My understanding of the model is that a pendulum will swing back and forth in a vertical plane in an inertial frame of reference. If the floor it is sitting on rotates then we will see an apparent rotation of the plane. The apparent effect is caused by having 2 references frames, one inertial, one rotating. In other words the coreolis effect.
I am happy to accept that a model sphere would show variations in the period of rotation dependent on the latitude ie full rotation at a pole and none at the equator.
Do I need to propose an alternative reason for an apparent rotation of the plane in the context of a foucault pendulum? What is the
natural phenomenon observed? The effect takes place only in the context of an 'experiment' designed to prove its presupposed outcome of earth rotation, see the problem here?
https://study.com/academy/lesson/sci...ples-quiz.html
The dependent variable is the main focus of the experiment; it is what's being examined in the experiment. What's changed in the experiment is the independent variable. It's changed in the experimental group only - this is sometimes called manipulation of the independent variable. The control group does not have any changes in the independent variable.
At the end of the experiment, the scientist examines the difference between the two groups to see if there was any effect on the dependent variable. If there is a difference, it is reported as a cause-and-effect relationship. In other words, when the independent variable is manipulated, there is an effect produced.
Ie science explains cause and effect relationships. Whatever the foucault pendulum is, it is NOT a scientific experiment!
You say we can manipulate earth spin by setting up pendulums on other planets? We are talking science not sci-fi and toy models.
Back to reality - you can't apply the scientific method to prove or disprove earth rotation, you can speculate, you can set up models but this is not science, it is pseudo-science, using the label of science and appearing to speak in the language of science but disregarding the principles on which it stands.