Why do you think you can float, check this image and watch these two videos to understand this simple principle.
Some of the Archimedes inventions
This is the video we did in our class. The idea is that you check the amount of water (VOLUME) displaced when we introduce the glass with rocks. Depending on the weight of this glass if the volume is the same than upthurst the glass will float.
The second time when I introduce more rocks the volume and the weight of the glass is practically the same, it’s close to sink.
We have started our new lesson doing an original project creating a compass and doing a demonstration through magnetism. After few chances it worked really well and we could see our needle pointing the North Pole.
Congratulations Carlos for your experiments.