The NPN transistor makes a boost converter in a variation on the classic ‘joule thief‘ circuit, and the PNP one with works with the zener diode to regulate the output by depriving the switching transistor of bias if the output voltage rises too high. The converter wasn’t too hard to re...
How do you clean a nickel without damaging it? Gently rinse the coin with distilled water. Pour distilled water over the surface of both sides of the coin. Or, set the coins in a shallow bowl of distilled water, and let them sit for a few minutes. Note: It's crucial not to use ta...
Due to the sheer age of most Viking vessels, there are a limited number of intact ships. Since they were made of wood and held in place by metallic rivets, it was eaten into and corroded over time. Image Credit – Wikimedia CC – 2.0 / Larry Lamsa The intact vessels that are availabl...
Cause to deteriorate due to the action of water, air, or an acid; The acid corroded the metal The steady dripping of water rusted the metal stopper in the sink Rust Become coated with oxide Rust Of the color of rust Common Curiosities Are patina and rust preventable? Patina formation can ...
The surface of the copper piece is corroded with copper (II) oxide (CuO) while the surface of the iron piece is shiny with He. What will happen What does copper II sulfate do to the enzyme activity? How do you explain this change? What experiment ...
Then one day, while unpacking, I came across a box filled with things I had owned years before in the Village. Inside was a brown paper bag. I opened it, and there were two corroded sardine cans, a nickel, a dime and three pennies. Suddenly the past came flooding in like a riptide...
they fall behind. As more consumers are getting caught up in it, subprime starts to blow out, even in what are considered the good times because actual prices have outrun these people’s incomes, and they’re confronted with it, such as with rent or healthcare, from one day to the ...