Question ?

What can you make from 2 different type of metal in electrolyte?

Hum , that's is weird ! i swear its a battery , but no its a cap.

welcome ...

mk1 

i swear it runs on nothing .. but how can it .. its black ...  no wate  its white ...   yikes

its everything and nothing .. its half full its half empty .. 

very quantum ...

ist!   

@ Jadaro2600,

What kind of device is this tube? ...

I'm wondering if it is safe to use such tubes, I'm aware that there may be consequences for using vacuum tubes, as such things are used in produce radiation(?).

Yes, it is a Mercury Vapor Lamp, this is how I received it, thrown away in the dump.
I assume its exhausted the ability to make light, but it sure puts on a display that is very interresting indeed.

Does anyone know what type of UV shielding one can use for the UV radiation, but still be able to observe the striation patterns?

Here is what it actually looks like when it is not turned on.



 

Bill:

V = Q/C
The voltage across a capacitor is directly proportional to the charge on the capacitor and inversely proportional to the size of the capacitor.

i = C dv/dt
The current flowing through a capacitor is the product of the capacitance and the rate of change of the voltage across the capacitor with respect to time. 

In this case the capacitor is acting as a voltage differentiator, where the current is indicating the rate of change of the voltage across the capacitor with respect to time.

E = 1/2 C v-squared.
The energy in a capacitor is one-half the capacitance times the voltage across the capacitor squared.

In electronics voltage is the "though" variable current is the "across" variable.  In a capacitor, the through variable, current, is absorbed by the capacitor resulting in an increased voltage across the capacitor.  This is a process called integration.  If the current changed direction then you integrate i(t) dt where i(t) is negative, resulting in decreased voltage across the capacitor.

This is analogous to a moving mass where the through variable is force and the across variable is velocity.  E = 1/2 M v-squared.  The mass integrates the force resulting in increased velocity.

This is analogous to a spinning merry-go-round where the trough variable is torque and the across variable is angular velocity.  The merry-go-round integrates the torque imparted on it by the ball-peen hammer resulting in increased angular velocity.  This represents stored energy:  E = 1/2 Moment_of_Inertia * Angular_velocity-squared.

v = (t=t0)Integral(t=t1) 1/C i(t) dt
The voltage across a capacitor is inversely proportional to the size of the capacitor times the integral of i as a function of time from t=t1 to t=t2.

In this case the capacitor is acting as a current integrator, where the voltage is indicating the amount of charge (current * time) stored on the capacitor.

Capacitors, moving masses, and merry-go-rounds are power integrators giving you stored energy.  That means that they absorb and store the power that is put into them.  Power is the product of the through variable and the across variable.  Voltage times current, force time velocity, and torque times angular velocity are all forms of power.  You can just "pick your capacitor" and watch as it performs the integration of the incoming power with respect to time and converts it into stored energy.  That can involve integrating voltage times current with respect to time, force times velocity with respect to time, or torque times angular velocity with respect to time.

At zero hertz the impedance of a capacitor is infinity.

At infinity hertz the impedance of a capacitor is zero.

When you connect a battery to a discharged capacitor, the instant the battery connects to the capacitor, the capacitor looks like a short circuit.  After the capacitor charges up, it looks like an open circuit.

When you short out an ideal charged capacitor with an ideal short, you get an infinite amount of current for an infinitesimally short amount of time and the capacitor voltage drops to zero in 1/infinity seconds.

When you charge a capacitor through a resistor, it takes an almost infinite amount of time to fully charge the capacitor.  In theory it takes infinity seconds to fully charge, but the electron represents a discrete quantum of charge so there is a limit.

Please SHUT UP about things you have obviously demonstrated that you know nothing about

What is this, Bill's Cognitive Dissonance Hour?  Mr. 1984 himself?  War is Peace, Freedom is Slavery, Knowledge is Ignorance?  Is your brain hurting?

You are the one that is doing all the demonstrating and it is mind blowing to see you adamantly refuse to try to learn something while on the JT pages you are this soft teddy bear thanking people for explaining to you the differences between batteries in parallel and in series.  Dr. Jekyl and Mr. Hide himself, with his head firmly buried in the sand.

Also, you should never put batteries in parallel.  That's a potential recipe for disaster.

MileHigh

@all

The question is how many times a man without ulterior motive , will repeat him self !?

@MileTroll

"You who make a policy of automatically rejecting 'crazy' ideas without first giving them a fair hearing, you would have joined the experts in 1905 who refused to view the Wright Flyer in action, and whose continuing public ridicule eventually forced the Wrights to abandon the USA and move to France."
- William Beaty

I can sense that the time for MileStupid on this forum is close to stopping.

#$!@%$^&%**x(pi2)/666=MH

Save your soul:

http://www.youtube.com/watch?v=T69TOuqaqXI