First, we did a very interesting experiment. We have 2 batteries, 2 bulbs and 3 wires. We need to found a way can make the bulbs get brighter and dimmer.
These are the graph we drew about how we did to make bulbs brighter and dimmer. We put the 2 bulbs parallel if we want brighter. We put the 2 batteries parallel if we want dimmer.
Professor used ohmmeter to found the resistors of the heater.
These are the three things we need to know in order to find delta T.
These are the temperature vs. time graph by using Logger Pro. First graph is regular and second one is twice volt than first graph. We can see that the increase of temperature is by factor of 4.
We found out the equation for temperature. If we make to 2V, the change of temperature should be 2 times. But actually is more than 2 times.
We found the resistor did not change, so when the V=2V and I=2I, the change of temperature should be 4.
we found the resistant on human body by using I=V/R.
In this picture, we found the paths did not affect the work, but direction of gravity will.
There are three arrows, we need to find the work on each arrow. And we found Wa>Wc>Wb.
This is a particle and its electric field.
We found the change of voltage is kQ/r.
We started to do a vpython lab. Then we drew the graph and find the V of different particles.
There are the different between plagarism and collaboration.
Conclusion:
At the beginning of the class, we did a interesting experiment and we found the bulbs will brighter if we put bulbs parallel and the bulbs will dimmer if we put batteries parallel. Then we did another experiment by using Logger Pro, and we found the factor of the temperature change is 4 if we double V.Last, we did a program by using Vpython and talked about our Vpython homework.
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