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.
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.
In much the same way as sound is used in music, food is used in cooking, and soil is used in agriculture.
Light microscope cannot be used. An electron microscope houl b used
volcanoes are used for nothing
it is used in motar and in cement
A Clapperboard .
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
Dr Hayden J. Jamer an Australian Student. There is not much information on the young scholar but he is working on many vast inventions.
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 ?