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10 Security Devices to Help Keep Your Family Safe

electronics.howstuffworks.com/family-tech/tech-for-parents/10-security-devices-keep-family-safe.htm

In the market for family security devices like a alarm systems or hidden cameras? Check out 10 security devices to help keep your family safe.

How Gears Work

science.howstuffworks.com/transport/engines-equipment/gear.htm

If a device has a motor, engine or spring, it probably has gears! But what do gears do, exactly, and how do they do it?

How Digital Scales Work

electronics.howstuffworks.com/gadgets/fitness/digital-scale.htm

Digital scales are common measuring devices that harness several physical laws. Learn how digital scales weigh everything from peanuts to penguins.

Inside a Combination Lock

home.howstuffworks.com/home-improvement/household-safety/inside-lock.htm

A combination lock is a fairly simple device that provides a high level of security. Take a look at the inside of a combination lock.

How to Prepare for a Flood

science.howstuffworks.com/nature/natural-disasters/how-to-prepare-for-flood.htm

NOAA is expecting widespread flooding throughout the United States this spring. Are you ready?

How Metronomes Work

electronics.howstuffworks.com/gadgets/audio-music/metronome.htm

Metronomes are devices that provide a steady beat for practicing or playing music. Learn about the types of metronomes and how metronomes work.

How does a hydraulic ram pump work?

science.howstuffworks.com/transport/engines-equipment/question318.htm

When I was a kid, my Aunt had constantly flowing water from a natural spring down the hill. She said the water was pumped uphill using a hydraulic ram. This device ran constantly and didn't need any electricity! What is a hydraulic ram and how does it work?

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