Lab Report Discussion

Therefore, a theoretical uncertainty value that accommodates both uncertainties of the measurement and the equipment is calculated. The theoretical uncertainty calculation is primarily based on the propagation of error formula. The theoretical uncertainty calculation is as follows.

2. No, the forces went in equal and opposite directions just as the rubber band and string

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

Paragraph 1 - How the Law of Conservation of Matter is supported by the experimental demonstrations: In the law of conservation particles and materials are neither created nor destroyed . It was similar towards the experimental demonstrations because nothing changed or destroyed in the processes .Kinetic and potential energy was used in the experiments.

To begin the experiment, we measured the masses of the two stoppers and the eye bolt used to secure the stoppers that we were using in our apparatus. The mass of the first stopper was 18.8 grams and the mass of the second stopper was 50.5 grams. The mass of the eye bolt was 11.6 grams. The mass of the screw and bolt that secured our hanging mass was given to us as 25 grams. After, we chose six different hanging masses based on stopper mass. We made sure that the hanging mass was always larger than the stopper mass or else we would not be able to get the stopper to spin at a constant velocity. The first three mass ratios we chose was using the stopper with the mass of 18.8 grams and then we used a hanging mass (the mass of the screw and bolt is included) of 65 grams, 85 grams, and 105 grams. This gave the three mass

of the meter resulted to 11.98 rev. of the standard. g). Indicate the percent error of the above test. h).

The mass of three clamps with hangers was determined, and the average mass of a clamps and hanger was determined. A 100 g mass was then hung on the 10 cm mark of the meter stick using a hanger, and then a 50 g mass was hung on the other end to a point where the meter stick was once again balanced. The values of the distances and the lever arm lengths were determined and recorded while performing the experiment. My group and I tested differing weights and lengths along the meter stick in order to practice calculating the torque of the system. To calculate the torque, we used the Ʃ풯 principle and the torque diagram to compose a 풯net equation. Furthermore, after the formation of the torque net equation, we substituted F_┴r for all the 풯 in the equation and solved for the position of the second hanging mass. Furthermore, theoretical was just an approximation of were the balancing point for the different weights would be positioned along the ruler in a perfect world. Due to the contributing errors in the experimental set up, our theoretical was never equal to the experimental. Therefore, my group and I used the percentage of error equation to check if our theoretical values were relative to the experimental values. Therefore, we found the difference between our r values, and then compared that value to our theoretical data. This comparison

The accuracy of this experiment cannot be commented on as there is no ‘true value’ to compare the gathered results with however, if more results were to be collected the accuracy would increase. The precision of the experiment can be interpreted through the range of the values (min and max), as shown in the fig 4 the gap between the minimum and maximum is large which leads to believe that the data was low in precision. The validity of the experiment was moderate as the investigation carried out measured what it was supposed to measure however, not with the amount of accuracy that was

The different measurement had siginificant differences between them. I think the the changing frequency method gave better results because the graph was more consistent.

Purpose: The purpose of the practical is to find how mass affects acceleration and how it affects also the force of the accelerating body. To do this we are going to do the ticker tape experiment where an accelerating body pulls a tape through a consistent 50 dot per second ticker timer. The acceleration body in this experiment will be a small trolley pulled by a string that is pulled by the downfall of different masses which will then tell how mass affects acceleration.

Place the ring stand in an area that allows up to a 150cm length of string for the pendulum to move without any obstructions.

* The relevance of this experiment is similar to understanding a real airplane. Paper airplane models are derived from an actual plane these days. The design of an airplane has so much to do with distance, hang time, speed, and many other factors. Understanding the models I have chosen to make help me

Purpose: The purpose of the practical is to find how mass affects acceleration and how it affects also the force of the accelerating body. To do this we are going to do the ticker tape experiment where an accelerating body pulls a tape through a consistent 50 dot per second ticker timer. The acceleration body in this experiment will be a small trolley pulled by a string that is pulled by the downfall of different masses which will then tell how mass affects acceleration.

As a result of trail and error method we find the angle for the third pulley and the mass that should had be suspended from it. This will balance the forces deployed on the strings due to the other two masses. While the third force is defined as the equilibrant (������⃗������) Since it is the force that establishes the equilibrium. It is also the negative of the resultant -������⃗������ = ������⃗������ = ������⃗ ������ + ������⃗������. We gathered and recorded the mass and the angle required for the third pulley to enable to put the system into the equilibrium in table 1.

Table 1 & 2: First, find the mass of the wooden block and record the data. Then place the wooden block on the inclined plane (at 0o) with the wide side down. The height of the pulley should be the same height as the screw location on the wooden block. Then hang a weight on the opposite side of the hanger and add weights until block starts to move with a constant velocity (push block to overcome fs¬). Then record the resulted weight of the hanger in Table 1 (as F). Add 500 g to the wooden block and repeat the process. Replace 500 g with 1 kg on the wooden block. Repeat the process described above.