Description

Manually-operated seismograph model that traces shock waves onto a pulled paper strip

and narrow — at 10 inches tall

the longer focal value yielding milder divergence for subtler virtual-image reduction in optics work

the standard configuration for keeping the field intact between classroom magnetism sessions

Single B22 Lamp Holder Subcategory_Pitchers Manually-operated seismograph model that tracesSingle B22 bayonet lamp holder on a hard plastic base with two 4mm banana terminals, sized to drop a household style bulb into a student built circuit for power and Ohm investigations.

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Single B22 Lamp Holder Subcategory_Pitchers Manually-operated seismograph model that traces

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