Taking the hydrostatic paradox to the next (water) level
How well do people understand hydrostatics? I am preparing a workshop for tomorrow night and I am getting very bored by the questions that I have been using to introduce…
Tag: pressure
Pressure distribution on a wing
Another neat experiment in the collection I’ve recently been talking about is measuring pressure at different points on a wing profile. It’s not terribly surprising that – as long as…
Playing with Venturi tubes II
On Monday I posted about playing with Venturi tubes. Guess what: We are going to play more today! Because today the Venturi tubes are connected to a “proper” manometer: Now,…
Playing with Venturi tubes
A Venturi tube is one of the things one hears about in hydrodynamics class all the time, but one never gets to see them for real. And even though I…
Letter tubes and hydrostatic pressure
How less than 25% of the tested students give consistent answers to these problems. This is already the third blog post talking about the paper “Identifying and addressing student difficulties…
Barometer problem.
Still talking about hydrostatic pressure. Yes, I am not done with hydrostatic pressure yet! One of the problems students were given in the study “Identifying and addressing student difficulties with…
Hydrostatic pressure
What are students not understanding about hydrostatic pressure? Tomorrow (today by the time this post will go online, I guess) I will present the paper “Identifying and addressing student difficulties…
Cartesian divers – theoretical considerations
A bit more reflection on cartesian divers. When I wrote the two previous posts, I had known cartesian divers for a very long time in many contexts, for example as…
Cartesian diver – organic version
Using orange peel as cartesian divers. Guess what my mom told me when we were playing with cartesian divers the other day? That orange peel works really well as a…
Cartesian diver
Compressibility of water and air. Today I want to talk about the different compressibilities of water and air. Actually, no, I just want to show you an experiment. One way…