A clapperboard is used to synchronize sound and picture and to mark the takes and scenes of a particular picture. You can get more information about this at the Wikipedia. Once on the page, type "Clapperboard" into the search field at the top of the page and press enter to bring up the information.
Its used in the compressors of refrigerators and air- conditioners
Crocoite is mainly used as a mineral specimen. It used to be used as a minor ore of chromium, but it is now too rare to be used for that.It is on wikipedia too
dilute ethanoic acid is used as a preservative in the preparation of pickles.it is used for making cellulose acetate which is an important artificial fibre.it is used in the manufacture of acetone and esters used in perfumes.it is used in the preparation of dyes.it is used to coaggulate rubber from latex.it is used for making white lead which is used as a white paint.it is used as a chemical reagent in chemistry lab.
evaporating is used in preparation of petrol, etc.
in what used lincomycin that is for what ?
Clapperboard ,
A Clapperboard .
The duration of Clapperboard - TV series - is 1500.0 seconds.
Clapperboard - TV series - was created on 1972-04-14.
Clapperboard - TV series - ended on 1982-01-01.
You might be talking about a clapperboard? http://en.wikipedia.org/wiki/Clapperboard
A clapperboard.
A clapperboard.
Clapperboard
A clapperboard is used to synchronize audio and visual recordings made separately. It produces a distinctive precise action on both recordings that may be lined up later when editing to combine the two recordings in synchronization for playback. So likely it should be used at the beginning of any point that might need editing together at a later time. Such as the start of a particular scene of a movie.
a megaphone ?
It's called a clapboard, or a clap slate, or a clapperboard. According to Wikipedia (see the Related Link below), "Other names for the clapperboard include clapper, slate, slate board, sync slate, time slate, sticks, board, and marker."