1

Physics, Astronomy & Cosmology / What is the relation between the London effect and the Meissner effect?

« on: 25/11/2011 23:39:18 »

In the gravity probe mission; a perfect gyroscope was used to make measurements relevant to the mission. The gyroscope was added with a layer of niobium, then brought down to low temperatures to allow superconductivity to happen. The London effect makes the niobium ball generate its own magnetic field. How is the London effect related to the Meissner effect(Quantum lock)?

Thanks in advance

edit:
What about the Josephson effect?

2

Physics, Astronomy & Cosmology / Where can I get a gyroscope?

« on: 11/09/2011 00:13:46 »

I recently started to read a book about gyroscopes (Carl Machover), it is very interesting. I would like to understand the precession effect by experimenting with a real gyroscope. I have not had any luck finding one with google; mostly all the hits are about spinning tops.

Does anyone knows where I can get one? (two degree of freedom preferably(economic too))

Thanks

3

Physics, Astronomy & Cosmology / Can you experience negative g's?

« on: 02/11/2010 22:24:52 »

Is there anyway in which you can experience negative g's?

4

Physiology & Medicine / How does the brain process depth perception?

« on: 04/07/2010 05:00:14 »

How does our brain process the information from our eyes to tell the distance away from objects?

5

Physics, Astronomy & Cosmology / what happened to the hadrons whe they collided in the LHC.

« on: 14/05/2010 11:46:55 »

Did the hadrons recombine, or did they desintegrate in dark energy?

6

Physics, Astronomy & Cosmology / How is the International space station built?

« on: 03/04/2010 23:44:02 »

http://i.usatoday.net/tech/graphics/iss_timeline/flash.htm

7

Physics, Astronomy & Cosmology / How to see the dark part of the earth?

« on: 03/04/2010 23:35:06 »

I found this cool site; so here it is

http://www.fourmilab.ch/cgi-bin/Earth

8

Chemistry / Can you turn a liquid into "marbles"?

« on: 02/04/2010 20:12:44 »

Is this true? http://www.youtube.com/watch?v=vCeAfKCC2ng

9

Physics, Astronomy & Cosmology / Does it matters how close masses are?

« on: 29/01/2010 16:51:10 »

 []
How close does matter has to be together so it can be consider a single mass object?

10

Physics, Astronomy & Cosmology / Is dry air easier to heat up than humid air?

« on: 01/12/2009 23:40:59 »

 []
Thanks in advance for your response.

11

Physics, Astronomy & Cosmology / What is the difference between this two calculations?

« on: 24/06/2009 23:38:16 »

(95+95)/2 and √(95*95)

mod:
when do I have to use each and what is the specific purpose of each one?

12

Physics, Astronomy & Cosmology / What causes the density of water to change in the way that it does?

« on: 23/06/2009 00:40:37 »

Why does the density of water is graph as a parabola function. And why is the peak at 4°C?

13

Just Chat! / Does anyone has Twitter?

« on: 17/06/2009 23:53:22 »

mines is --  [8D]

14

Physics, Astronomy & Cosmology / What is resonance?

« on: 17/06/2009 17:35:40 »

What do you think that mechanical resonance is?  Do you think of a good example to share with us?

Does our body produce any form of mechanical resonance?

Is mechanical resonance used to start radioactivity?

15

Physics, Astronomy & Cosmology / Do waves travel trough plasma?

« on: 08/06/2009 20:36:35 »

I learned that some waves travel trough liquids and solids, then there are others that travel trough solids. Are there any waves that travel trough plasma?

mod:
•Mechanical waves

16

Physics, Astronomy & Cosmology / Are artificial stars theoretically possible?

« on: 31/05/2009 21:49:45 »

https://lasers.llnl.gov/

This artist's rendering shows a NIF target pellet inside a hohlraum capsule with laser beams entering through openings on either end.  The beams compress and heat the target to the necessary conditions for nuclear fusion to occur. Ignition experiments on NIF will be the culmination of more than 30 years of inertial confinement fusion research and development, opening the door to exploration of previously inaccessible physical regimes.

"Credit is given to Lawrence Livermore National Security, LLC, Lawrence Livermore National Laboratory, and the Department of Energy under whose auspices this work was performed."

17

Chemistry / What is wrong with exploding the bubbles in the wrapping.

« on: 22/05/2009 03:40:08 »

does it releases contamination?

18

Physics, Astronomy & Cosmology / How does air resistance vary with the speed of a car?

« on: 16/05/2009 04:37:46 »

Can anybody add a graph to show the proportions.

If it is raining, is the air resistance less than if there was no water?

What about the friction?

19

Physics, Astronomy & Cosmology / How does the Sun keeps its temperature

« on: 29/04/2009 22:03:56 »

 []
is it a nuclear reaction?

20

Just Chat! / Does anybody uses MatLab?

« on: 17/04/2009 05:11:09 »

hello I am improving my math skills, and I'm starting to use MatLab does anybody wants to remotely teach me.  []