Stan Lee Media canât claim ownership to any of the iconic comicbook characters Stan Lee created for Marvel, a federal court judge ruled Thursday, giving full control of superheroes like Spider-Man, The Avengers, Iron Man, the Hulk, the Fantastic Four and the X-Men to the Walt Disney Co.
However they have now been eclipsed by a team from Chinaâs Zhejiang University that has created Graphene Aerogel â a sponge-like solid material made from freeze-dried carbon and graphene oxide that weighs just .16 milligrams per cubic centimeter.Thatâs just twice the density of hydrogen.owever they have now been eclipsed by a team from Chinaâs Zhejiang University that has created Graphene Aerogel â a sponge-like solid material made from freeze-dried carbon and graphene oxide that weighs just .16 milligrams per cubic centimeter.
Medical x-ray machines in hospitals use the same principle as the Crookes Tube to produce x-rays. The most common x-ray machines use tungsten as there cathode, and have very precise electronics so the amount and energy of the x-ray produced is optimum for making images of bones and tissues in the body.Here is a good page that shows how x-rays are formed. 1  Go on to page 7. 2  Go back to page 5.3  Return to the table of contents. 4  Return to the Radiation Information Network's HomePage.ere is a good page that shows how x-rays are formed. 1  Go on to page 7. 2  Go back to page 5. 3  Return to the table of contents. 4  Return to the Radiation Information Network's HomePage.