@ThePhoton Good question. I made this post because I am currently working on controlling the temperature of a small oven. Different temperatures can be chosen, but all are greater than 100°C. The lowest can be 150°C. And the behavior that those resistors would have, I humbly described it above.

I imagine that, without the flow of hot air, the temperature of the resistance would increase from room temperature until it reaches an equilibrium temperature; this equilibrium would be due to the fact that the Joule effect would come into equilibrium with the losses due to convection.

Uhmmm. No steady-state. What would be the behavior of the electric field when you start connecting the battery to that hypothetical circuit? I must be editing my text. Thanks.

David, it would mean Torricelli's law is valid only at t=0. But undergraduate students solve math problems about tanks draining, using this law, for t greater than 0, when I'm not sure enough about pressure at point "b" be the atmospheric.

I consider you're right, and also, two pistons, two motors, etc. must be synchronized with the same speed (or velocity) in order to add force or torque.

+sofky How do you know I haven't searched this question in another forums? Please reconsider yourself. +sammy gerbil. If you're asking me to provide references, why do you dislike this question a priori?

According to common sense (engineers who are not engine designers are included), 2 pistons fired at the same time would increase torque, and this never happens. There is not an invalid argument.