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Report on density measurement
Density measurement lab report
Theory of density measurement experiment
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The hypothesis on whether the mass of the Gummy Bear would increase or decrease was accepted. The data collected during the lab supports my hypothesis because the experimental Gummy Bear's mass for Day 1 was 2.7g when placed on the balance. Then in Day 2, the mass increased to 6.0g. The change in the mass of the Gummy Bear's were 3.3g. The Control Bear's mass on Day One was the same as the experimental Bear's, 2.7g. On Day Two, after being stored in a refrigerator for 24 hours, the mass was still the same staying at 2.7g. Some options for future projects like this are finding the increase or decrease in the density. Or another option is to find the increase or decrease in the measurements of the Gummy
Abstract: Marshmallows have more Calories per gram. Marshmallows have .2079 J/g℃ and cheese puffs have 1.08x103 J/g℃. My hypothesis was that marshmallows have more Calories per gram and my results confirmed my hypothesis because there is a .2068 J/g℃ difference.
The gummy bear in water grew bigger because the water has minerals in it so it can grow more, I know that the one in water is bigger because in the data table it showed the amount of change and the gummy bear in the water grew 0.5cm more than the other gummy bears put in liquid.
In the experiment “ Talking to plants “ from Mythbusters, potential problems include the use of greenhouses with no sound insulation, a non-homogeneous location and the use of only one specie to infer on a population. In another scientific study, researchers chose to use “ a noiseless growth chamber to prevent any effects from extraneous noise “ and the use “ growth chambers under continuous light at 28 c and 65-75% relative humidity “ in order to maintain a homogeneous location for all plants during the experiment (Jeong et al., 2008) . This helped further explain the findings because with the use of noiseless chambers you can assure that the only noise that the plant was receiving was the one given in the treatment and a valid conclusion
The reaction between the sugar in the gummy bear and the melted potassium chlorate in this experiment is an example of an exothermic reaction. An exothermic reaction is a chemical reaction that releases energy as heat or light. When potassium chlorate is melted, it produces potassium chloride and oxygen. When the sugar and oxygen react, energy accumulated in the chemical bonds of the sugar molecules is released. This is a combustion reaction, an exothermic process in which a substance reacts specifically with oxygen to produce heat, water, and carbon dioxide. During the process of combusting the sugar in the gummy bear with oxygen, the products formed are heat, a purple flame (light), carbon dioxide, and water.
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.
To base a conclusion on what the unknown variables are, we need to determine how to start and complete this experiment.
In the analysis, the hypothesis was that pennies made before 1982 were made out of a different substance than the pennies made after 1982. The hypothesis turned out to be true. The pre 1982 pennies were made out of copper which has a density of 8.6 g/mL and the post 1982 pennies are made out of zinc which has a density of 7.14 g/mL. So it can concur that mass for pennies made before 1982 are higher than pennies made after 1982. Some errors were when calculating. The densities for the pennies and making the graphs. When making the graphs, it can be suspected that each graph is wrong could be wrong due to not adding enough data points or misplaced points. For the data tables , it can also be suspected that the density for each data table could
I am going to carry out an experiment to measure the change in mass of
Each different mass (50g, 100g and 150g) was trialled 4 times each and then an average was calculated. The experiment performed supported the hypothesis made which was that if the counterweights mass increases than the distance travelled by the projectile would increase. Why is it supported? Explain using data. The trebuchet worked by holding back the throwing arm and then letting the throwing arm go. Once let go, gravity acts on the counterweights as its heavier (non-contact force) and the projectile was launched where did you get this from? More weight causes the arm to move faster, which is what causes the projectile to launch further.. As the counterweight got heavier the distance increased because gravity acted
The purpose of the lab was to show the effect of temperature on the rate of
The sand is The variables in this experiment were Volume and Temperature. So as to make this a fair experiment, care was taken to ensure that the beaker. was rinsed every time, and that the thermometer was in the room. temperature, so as not to yield any anomalous results. All the results will be taken on the same day, so that the room temperature does not differ, as this could affect the results also. My Hypothesis: My hypothesis is that the temperature of the water will decrease as the volume increases.
Dehaene provides many studies within the book to explain how the unconscious is capable of processing semantic information. In the 1970s Anthony Marcel produced a study in which participants were flashed the word red or blue under the threshold of consciousness, then asked to pick a corresponding color, even though the participant stated that he/she was not able to perceive any word being shown. The study showed that participants were able to choose a corresponding color one-twentieth of a second faster when the word flashed ahead of time was red or blue, instead of an unrelated word. Since the participant was better able to pick the color patch based on the congruent primed word, it can be suggested that the brain is able to unconsciously process
The volume of the liquid inside each beaker after each day was a starting from 200 mL to 170 mL, 170 mL to 160 mL, and 160 mL to 137 mL. This answers my problem question because it shows my data going up to my final answer of 96 grams and a volume of 137 mL this means it has started off a number and has increased and then decreased to a lower number than that start number then increased to a higher number than that other increase. The independent variable is the solutions, the dependent variable is the mass, the controlled variable is temperature, egg classification, and the time. My hypothesis was proven in a way but not thoroughly made clear through each day which means I kind of got it correct I had it correct when the egg will shed or melt its shell that's really
Part A of the experiment, we were measuring the density of water. In this part, we measured by difference by measuring the mass of the empty graduated cylinder which was 46.35 grams and then added 25.0 milliliters of water to it. When subtracting by difference, our mass of the water was 25.85 grams. This was close to the measurements of the water added to the graduated cylinder. The density of the water was 1.0 grams/milliliters.
Our hypothesis for this lab was that the limestone will add mass because it is a sedimentary rock, and weathering and erosion break down a rock. Our data refute our hypothesis because we said it will gain mass when the limestone lost mass. The limestones Initial mass was 3.67, and after we put it in the oven the mass went down too 2.81. The mass went down by 0.86. Also, the graph above shows our data. The red line of the graph was the change in mass after we put it in the oven, and the blue line is the Initial mass. The red line doesn't move that much. After we put the rocks in the oven only one changed in mass. The Limestone changed 0.86 in mass, Quartzite changed 0.00 in mass, and Obsidian changed 0.00 in mass. By that data the oven did not really change the difference in mass. The blue line is our initial mass. Limestone was 3.87, Quartzite was 67.51, and Obsidian was 10.63. In the graph it shows the blue line going up. Our initial mass goes up, but our final mass stayed the same besides the limestone changed by 0.86. In the graph there were two trends. One goes up, and the other one basically stayed the same. The initial mass had a bigger impact because we used 3 rocks, and they were different masses. For the final mass the trend wasn’t that good because two of the final masses stay the same at zero, and the one that changed in mass was only a 0.86