Yes. How else? If it touched Anything other that is matter, it would annihilate.
Both time and temperature can decrease the vacuum draw of an evacuated tube. Hence the provided expiration dates and storage temperature of tubes. The vacuum of a tube will decrease if it is too old or if stored at a colder temperature than recommended.
the vacuum tube
A vacuum tube is simply a tube with no oxygen nor carbon dioxide in it (aka no air).
Millman's theorem
who made the vacuum tubes
A magnet slows down when moving through a copper tube because the magnetic field generated by the moving magnet induces electric currents in the copper tube, creating an opposing magnetic field that resists the motion of the magnet. This resistance, known as electromagnetic induction, causes the magnet to slow down as it moves through the tube.
Kilobytes and vacuum tubes are not in the same category. At best, a twin triode vacuum tube is a single flip-flop and can hold 1 bit of information, making a vacuum tube about 0.000122 of a kilobyte.
an electron tube containing a near-vacuum that allows the free passage of electric current.
Yes, the sperm is stored in the tube of the urethra.
If the tube is a conductor, the first way involving magnetism that will slow the magnet down is competely natural. When the magnet passes through a conductor, the changing magnetic field will induce a current in the conducting tube opposing the velocity of the magnet. This will cause the magnet to slow down through the length of the tube. The classic demonstration of this involves a copper tube and a small, round magnet. The second way involving magnetism is to wrap the tube in a coil of wire, creating a solenoid. After you have wrapped the tube, if you put a current that is counter-clockwise through the solenoid, the magnet will slow down because the solenoid creates a magnetic field that is directed upward. With this method, you could change the direction of the current and the magnet will fall faster instead.
cellphone
* == 1st generation vacuum tube look like as a parallel electric bulb. _____ ----_____)