13alt.gif

2007-06-10 09:08:03 · 4 answers · asked by Anonymous

How would you know if you do not know how many dimensions there are, and have not gone to each one to test the theory ?

dave

2007-06-10 08:51:01 · 5 answers · asked by dave777 4

look through one side of a pair of binoculars n' see everything right side up?

2007-06-10 08:44:15 · 5 answers · asked by Anonymous

2 teams of childeren playing tug of war are well matched, and they pull on the rope with exactly the same force. They have placed a 65N weight in the center of the rope. The teams first pull with 750N of force each, then in a heroic effort to straighten the rope, pull with 1,500N of force.

What is the angle of the rope makes with the horizontal with

A) a force of 750N on each end of the rope?
B) a force of 1500N on each end.

I am having a hard time understanding this one...so if you could provide details, that would help a lot. One thing is that the children are applying force in opposite directions...so the total for does not = double one side, right? Or because the force is placed on the 65N weight----do you add the force from each end. Anyway details would help. thanks

2007-06-10 08:00:04 · 4 answers · asked by None 1

Sorta an armchair physicist / philosopher. Due to the consequences of changing these values, it begged to be asked.

2007-06-10 07:03:30 · 5 answers · asked by Anonymous