Some possible sources of error are how much water was put in the rocket, damaged measuring instruments, and inaccurate distances from the launching pad. The procedure of the lab instructed to put in 250 ML of water into the rocket but that may not have always been the case. Some people could have been holding the beaker which we measured the water in and that can make the water splash around. This would make it hard to get an exact measurement. It is possible people put in more water than instructed to add more fuel. Measuring the water precisely was not a strictly enforced rule and mishappens can happen. This would cause for an unfair advantage or disadvantage to whom did not put the equal amount of water as everybody else for their rocket
Possible errors include leaving in the test strips for too long, draining too much water into the aquatic chamber (overfilling/watering), and inverting the tubes for a shorter amount of time than required. Although there are many possible human errors that could be committed in this lab, it is important to note that the tools used for water testing could be expired and could therefore not work as well at detecting the proper levels for dissolved oxygen, pH, and nitrate.
In this experiment, there were several objectives. First, this lab was designed to determine the difference, if any, between the densities of Coke and Diet Coke. It was designed to evaluate the accuracy and precision of several lab equipment measurements. This lab was also designed to be an introduction to the LabQuest Data and the Logger Pro data analysis database. Random, systematic, and gross errors are errors made during experiments that can have significant effects to the results. Random errors do not really have a specific cause, but still causes a few of the measurements to either be a little high or a little low. Systematic errors occur when there are limitations or mistakes on lab equipment or lab procedures. These kinds of errors cause measurements to be either be always high or always low. The last kind of error is gross errors. Gross errors occur when machines or equipment fail completely. However, gross errors usually occur due to a personal mistake. For this experiment, the number of significant figures is very important and depends on the equipment being used. When using the volumetric pipette and burette, the measurements are rounded to the hundredth place while in a graduated cylinder, it is rounded to the tenth place.
Throughout The Awakening, water the main motif serves as a catalyst to the metamorphosis of Edna. During the length of the story Edna goes through a process of changes that coincides with the presence of water. Water serves as a conduit for liberation and empowerment that facilitates the rebirth and even death of Edna. In this essay I will argue that the motif of water represents the continual transformations that occur within Edna throughout the story.
Possible sources of error in this experiment include the inaccuracy of measurements, as correct measurements are vital for the experiment.
The more mass the rocket has, the less acceleration it will have using the same force. By adding a small amount of water, the force will increase. This can be described by using Newton’s second law of motion: the net force of an object is equal to the product of its mass and acceleration.
Discussion: The percent of errors is 59.62%. Several errors could have happened during the experiment. Weak techniques may occur.
Osmosis Experiment Planning Aim: The main subject that I will be planning to investigate is the effects of a concentrated sucrose solution on potato cells on the basis of the Osmosis theory. Background knowledge: The plant cell and its structure To understand osmosis in detail I will need to explain the plant cell (which is the cell included in the osmosis experiment) and its cell membrane. Below I have a diagram of a plant cell: [IMAGE] Osmosis is about the movement of particles from a higher concentrated solution to a lower concentrated solution to create an ethical balance via a partially or semi permeable cell membrane. Osmosis in simple terms is the exchange of particles between the cytoplasm inside the cell and the solution outside the cell. What makes this exhange is the partially permable cell membrane.
The molar volume of the H2 in our experiment is very close to the theoretical molar volume, but I think that the deviation lies in the temperature of the H2O: in the first trial it is too high and in the second one too low.
One possible source of experimental error could be not having a solid measurement of magnesium hydroxide nor citric acid. This is because we were told to measure out between 5.6g-5.8g for magnesium hydroxide and 14g-21g for citric acid. If accuracy measures how closely a measured value is to the accepted value and or true value, then accuracy may not have been an aspect that was achieved in this lab. Therefore, not having a solid precise measurement and accurate measurement was another source of experimental error.
...ore reliable if it were possible to do more trials to make sure that the data that was found was correct. This experiment could’ve been more reliable if some mistakes weren’t made like, the inaccuracy of weighing and measuring the potatoes. This could have affected the results by throwing off all the data and giving numbers that were nowhere near accurate. Another mistake that could’ve been made was the amount of solution put into each test tube. Some of the test tubes may have had to little or not enough of its solution. Some ways to fix both of these problems would be to weigh and measure each potato core more than once which is not what was done. A way to fix the inaccuracy of the amount of salt water put into each test tube would be to measure the solutions into a different container to make sure it’s an accurate measurement, then pouring it into the test tube.
...derwent varies improvements, which involved raising the heaters in the oxygen tanks from 28 to 65 volts DC. The oxygen tanks thermostatic witches on the heaters weren’t modified to withstand the changes it underwent. On the final test of the launching pad the heaters were said to be on were vastly long period of time, which enabled the wiring in the vicinity of the heaters causing them to reach high temperatures of (1000F) which had degraded the Teflon insulation. The tank was also impacted from the 8 hours of overheating which was a sign of a potential bomb the next time those tanks were filled with oxygen again. This occurred and exploded on April 13, 1970.”Apolllo 13”
Trail 4) the fourth rocket was filled in an equal manner of 50% Oxygen gas (O₂) and 50% Acetylene (C₂H₂) and in this trail the rocket covered the distance of 2.5m.
A Peak flow meter is a medical device that measures how well your lungs are able to expel air [2.1]. By blowing rough a mouthpiece a peak expiatory flow (PEF) reading can be found. This reading is measured in litres per minute and can be read directly from the device. When the person’s airways are more closed the lower the rate in which air can be blown out. The peak flow meters are used as a simple and efficient way of monitoring how well your lungs are and see if there functioning properly.
Water rockets have been a source of entertainment and education for many years. They are usually made with an empty two-liter plastic soda bottle by adding water and pressurizing it with air for launching (like the image to the right).
There is also the potential of human error within this experiment for example finding the meniscus is important to get an accurate amount using the graduated pipettes and burettes. There is a possibility that at one point in the experiment a chemical was measured inaccurately affecting the results. To resolve this, the experiment should have been repeated three times.