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Physic

A blog by esmith in General

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About this blog

If this blog were a graph it's be jerk vs time graph

Entries in this blog

Automatic Doors

One of mankind's greatest inventions is the automatic door. The idea that one once had to actually push or pull open the door to a department store now seems barbaric. But how do these marvels of modern engineering work? How does the omnipotent sliding door know that we, the humble customers, are there and require entrance to the establishment. Most automatic doors operate using a motion sensor. Motion sensors work by sending out microwaves and detecting motion using the same principle that astr
esmith

esmith

1

And Automobiles

If you've ever driven late at night with an irresponsible teenage driver, you've most likely involuntarily been a part of some pretty crazy car stunts. The good old fashioned Tokyo drift and doughnut are classic examples of things that should not be done with a car. But like most things that are bad for you, they are pretty cool. A stunt that doesn't get a lot of love is the wheelie. It's one thing to pop one on a bike or a Razor scooter, but to do it with a four-wheeled car is on a whole other
esmith

esmith

1

A Few Thoughts...

Last weekend I attended the high school's production of All Shook Up. It was a nice show but a few things stood out to me. The first was that the string of lights they used in the abandoned fairgrounds scene was wired in parallel. Some of the lights were out, but the rest still shone on, because there was still a path for current to get from one bulb to the other, whereas in a series configuration, a dead bulb would block all current flow and cause the all of the remaining bulbs to go dark. Prop
esmith

esmith

0

A Brief Addendum

It is with great shame that I issue the following public apology. In a previous post, since deleted for the safety and well-being of this community's physics students, I committed crimes against humanity, and even worse, crimes against physics. I claimed that if one were to stick a knife into an outlet, they would not be electrocuted because the circuit could not be completed. This would be true in a vacuum, but I failed to take into account the fact that in being connected to the ground, one wo
esmith

esmith

0

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