Surface Area, Resistance and Mass Experiment

Surface area, resistance and quality testing equipment * 6 Cupcake rack * Gauge rod * Stopwatch * Blue paste method ====== We started weighing the cupcake rack, which means that we are 84 meters away from the ground That is to say. Then we record the time it took to drop. Then tighten it down and drop it from the same distance to see if the surface area will affect time. After the first experiment, we added 0.2 g of blue tack to each of the other 5 cup cake racks, and repeated the process of not tightening and tightening repeatedly and started examining the quality.

The main purpose of this experiment was to determine the effect on permeation rate by changing the surface area. Changes in quality and surface area of ​​chopped potatoes were seen. Initially these potatoes had different surface areas, but the quality is the same. The penetration rate increases with increasing surface area. The increase in permeation rate is proportional to the surface area. Rate is now given by change over time. Invasion is the movement of water molecules from high concentration to low concentration; of course, semipermeable membranes are necessary to maintain concentration differences. Therefore, the water molecules move through the semi-permeable membrane along "concentration gradient (from high concentration to low concentration)". The penetration rate is "concentration change (mol) / hour (second)".

The purpose of this experiment is to measure how the resistance varies as the factor changes. In this experiment, you can select various variables such as ambient temperature, length, thickness, material, wire temperature, surface area, magnetic properties, coating quality, purity. However, in this experiment, we measured only two of the length and the thickness. Two are the easiest to measure and to show the effect on resistance. Prediction: The result should show that resistance increases with length or thickness. This occurs because the current decreases as the length or thickness increases. Since the voltage does not change, resistance decreases as the current decreases. METHOD: In the experiment, you need to use the following equipment.