KIDS QUIZ
FAMOUS INVENTORS AND INVENTIONS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
small. specialized machines
|
|
|
a machine that plays recorded music or sound
|
|
|
a complete failure
|
|
|
legal documents
|
Detailed explanation-1: -phonograph, also called record player, instrument for reproducing sounds by means of the vibration of a stylus, or needle, following a groove on a rotating disc. A phonograph disc, or record, stores a replica of sound waves as a series of undulations in a sinuous groove inscribed on its rotating surface by the stylus.
Detailed explanation-2: -How does a phonograph work? Sound is collected by a horn that is attached to a diaphragm. The sound causes vibrations in the air that travel down the horn causing the diaphragm to vibrate. The diaphragm is connected to a stylus and pressed into a cylinder covered in wax (or alternatively a thin layer of tin foil).
Detailed explanation-3: -pho·no·graph ˈfō-nə-ˌgraf. : an instrument for reproducing sounds by means of the vibration of a stylus or needle following a spiral groove on a revolving disc or cylinder.