Population density

initial mass of the beaker was subtracted to obtain the grams of water in the beaker. Using the temperature of the water, the density could be found, allowing for the theoretical volume of the water to be found. The percent error could be found once we had the theoretical volume compared to the measured volume. The water trails were similar in temperature, thus the density were similar throughout the experiment. The burette trails had an average percent error of -0.466% compared to the…

Population. Population, biologically defined as the summation of members of a particular species or group within a set region or community. For mankind, population has been the double edged sword and, the blunt shield that have allowed humanity to dominate this flying space-rock known as Earth. The population avaliable to a society meant the amount of workers which can gather, use, and produce various resources. This combined with the ability of humanity to use tools and technology, allowed…

Density Open Response Density Density is the mass per unit of volume of a substance. Density is measured in grams per milliliter (g/mL), or grams per centimeters cubed (g/cm3). The density of an object is what causes it to sink or float. If an object has higher density than the liquid it is being placed into, it will sink. If an object has a lesser density than the liquid it is being placed into it will float. For example, the density of…

ratio of M-S-H binder In development of M-S-H binder with magnesium oxide and silica fume, it is noted that silica fume has rather low specific gravity (S.G) and bulk density compared to Portland cement (PC). Thus, use of high silica fume content in the binder consequently results in a binder system of low specific gravity and bulk density, compared to PC. The light weight binder leads to a difference in water to binder ratio (by mass), compared to PC. To compare water content by mass of M-S-H…

When the egg was placed into syrup, a hypertonic solution, it shrunk in size. This result supports my hypothesis. The mass of the egg before it was placed in syrup and after it was placed in syrup changed drastically. There was a 16 g decrease in mass that happened to the egg during its time in the syrup. Both the long and short circumference of the egg decreased. The long circumference before the egg was placed in syrup was 18.75 cm and after it was taken out of the syrup the long circumference…

of the eggs is greater than the density of water. Then salt water 1-2 a spoon and stir in the eggs slowly, still also sank because of the eggs is still greater than the density of water. Drift An object that is dipped into the liquid will float if heavy objects are similar in style to the top or the object in equilibrium By the time the water was given a 2 ½ spoon of salt and stir gradually then egg will be on a State of drift. This happens because the density of water is equal to the mass…

Lab 4 in Chem 115 has three parts all calculating density. In part one, a 100 mL beaker, a volumetric pipet, and an analytical scale were obtained. To begin, the mass of the beaker was taken using an analytical scale. Then, 10.0 mL of an unknown liquid was transfered to the beaker using the volumetric pipet. Next, the mass of the beaker and liqiud was recorded along with the letter identifying the unknown liquid. By subtracting the mass of the 100 mL beaker from the mass of the beaker and liquid…

In this experiment the students were required to provide urine samples three times in 60 minutes. This experiment was done to test urine volume, flow rate, total dissolved solids, and pH at each interval and record the differences in these variables depending on what each participant was asked to eat or drink. I hypothesized that the subjects asked to eat pretzels and drink soda would see an increase in total dissolved solids in their urine. In this experiment the 20 test subjects had to provide…

Data Calculated from Experiment Solid-Liquid Weight (g) Solid-Liquid % Recovery Liquid-Liquid Weight (g) Liquid-Liquid % Recovery Acid 0.01 20 % 0.028 56 % Phenol 0.011 22 % 0.001 2 % Amine 0.013 26 % 0.005 10 % Neutral 0.03 60 % 0.026 52 % Table 1 shows the data obtained from this experiment of both the solid-liquid extraction (on the left side of the table) and the liquid-liquid extraction method (on the right side of the table). It shows that in the solid-liquid extraction, most of the…

One of the most well-known developments from the industrial revolution of the 20th century is none other than revolutionary technology. The technology created within this revolution was not designed with the intention to expand population size, but it was one of the byproducts of the new technology. For example, the remarkable invention of chemical modifiers (pesticides and herbicides) had some unforeseen consequences. Pesticides were designed to kill harmful bugs/creatures; while herbicides…