Unidentified Ufo Lab Report

Three trials were done. All three trials were done the same way. In trial one, the weigh boat was first zeroed on the scale. Five grams of the white unknown mixture was measured on to the weigh boat.

In almost every experiment, there’s an independent and dependent variable, a constant, and a control group. The independent variable in this lab was the coins. The dependent variable was the density. The constant was the amount of water. In this lab, there was no control group .

If we were given a random sample of pennies, then we could measure the mass and the volume of the pennies. From these measured values we could calculate the density. Then we could compare our calculated density to the given density value of copper and we could find the the percentage of error between copper and the measured density. Conclusion: If the percentage of error between the copper and the measured density of the pennies was large and the values were not in comparison to the density of copper, then we would know that the density of a penny is not the same as the density of pure copper.

Volume Lab In this four parted lab the purpose is to use measurement and water displacement and calculations to find the volume of various objects. Part A questions were how much drops of water were needed to make 1mL the original hypothesis made was ten drops however this was proven wrong once the data in which twenty drops of water rose 10 mL of water to 11 mL of water, nineteen to rise from 11 mL to 12 ml, and finally eleven drops of water to rise from twelve mL to thirteen mL. Once the average was calculated which was 16.6 drops, which meant on average that's how much it needed to make one mL. By subtracting from the average with the hypothesis the hypothesis was revealed to be 6.6 drops off. Part B questions were based on water displacement. In which the question was how much was the difference between 20 mL of water and 3 marbles.

In chemistry, elements have properties that distinguish them from one another. Despite the various chemical properties, one of the most important physical properties is a property known as density. Density was first discovered in 250 BC by the Greek mathematician Archimedes when he compared real and fake gold by placing both in water. The key principle is that density will affect whether objects float or sink. If an object has a higher density than its surroundings, it will sink.

In this experiment, the mass of the object is the independent variable. Mass is how much material an object has. (Singh, Lakhmir, 2012) It is the only variable that will be changed throughout the experiment. The dependent variable is what one observes or measures.

The purpose of this experiment was to use a pH meter to graphically determine a stoichiometric point, to determine the molar concentration of a weak acid solution and the molar mass of a solid weak acid, and to determine the pKa of a weak acid. In part A of the experiment, the unknown named Luke Skywalker was used during the experiment. Throughout the experiment the experimenter collected measurements such as the number of moles of NaOH to stoichiometric point (0.00115 mol, 0.00105 mol) and the molar concentration of the unknown acid (0.046 M, 0.042 M) during part A of the experiment. During Part B of the experiment the experimenter collected buret readings of NaOH and determined the stoichiometric point and volume of NaOH dispensed. Based

Access the “Why do things float?” interactive from our Physical Science webpage. It is listed in the “Unit 2” section in the middle column Read the sidebar information on the left side of the screen and answer the following questions in complete sentences on your graph paper: What is the buoyant force? The buoyant force is the upward force that opposes gravity.

To be able to conduct this experiment multiple materials were needed, and these materials were a measuring cup, a food scale, and 12 oz of the following drinks; water, Pepsi, Root Beer, Sprite, and Mountain Dew. The measuring cup was used to measure the amount of each soda. This was used to make sure that no mistakes were made while setting up the experiment. A food scale was used to measure the weight in ounces of the drinks. This was done to measure the change in weight over time.

In the first data table, set up the salinity of water for 0% before record any data in data table 1. Record weight of empty graduated cylinder. Add 300ml of warm water to graduated cylinder. Record the weight of the graduated cylinder and water. Record weight of water using calculation, then add 1 golf ball to the water in a graduated cylinder.

Moreover, the density of an object can be obtained using the formula p=m/v- where p is the density of an object, m is its mass, and v is the volume. This

There were four different small experiments to look at density. In experiment 1 a balance was taken and put to zero. Then a 50 mL graduated cylinder was put on the balance. The mass was

Place the the beaker onto a hot plate that is on a low heat setting (about setting 3). Every 5 minutes for 20 minutes, measure the circumference of the balloon and record it in Data Table A. You can measure the circumference of the balloon by looping a piece of string around it then using a ruler to measure the string’s length. Record the data in the data

The density of the metal object was then calculated using the formula density equals mass divided

During this investigation determining whether three separate objects of different sizes, colors and shapes are made of the same materials. There was a grey cube, a cylinder and a silver cube. Based on the human’s vision, you can tell that the silver cube and cylinder are the most similar thus predicting that they are made of the same materials. Density was measured to help determine the similar in materials between each of the 3 objects. The density of a substance is the relationship between the mass of the substance and how much space it takes up.