Find the condition for equilibrium

Find the satble and instable equilibrium

The plan was to continue doing problems in series circuits, figuring out voltage, amperage, or resistance depending on which two variables had their values supplied. I was instructed that Kate would not be doing physics today. There was no assignment.

I was charged by Kate's mother to help Kate to finish up her work from her previous school. I explained Ohm's Law to Kate and began to show her how to do problems based on what was being asked. I showed her how to solve problems asking for current, voltage, or resistance. There was no assignment.

We experimented with more complicated designs, picking up where we left off last time. We tested them from various points on the property. We were able to determine the wind direction based on how the planes were flying, and increase our flight times by 20%.

We began the lesson with Richard's suggestion to continue our experimentation on the helium balloon. He wanted to test whether his empty 2-liter seltzer bottle would, if tied to the balloon, sink it. I made a chart on the whiteboard where we could keep track of A. Each object we tested, B.Richard's hypothesis, and C. The result when tested. We tested various objects and Richard had a 75% success-rate. When we ran out of objects to test, we moved on to the study of how to craft a paper plane. First we just freestyled it, each made one, and then went to the playground to the top of the play structure and launched them. Richard noticed his was too heavy and too "flat". So, we discussed how trial-and-error is part of the prototyping process, and we went back to the drawing board. His second attempt was much better, but he still wanted to try for even better. So, we watched some short videos of experts, and we followed along with them. The folds are a bit complicated, but Richard understood mostly how they were folding and re-folding the paper (good spatial relations). His only struggle was the fine motor, but for his age definitely normal to need help with the tricky creasing. We were in the process when class ended, so I saved them and we can finish next time.

Complete the nuclear fusion reaction equations, review hydrogen isotopes in order to better explain the fusion reaction. View nuclear fusion demonstrations in animation, showing the formation of helium and the release of energy. View and discuss the large hadron particle accelerator at CERN, with a demonstration of how it works.

Define and discuss thermonuclear fusion, the nuclear reactions involved, the difference in mass, and the energy released. View and balance the 4 equations needed to show the sun's fusion reaction.

Define and discuss nuclear fusion. Review isotopes of hydrogen and view and discuss fusion of deuterium and tridium into a helium nucleus and a neutron, along with the release of energy. Explain that high temperature and/or pressure is needed for the collision to occur. Discuss thermonuclear fusion in the sun and compare it to combustion. Write the 4 equations which show the fusion of hydrogen into helium.

Discussion of binding energy curve, showing the stability of atoms increasing up to iron. A discussion of nuclear fusion as a combination of lighter nuclei to form heavier nuclei, up to iron.
Viewing how a high speed collider can accomplish the fusion of protons, with a release of energy.