Physics - May 2007

2007-05-31 23:26:37 · 12 answers · asked by ges952 1

2007-05-31 23:13:13 · 9 answers · asked by Shirin 2

That is, if one isolated a single molecule and suspended it in the middle of a vacuum with some kind of magnetic fields, would the molecule still vibrate despite not colliding with other particles? That is, is vibration inherent of all molecules even those that are isolated from other matter?

When I think of browmian motion, I think of molecules that are moving as a result of elastic collisions with other particles. Yet do the particles vibrate independently of intermolecular collisions. Please explain my above scenario in the vacuum suspendended above the ground.


Thanks so much to all the people who take precious time out of their days to help me understand my questions!

2007-05-31 22:17:11 · 4 answers · asked by kmm4864990 1

Can you please show me how to solve this question?

2007-05-31 20:42:34 · 9 answers · asked by Molly me 4

Astronomers view light coming from distant galaxies moving away from the Earth at speeds greater than 10% the speed of light. How fast does this light meet the telescopes of the astronomers?

2007-05-31 20:17:48 · 5 answers · asked by Anniepannie06 2

2007-05-31 20:13:03 · 4 answers · asked by Akash R 1

I been have doing some studying on Quantum Mechanics but I dont really understand how it affects and effects me and the world....

2007-05-31 20:12:51 · 2 answers · asked by SupDawg 1

i was wondering if it would be possible to "move" accros the universe faster than the speed of light if one did not truly move but however caused a distorsion of spacetime and caused space to expand behind one and space to contract in front of one thus moving but not acctually "moving"

2007-05-31 20:05:45 · 7 answers · asked by indian340 2

The bus in the previous problems is 70 feet long, according to its passengers and driver. What is its length from your vantage point on a fixed planet?
(The previous problems were:
-A passenger on an interplanetary express bus traveling at v=0.99c takes a five-minute catnap, according to his watch. How long does the nap last from your vantage point on a fixed planet?
and..
-According to Newtonian mechanics, the momentum of the bus in the preceding problem is p=ymv. How does the actual momentum of the moving at 0.99c compare with the momentum it would have if classical mechanics were valid? How does the momentum of an electron traveling at 0.99c compare with its classical momentum)
Please just help with first one

2007-05-31 19:58:12 · 2 answers · asked by Anniepannie06 2

2007-05-31 19:08:54 · 8 answers · asked by abid 1

A. blue-violet
B. orange-green
C. red-orange
D. green-blue
E. none of the above

2007-05-31 18:39:01 · 6 answers · asked by Pradeep k 2

Based on my understanding of both light and gravity, then I have developed two theories, which are mutually exclusive, but should one be proven wrong then the other should, in theory, be proven right.

It is widely accepted in modern times that nothing can travel faster than light, and that light itself cannot be sped up or slowed, unless it travels through a different medium. With this in mind, I began to think about the bending of light as it passes a planet. This can only happen one of two ways. Either gravity pulls on it, or gravity refracts it. If gravity pulls on it, then in theory when light is approaching a black hole straight on it should at some point begin to speed up, therefore proving Einstein wrong and me right.

If it is refracted by gravity instead, this would lead to the assumption that gravity is material, and is a medium through which light travels. As light passes into thicker parts of the medium I.E. around planets, it would then refract.

What do you think?

2007-05-31 18:27:44 · 3 answers · asked by darnianlow 2

Why do concave mirrors show images up side down and why do convex show images right side up?

2007-05-31 17:10:50 · 8 answers · asked by Anonymous

other than the obvious , due to wind

2007-05-31 16:57:03 · 3 answers · asked by Anonymous

What is the mass of this volume of water in kilograms and grams?

2007-05-31 16:30:22 · 4 answers · asked by carlita8706 2

2007-05-31 15:24:53 · 5 answers · asked by real question 2

A Van de Graaff generator is charged so that the electric field at its surface is 2.6*10^4 N/C.

(a) Find the electric force exerted on a proton released at its surface.

(b) Find the acceleration of the proton at this instant of time.

2007-05-31 14:16:19 · 3 answers · asked by Anonymous

A lamp filament is made of tungsten. When made to glow, it emits a continuous spectrum-all the colors of the rainbow. When tungsten gas is made to glow, however, the light is a composite of very discrete colors. WHy is there a difference in spectra?

2007-05-31 13:56:49 · 3 answers · asked by Anonymous

2007-05-31 13:42:30 · 6 answers · asked by Anonymous

An object with an initial speed of 5 m/s moves under constant acceleration. Five seconds later its velocity is 10m/s. how far did it travel during this time?
_
(Using equation v = (Vo + Vf) / 2 )

2007-05-31 13:03:31 · 3 answers · asked by Tech19 3

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

An electric car is designed to run off a bank of 12.0 V batteries with a total energy storage of 1.90 x 10^7 J.

a) If the electric motor draws 6.00 kW, what is the current delivered to the motor (in A)?

b) If the electric motor draws 6.00 kW as the car moves at a steady speed of 20.0 m/s, how far will the car travel before it is out of juice (in km)?

2007-05-31 13:03:02 · 1 answers · asked by Anonymous

2007-05-31 12:37:08 · 9 answers · asked by clashinggrandeur 1

What does the relationship between voltage and current represent for a given resistor?

2007-05-31 12:12:11 · 2 answers · asked by de4th 4

please i need this answered by 9:00 tonight because i have exams tomarrow and it's one of the questions. please help me
thank you

2007-05-31 11:57:04 · 8 answers · asked by summer_lover_13 1

1. what are the difference between AC and DC and the manner in which each can be produced?
2. Why are baterries DC rather than AC?
3. How are generators and motors related?

2007-05-31 11:44:43 · 4 answers · asked by no name 1

Events seen when movie is played bacwards look funny.
What laws of physics are possibly violated by inverson
of time?

2007-05-31 11:44:12 · 7 answers · asked by Alexander 6

What causes this type of wave?

2007-05-31 11:43:10 · 3 answers · asked by kevster1020 2

thanks =]

2007-05-31 11:34:16 · 1 answers · asked by Anonymous

2007-05-31 11:11:31 · 8 answers · asked by Perky 1

Hello. When you want to check whether a collision is elastic or inelastic you use the principle of conservation of momentum to find the speed after the collision. I dont understand the following:
If momentum is conserved how can Energy not be conserved? I mean Energy is linked to the speeds of the paricles - if the speeds decrease then and only then would energy be lost but if they decrease momentum is not conserved. I dont get it. Whow can sometimes momentum be conserved and energy as well and sometimes only momentum. I know that momentum is always conserved but then when energy is lost where does thie enery come from? It cannot be just created?

2007-05-31 10:52:15 · 4 answers · asked by Simeon S 1