I taught my kid to ride last month and told her the wheels act like gyroscopes, because that is what I was told. Then I read that this is mostly wrong and now I do not know what to tell her. If it is not gyroscopic,…
I filled two identical silicone trays, one straight from the cold tap at about 20C and one from the kettle after it had cooled to maybe 70C, and put them on the same freezer shelf about 20cm apart. After 40 minutes the…
My niece asked how planes stay up and I have about ten minutes and a kitchen table. Every explanation I find either says air goes faster over the top so pressure drops, or says the wing throws air downward. I do not…
I walk the same route at the same time and I have a little thermometer on my bag. At 2C last Tuesday my breath came out in big clouds, and at 1C on Thursday there was basically nothing. Same jacket, same pace, same me.…
I made a syrup with about three cups of sugar to one cup of water, boiled until clear, and hung a seeded skewer in a jar on the counter. Two weeks later there is maybe a centimetre of growth on the stick and a fuzzy…