Backyard Ballistics by William Gurstelle

By William Gurstelle

This bestselling DIY guide now gains new and extended tasks, allowing usual fogeys to build sixteen remarkable ballistic units of their storage or basement workshops utilizing reasonably cheap loved ones or ironmongery store fabrics and this step by step consultant. transparent directions, diagrams, and images convey easy methods to construct initiatives starting from the easy match-powered rocket to the extra complicated tabletop catapult and the offbeat Cincinnati fireplace kite. The vintage potato cannon has a brand new evil twin—the piezo-electric spud gun and the electromagnetic pipe gun has joined the corporate of such favorites because the tennis ball mortar. With a robust emphasis on safeguard, the booklet additionally offers tips about troubleshooting, explains the physics at the back of the tasks, and profiles scientists and awesome experimenters resembling Alfred Nobel, Robert Goddard, and Isaac Newton. This e-book may be crucial for the legions of yard toy-rocket launchers and fireworks fans who want on a daily basis used to be the fourth of July.

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Extra resources for Backyard Ballistics

Example text

If the switch is open, current will not flow at all through this open circuit. The battery is supplying electrical energy and the light bulb is using electrical energy (actually, it’s converting electrical energy into heat energy). There’s a give-and-take relationship between the two: Voltage is the push the battery gives to get current moving, and energy from that push is absorbed when current moves through the light bulb. As current flows through the bulb, voltage drops across the bulb. Think of it as if the bulb is using up energy supplied by the force (voltage) that pushes the current through it.

There is a potential problem you may run into with series circuits: If one component fails, it creates an open circuit, stopping the flow of current to every component in the circuit. So, if your expensive new restaurant sign sports 200 light bulbs wired together in series to say “BEST FOOD IN TOWN,” and a home-run ball knocks out one bulb, every one of the light bulbs goes dark. Parallel connections There’s a way to fix the problem of all components in a series circuit blacking out when one component fails.

13 14 Part I: Understanding the Fundamentals of Electronics Experiencing electricity You can personally experience the flow of electrons by shuffling your feet across a carpet on a dry day and touching a doorknob; that zap you feel (and the spark you may see) is the result of electrically charged particles jumping from your fingertip to the doorknob, a form of electricity known as static electricity. Static electricity is an accumulation of electrically charged particles that remain static (unmoving) until drawn to a bunch of oppositely charged particles.

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