I don 't know if earthquake machines exist. I do know my kids started going in circles on the outer part of a round swimming pool. It did not take long before water was spilling out of the pool. After I made them stop, water continued to swirl and spill out. They almost destroyed an above ground 24 foot by 4 foot deep pool.
Slosh. The effect of adding energy in a situation where there is a harmonic period to the motion. This is how we got real high using a swing set. Nothing to do with earthquakes. No harmonic motion.
I don 't know if earthquake machines exist. I do know my kids started going in circles on the outer part of a round swimming pool. It did not take long before water was spilling out of the pool. After I made them stop, water continued to swirl and spill out. They almost destroyed an above ground 24 foot by 4 foot deep pool.
Slosh. The effect of adding energy in a situation where there is a harmonic period to the motion. This is how we got real high using a swing set. Nothing to do with earthquakes. No harmonic motion.