Electric Charges(Update)

 

This is the begining of a new section of the book. It is no more about thermal expanssion. It is all about positive and negative charge electrons and how they react to each other directily and indirectly. So lets change our focus to back to 2A becaue a lot of the elements that has to do with electrons resembles simple free body diagrams and sum of forces for now.

 

 

In thi picture we see what happens to a balloon  that was rummbed with mystery fur. The fur most likly came from a road kill rabbit or something in the rabbit family. However, that is not the point of the picture. Here we see that the balloon sticks to the surface of the glass just because the balloon was rubbed with the rabbit fur.

 

Here is the free body diagram of the forces acting on the balloon when it is stuck to the wall and not falling. The new force that we have not seen in previous physics classes is the Force of electron magnetisim.

 

Here we are doing a little lab. We stucked two long pieces of tape on the table and quickly pulled them off. Then we slowling place the to non-sticky sides to each other and saw that they were moving away from each other as we tried to get the two pieces closer.

 

Here we are doing a simple force problem with a charge attacted to a string while another one is getting closer and closer. We obtain data through Logger Pro ( as seen below).

 

We needed to create new calculated columes to be able to graph the proper graph. We need to measure the inital distance of the two charges and the final hight that the charge on the string ended up.

 

This is the equations that we used to cacluate the charges of an two electrons. It was based out of what the area and the radius of each  electron.

 

This picture shows the three ways that electrons act wiith each other. And that is it for this picture. It is just for reference/ memorization of what the charges sign should be and conceptual what shoudl happen so you can see if your answer is right.

 

Here we caclualted that force of a electron onto another electron. F=Kq1q2/r^2.

The most simple electron force equation that we will use in this class.

 

here we see the same problem but now with angles and we needed to find the magnetude of the force in the particular direction. It is the basic x^2=y^2=z^2

 

Here we see a wig on a qutomated fur rubber. That is not the offical name of the contraption but it will have to do for now. This creates electric charges that causes the hair to stand on end.

 

here is the picture of the guts of the contraption. We had to describe how it was created the charge. This year we did the samething but with actual hear. It had a similar effect.

Here we see that the force of an electric charge is 42 times stronger then the force of gravity. Which means if two electrons the size of the earth was made it will be stronger then the sun. I think anyway.