1 Secondary emission: An electron, atom or molecule colliding with the surface of the cathode with enough energy can knock electrons out of the surface. 2  Photoelectric emission: Electrons can also be emitted from the electrodes of certain metals when light of frequency greater than the threshold frequency falls on it.
Best Answer: Do it yourself, often referred to by the acronym DIY, is a term used by various communities that focus on people (called do-it-yourselfers or DIYers) creating or repairing things for themselves without the aid of on-duty, work-stationed paid professionals.
Personality and Facts. Addy is a very brave, loving, thoughtful, and kind child, who often risks her safety for the safety of others. She is very close-knit with her family and is devastated that they are separated early in the series; when they get back together, she is still tied closely to them.ddy is also very upset and sometimes ashamed of her poverty status, especially in comparison to Harriet, who has the kind of life Addy expected in freedom.