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Demonstration Buzzer

Quantity
Demonstration Buzzer AP6856
Catalog Number
AP6856
Price/Each
$21.50
 
Demonstration Buzzer
 
Product Description


This economical buzzer has several uses in a physical science classroom. One use is to demonstrate fundamental principles of sound. Tie a string to the buzzer. Spin the buzzer over your head and students will clearly hear the Doppler effect as the buzzer's pitch changes. Battery and buzzer are secure so there is no worry of the battery disconnecting. For another demonstration, place the operating buzzer on a foam pad inside a bell jar. Evacuate the air from inside the bell jar with vacuum pump and the sound disappears! Effectively show students that sounds do not exist in the vacuum of space. Foam pad prevents any buzzer vibrations from generating extraneous sound through the vacuum plate. Complete instructions for the two mentioned demonstrations are provided. Buzzer requires a 9-V battery, but is not included. Optional accessories for certain demonstrations include a bell jar, vacuum plate, vacuum pump and vacuum tubing; each sold separately.
Specifications


Resources
Accessories
Batteries, Transistor, Alkaline, 9.0 V
AP1430


The AAA, AA, C, D, and 9 V batteries shown are all alkaline batteries. Consumer Reports states that while alkaline batteries cost three to five times more than acidic batteries, alkalines last 10 times longer.
 
Small Bell Jar with Molded Knob, Glass, 3.5-L
AP6655
High quality, flint glass bell jars. Glass is crystal clear, allowing students to easily view experiments performed inside the jar. Bell jars with ground glass stopper offer the flexibility for evacuation or for pressurizing the inside of the jar using...
 
Vacuum Plate, Economy Choice
AP6683
This durable polyethylene vacuum plate with rubber gasket is an excellent choice when budgets are tight! Use this plate with the small glass bell jars (AP6655 and AP6656). Accepts 1/4" i.d. tubing. Plate dimensions: 24 cm x 24 cm.
 
Tubing, Vacuum, 10 Ft.
AP8789
Extra thick-walled black rubber tubing is great for all your vacuum applications. This machine-made tubing is guaranteed not to collapse under normal conditions. Supplied in 10-foot lengths. Inside diameter is 1/4" and the wall thickness is 3/16"....
 
Pump, Vacuum, Two-Stage
AP1597
The most durable two-stage pump you can buy. This quiet, dependable vacuum pump will produce a high-quality vacuum when performing experiments where a very low pressure is needed—boiling water at room temperature, etc. The rotary sliding vane produces...
 
Additional Resources
Test
 
Flinn Catalog/Reference Manual Page 661
Flinn Middle School Catalog/Reference Manual Page 439
 
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