ImJimHill's channel
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What is sound? 388
Uploaded videos
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SignMaking
ImJimHill
12 views
Making a big sign which can be held up by helium balloons. It will take several balloons, but not a blimp... This must be held down so it won't fly away; that would be ille...
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Sound: Is it just moving air?
ImJimHill
38 views
A gedankenexperiment to determine if sound is really just propagated by air moving along with it.
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Taking a science class
ImJimHill
39 views
Silly clip for first practice using Xtranormal
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Build a Foil Electroscope
ImJimHill
785 views
A science building project: The foil electroscope was invented hundreds of years ago as a serious tool for study of electric charges. We use commercial versions of these in...
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Physics: Inverse Square Laws; Why?
ImJimHill
147 views
A short demo describing how and why we have so many "inverse square laws" in physics and a bit about what that means. It might be used for levels varying from advanced midd...
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Just a minute
ImJimHill
25 views
Another artistic/environmental tidbit. I was fascinated by how hard it is to figure out the scale if concentrating on the waves with nothing else in view. (Of course it is ...
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Crushing metal with ice
ImJimHill
73 views
UNedited (very standard) classroom demo:
A metal can is heated while open to air, then sealed and cooled.
I plan to replace this after adding title, subtitles, etc.
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What is sound?
ImJimHill
388 views
Completely UNedited classroom demo using equipment from my university's department. (The audio is from the camera built-in mic, and someone bumped the camera alignment slig...
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Summertime in the Park
ImJimHill
36 views
My artistic side.
OK, this is partly just to be funny.
Really, I had been marveling about having a good video camera (this is only WVGA, but it can do 1080p) that f...
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Energy Conversion: A Crank Flashlight
ImJimHill
408 views
Made for a specific class, this is a script (and some silliness) over a set of photos of a crank-powered flashlight that has been opened up to see what's inside. Probably r...
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