Easily demonstrate the Doppler effect and fundamental principles of sounds. Tie a string to the buzzer and spin the buzzer over your head. Student will clearly hear the Doppler effect as the buzzer moves toward them and then away from them. Battery and buzzer are secure so there is no worry of the battery disconnecting. An optional second demonstration may be performed with a vacuum pump and bell jar to show students that sounds do not exist in the vacuum of space. Kit includes a reproducible student worksheet and detailed Teacher Notes with teaching tips, instructions, and background information for both demonstrations. Materials Provided: Buzzer, foam block, rubber band, string. A 9-V battery is required and available separately.
Flinn Catalog/Reference Manual Page 714
Flinn Middle School Catalog/Reference Manual Page 465