The Lee-Tseung Lead Out Theory

[ltseung888]

The repulsion of the permanent magnet to more than 1200mm gave Dr. Ting much confidence that the double jump was possible.

This and other experiments can be viewed at his site on youtube.com. 

http://www.youtube.com/watch?v=IjVWyv-Nwas

This is the basic test before choosing the type of wire, number of turns, magnitude of current, type of magnet, position of magnet etc.

Some forum members could not even achieve the repulsion between a permanent magnet and the coil.  That was not surprising.  We fell into the same trap in 2005.  Our experimenter at that time used a reel for normal threads as core.  Wound 50 turns or so and gave up.  He said that when connected to an AA battery, the coil does not even produce enough magnetism to affect a compass needle.  He gave up.  (He was not paid and was strictly doing us a favor.  I now learned that the research experimental scientist must be a dedicated believer before he is willing to overcome the many pains and challenges.)

The replicator person has a much easier task.  Every one in our mini-workshop is expected to be able to reproduce the results shown in the video.

[broli]

How much additional height did the double jump achieve ?

[ltseung888]

Nancy: “What can we learn from the first repulsion of magnet experiment?  I can see that the magnet jumps to a great height.  But what is the useful, scientific information?”

Tseung: “If the magnet with mass M1 jumps to a height H1, do you agree that the potential energy gained at the top of the jump is M1 * g * H1 where g is the acceleration due to gravity â€" approximately 9.8 meters per sec per sec?”

Richard: ‘Now you mention it, I vainly remember from my physics that potential energy is something like mgh.  Please continue.”

Tseung: “You probably also remember that when an object falls from a height, the potential energy will be converted to kinetic energy.  Kinetic energy is given by the equation (m*v*v)/2.  In our case, the kinetic energy of the magnet at the bottom should be approximately (M1*V1*V1)/2.”

Nancy: “I understand now.  You can measure the humping height and the mass of the magnet.  From that you can calculate V1.  You can also estimate how much energy must be supplied to the Coil to give the kinetic energy to the magnet.”

Tseung: “We can also measure M2 â€" the mass of the transparent tube, coil etc.  From the conservation of momentum, we can determine the velocity V2.  We can then calculate the theoretical jumping height of the transparent tube + magnet.  When we compare the theoretical height and the actual measured height, we can get the efficiency of our jumping device.”

Richard; “This is really scientific.  The magnet used is only 100 gms or so.  Can you make a 10 kg magnet jump up to 1 meter?  That scenario may get a total load of 12 Kg (tube, coil and battery) jump up 10 cm.  I can see that you, Mr. Tong Po Chi and Dr. Raymond Ting are not experimenting blindly.”

Nancy: ‘I have learned some physics today.  I look forward to learning more.”

[chrisC]

......
  I can see that you, Mr. Tong Po Chi and Dr. Raymond Ting are not experimenting blindly.”

Nancy: ‘I have learned some physics today.  I look forward to learning more.”

How true!

Three blind mice
See how they run ....

In the kingdom of the blind, the one-eyed is King!


cheers
chrisC

[Top Gun]

Dear Dr. Ting and Mr. Tseung,

I think that your choice of using only attraction to do the demonstration is brilliant.  It avoids the complication of two sets of wires.

I believe the purpose of your double-device set up is to demonstrate that jumping in mid-air is possible with the Coil-Attract-Magnet arrangement.

Will the attached diagram be simpler?