400

Found 2 Results for 400.

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1. Cockroaches
Given enough food, roaches are remarkably prolific beasts — a single female German roach can multiply into an epidemic of more than 400 000 scuttling scavengers in less than a year.
http://www.fun-home-projects.com/home_ownership/​accessories_and_maintenance/​cockroaches.html

2. Variable-Frequency AC Power Supply
This device can produce the 50 Hz output at 115-120V for which most European appliances are designed, as well as provide the 400 Hz output necessary for many power tools.
http://www.fun-home-projects.com/electrical_projects/​tools/​variable_frequency_ac_power_supply.html

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