End if the year

Looking back over my the year...these last two topics were the hardest for me- but I think now I understand them. What I really need to study is vocabulary because on every single test my worst section is vocabulary. Also, I need to just go back over equations from the beginning of the year that I may have forgotten. An most of all I need to learn order I magnitude. I am really bad at that.

DCP

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Raw Data Tables:

	Current (+/-  0.3 Amperes)
Voltsge (+/- 0.1 Volts)	Trial #	Trial #	Trial #	Trial #	Trial #	Trial #
1	.2	.2	.2	.2	.2	.2
1.25	.25	.25	.25	.25	.25	.25
1.5	.3	.3	.3	.3	.3	.3
2	.4	.4	.4	.4	.4	.4
3.5	.75	.75	.75	.75	.75	.75

	Current (+/-  0.3 Amperes)
Voltsge (+/- 0.1 Volts)	Trial #	Trial #	Trial #	Trial #	Trial #	Average
0.25	.25	.25	.25	.25	.25	.25
0.5	.3	.3	.3	.3	.3	.3
1.0	.35	.35	.35	.35	.35	.35
2.0	.5	.5	.5	.5	.5	.5
3.0	.65	.65	.65	.65	.65	.65
Current Running Through Light bulb ↑

Current Running through Resistor ↑

The measurement uncertainty for the voltage was set at 0.1 Volts due to the difficulties achieving the exact amount of voltage desired using the variable resistor. The measurement uncertainty is set at 0.3 Amperes because the ammeter is marked to the closest 0.5 (Amp .) Therefore the data is rounded to the nearest 0.5 Ampere. 0.5 Amperes divided by two is 0.25 Amperes, then rounded to the closest significant figure the uncertainty is 0.3 Amperes.

  

The line on both graphs fit through all of the error bars, so both graphs are linear functions.The equation for the first graph (through the light bulb) is:

 Current= 0.1433 (Amps/Volts)  x Volts + 0.2166

The min/max lines on the second graph fall around zero, so it can be assumed that the y-intercept is zero. The equation for the line of the second graph (through the resistor) is:

Current= 0.2209 (Amps/Volts) x Volts 

DCP light lab

	Number of light units in a16 cm²  box. (+/-2  light units)
Distance of card from light source (+/- 1 cm)	Trial #1	Trial #2	Trial #3	Trial #4	Trial #5	Trial #6	Average	Statistical Uncertainty (+/- Light units)
5 cm	81	100	81	90	74	70	83	15
10 cm	25	39	36	36	36	36	35	7
15 cm	22	25	23	21	22	22	23	2
20 cm	11	16	14	13	13	15	14	2.5
25 cm	9	12	10	11	12	11	11	1.5

In order to count the light units within the square, the length and width were counted. Due to the light units partially in the square, the length and width were both estimated to the nearest whole unit. Therefore, the measurement uncertainty is 2 light units. The statistical uncertainty was calculated for each trial by finding the difference in the range data points and dividing that values by two.  For example, in the first IV level the following calculations were used: (100-70)/2= 15. There was a 1 cm measurement uncertainty in the distance because the smallest unit marked on the ruler was one centimeter. Additionally, there is human error in marking out the distances and placing the card precisely on the marked distances each time.

Graph: Raw data

Graph: Raw Data
With the line of best fit put onto the graph, it is shown that the data is not linearly related (the line does not fit through the error bars) The Data appears to be an inverse relationship. 

I tried to linearize this function (in many different relationships) and the best fit seemed to be inverse. However, it still did not quite fit. I think I need to reevaluate my uncertainty. 

Never mind, I figured out how to linearize it :)

N

Post topic 2 check in

1. I feel good about free body diagrams and I do not really understand order of magnitude.
2. I feel good about momentum and impulse but I don't really understand power or efficiency.
3. Yes, I think that the little reddish/ orangey book and the remediation on your website are good study tools.
4. I think my diagrams and my procedures are very good. I think that I need to work on the uncertainty in my data tables & better organizing my ia (formatting.)
5. yes, I was not sure how it should look. Now I have a clear example of what I should do.
6. It's helpful to use the blog to get your feed back. However, I'm no sure the reflection posts are really that helpful for learning. (But it also doesn't hurt, so if it helps you then I guess it's a good thing)

Test reflection: Unit 6 & 7

1. Which objectives from the past two units do you feel the most confident about?  Why?

The vocabulary objectives, because I started using the quizzlets to study

2. Which objectives do you still think you may need to learn more about?  How do you plan to do this?

Objective 2, because I always make little mistakes in the problem solving. I should do more practice problems.

3. Have you remediated and reassessed any objectives yet this year?  If so, do you feel like you learned more from remediating?  What do you feel could improve the remediation/reassessment process?

Yes, remediating helps because it forces me to go back and learn the stuff I did not know for the test, rather than just moving on, never actually learning the material,  and having a bad grade. 

4. If you haven't reassessed but you've scored below a 3 on an objective, why did you choose not to?  What would make you more likely to try to meet the standards in the future? 

 

Sometimes it is hard for me to find time to remediate, because I take a morning class (so I cant go before school,) and after school I often have games/ practice, have to pick up my little sister/  neighbors, ect. So i need to plan my generals Periods better. 

 

5. Did you use the Unit Sheet to study?  Was it helpful?

No, I generally use the remediation on your website. 

 

Circular Motion Lab

Raw & Processed Data. 

Radius (m) v. Average Speed  (m/s)

The relationship between age rage speed and radius is quadratic. 

Linearized data:  Radius v. Average speed ^2 & min/max slope lines 

Constant Force Lab Reflection Blog

Constant Force Lab Reflection Blog -

    1. Reflect on your design section.  What do you think you did well?  What do you need to improve next time?

The design section is the section that i think i did really well on and scored well on. I had a good diagram and good descriptions of my procedure. Next time i will try to do everything as well as i did it this time. 

    2. Reflect on your data collection and processing section. What do you think you did well?  What do you need to improve next time?

In the data collection and processing section i did a good job with the graphs and the linearization. However, next time i need to pay more attention to the uncertainty & the significant figures (the precision in my data did not match my uncertainty.) Finding the uncertainty in general still  confuses me. Also, i left the variables off in my equation. 

    3. Reflect on your conclusion and evaluation.  What do you think you did well?  What do you need to improve next time?

My conclusion could use some improving on basically all of it. The biggest thing i need to improve on is the slope, and being able to describe what it means & find the uncertainty in the slope. Before my next report submission i need to learn how to find the uncertainty in the slope, work on how to better describe everything that occurred in the lab.  

    4. Would you like to have a conference with Mrs. W to get more in-depth feedback?

No, I don't think i need that for this one- but i might try and get help on the next conclusion before turning it in.