The Change in Resistance of a Carbon Paper
The aim of this experiment is to see how the resistance of a carbon-coated piece of paper changes when the different variables change.
A variable is a change in an experiment that could alter the outcome/results of that experiment, and for this experiment the main variables are type of paper, width of paper, length of paper, and temperature.
We are going to be studying how changing the width of the paper affects the resistance, and so to ensure a fair test we will have to keep all of the other variables constant, as if they were also changing the results could be affected and the experiment would not be of any …show more content…
The purpose of the preliminary experiment was to decide on an appropriate length to keep the paper constant at, and an appropriate shunt for the ammeter. The layout and format is the same as the main experiment (see later).
We tested the various ammeter shunts, and decided to use the 10mA shunt, as it gave a reading in the middle of the scale, whereas the other shunts had given readings off or almost off the scale.
We also found that 32.5cm was the optimum length for the paper, as it puts the reading at about 10 on the scale, which is a good as it ensures that as we decrease the width (hence decreasing the amperes), the readomg will not go off the scale as it was high to start with- if we had started with a length that put it at something lower like 3 to start with, it could have gone off the bottom of the scale and we would have to start over.
-Ammeter (and shunt)
The diagram below shows how we will set up the apparatus, in a standard circuit diagram.
The clips are clipped onto both ends of the carbon-coated paper, and so the current can flow through it. The width of the paper will start at 7cm, the length at 32.5cm,
On axis 5 I would give Charlie a GAF score of 22. His life is not functional. He cannot control his emotions when memories and thoughts of his family come up. He seems to be a very dirty individual who doesn’t care about what he looks like. He says that he often sees his family’s faces in other people on the street. His life is dangerous to him as well as those
In Lab 8, the time constant of resistance-capacitance was measured in order to determine the charge of a capacitor. This experiment was conducted by setting building a circuit that connects the voltmeter across the resistor. The voltmeter was then connected across the capacitor. The above procedure was conducted several times using different voltages. Afterwards, the results were calculated and tabulated. The data obtained from the lab were the theoretical Tau for 5V, 4V and 3V. In this experiment, the calculated voltage was also determined. The theoretical and the calculated values were then compared and evaluated by determining their percentage errors. For example, in the 5V, the theoretical value was 1.23V; calculated value was 1.434 with a percentage error of 16.6 %( for voltmeter across capacitor).
The Kendall's coefficient of concordance is an index of interrater reliability of ordinal data, in this case indicating that the reliability is low (Kline, 2005).
It is a summated rating scale comprising of six subscales with scores ranging from 1-4. The lowest level of functioning is represented by 1, while the highest level of functioning is represented by 4. Total scores range from 6-23 each subscale is accorded values of 1-3. A lower Braden Scale Score indicates lower levels of functioning and, therefore, higher risk for pressure ulcer development (Health, 2013).
an 82). Both quizzes seem to be pretty accurate. I find being around a lot of people and being in