Going through the news flow of LinkedIN, I saw a home experiment for kids. The mother used a simple experiment to show her kids what a suction bucket was. She had an aquarium with sand covered by water. She inserted a coke can with the top cut off. Then she inserted a straw into the bottom of the can and sucked out the air trapped inside the can.
Visually, I could see the can descend deeper into the sand. When she tried to pull the can out of the sand, it was very difficult. As I watched, I thought, “This is all very interesting. But what’s it for?” I thought I understood the basic concept. But, not knowing anything about suction buckets, I couldn’t see what the application would be.
I put a comment (always a scary thing to do) saying that while I thought the experiment was very interesting I had no idea what it was for. “What’s the point?” I was asking. I had this vague feeling that after all there must be a point. Just educating the kids about sand and coke cans or how to be careful not to inhale water when removing air through a straw didn’t seem sufficiently significant for all the effort involved. After all, she had posted a video! Read more →