Then Professor Mason rubbed this balloon to a silk. Some result, it sticked on the wall. This experiment tells this balloon will produce charge after rubbing, and these charges will make the balloon sticky.
This is the definition of charge for 7 year old.
Then we started Interactions of Scotch Tape Strips experiment. We peeled two tapes off the table and bring them to each other. We found out they pushed each other away. In the second video, still 2 strip of tapes. We put a tape "T" on top of the tape "B". Then we peeled these tapes, we found "T" tapes were against each other and "T" and "B" tape were stick together.
After the Interaction of Scotch Tape Strips experiment, we did an example problem form the lab manual.
This is our prediction graph for F and r.
Then we did a Electrostatic Force lab on the Logger Pro. And this is the graph we got on the Logger Pro.
We believe a positive charge and a negative charge will attract each other.
Then we did a problem by using the equation F=kq1q2/r^2.
There is another problem we did in class by using the equation F=kq1q2/r^2. But this time, we need to found the force on the x-axis and y-axis.
As you see, all these papers are floating on the equipment. Then we put a propeller on top of the equipment, and this propeller started rotating.
In conclusion, we started a new chapter today. We started talking about electric instead of heat. At beginning of the class, Professor Mason did a very interesting experiment, he rubbed a balloon by his hair to make this balloon produce charge so it can stick on the wall. Then we did the interaction of two tapes experiment. If we peel two tapes from the table, they will against each other. Last, the equipment could produce electric so it can make this pie fan spin.
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