Quentin Flattmann 9/25/15 Biology 9 Mr.Rosenfeld The Paper Towel Lab Background: Paper towels are in almost every household in the U.S. Each year over 13 billion pounds of paper towels are used in this country. This means the average person uses over 43 pounds of paper towels each year. Paper towels are part of daily life: it’s important to know which brand is the best.…
After the bunsen burner was turned on, and the flame was gauged to be of adequate length (must be able to see changes in color), a nichrome wire was dipped into the test tube of the unknown, and then the solution-covered segment of the wire was placed into the flame. The same was done for calcium chloride and ammonium…
To start this laboratory experiment, we first collected all the materials necessary including multiple beakers, samples of each solution, metal strips, a salt bridge, alligator clips, and an abrasive sponge. Then 10 mL of CuSO4(aq) and 10 mL of ZnSO4(aq) were placed into separate 250 mL beakers. A copper strip was then placed in the beaker containing CuSO4(aq) and a zinc strip was placed into the beaker with ZnSO4(aq). The two beakers were connected by a salt bridge that consisted of a string soaked in 0.5 M KI solution and each end was placed into each solution.…
CONCLUSION: Two weeks ago, Soundings XVI performed Lab Experiment Number Two. Lab Experiment Number Two was similar to the previous, Lab Experiment Number One. The prompt was to compare the results of pennies dropped in water, versus the result of pennies being dropped into milk, both at 100 mL. The main purpose of this lab was to further discuss more scientific parts of this lab, such as the surface tension when the cylinder was close to overflowing for both the milk and water. Before performing this lab, my group and I created a hypothesis to reflect upon and to state what we believed would dictate the results.…
Vectors are Proven in a 2015 Water Balloon Lab Not only do people not know what a vector is, but they also do not realize that vectors are used in everyday life. Vectors include magnitude and direction, without one or the other it would not be a vector. Several components make up a vector; these items are displacement, velocity, acceleration, and force. By finding the components one can find the horizontal velocity, vertical velocity, initial velocity, and maximum height. Physic equations can be used to help solve these problems.…
I found the idea for this experiment on Science Buddies and many people have done the same experiment. Each has made different cars that they think will be the fastest or go the longest distance. Others have tested this experiment, but they put a weight such as pennies, marbles, etc. What I am planning to do is make a very lightweight car that can travel a longer distance. The energy that the balloon will force out is called kinetic energy.…
The slit lamp evaluations for the patient was within normal limit in right eye while the left eye has misdirection of eyelashes toward the cornea, this conditions called trichiasis. The patient has dry eye as result of (TBUT) test. The patient was a good candidate for the contact lens to protect her cornea from the erosions and irritations due to the rubbing and touching of eyelashes to the corneal surface. We were gave her soft toric contact lens according for her refractive error.…
The simple reaction between two substances (Mg and HCL) was performed to determine how different factors such as, temperature, and concentration effects the rate of reaction. There were noticeable differences while determining the effects of concentration of HCL on the rate of reaction. Increasing in the concentration of the HCL, bottom of the test tube became hotter; it’s an exothermic reaction because energy is being released during the reaction in the form of heat. Another, increasing in concentration of HCL reacting with Mg, formation of hydrogen gas bubbles comes out faster and quicker the Mg gets invisible. Further, we record the time taken by each concentration to dissolve the Mg to plot the graph “concentration of HCl with respective…
However, despite the emitted light being distinct and personalized to each cation used in this experiment, flame tests are limited with regards to their inability to identify more than one metal cation present in a solution.13 If two or more cations were present in a solution, the results are highly probable of being classified as indefinite since the color of the flame cannot be clearly attributed to a single cation. The colors of flame tests are also susceptible to subjectivity, especially when it comes to some metals producing similar colors, resulting in certain compounds to become difficult to identify and differentiate from one another. How soaked the wooden stick was in the solution was also a factor that had to be taken into consideration…
The Common Core experiment Writing 122 Joe Spurgeon October 19, 2015 In 2001 the Federal government passed the no child left behind act. This law requires states to create rigorous standardized assessments, then pass at least 95 percent of all students to continue to receive federal subsidies. However, states are not required to meet the same standards, for example, a student in the state of Oregon who passes Oregon’s assessments, could fail the standards of Massachusetts. Thus this led to the creation of the Common Core State Standards in 2009 by the Council of Chief state school Officers and the National Governors Association.…
The objective of the lab was to find the calorie content of Cheetos and marshmallows. To do this we needed to use a calorimeter. The hypothesis was that Cheetos would have more calories because they have more fat in them. The Cheetos and marshmallows were lit and put in an oatmeal can calorimeter. The temputure change in the water leads to finding the calories in food.…
Candles were one of the first few methods in lightening the darkness. A tool that may be seen differently today, but in the past it revolutionized the human race in many ways. The symbolism and the general usage of candles had made a massive part in human society mainly in religious practices. For hundreds of years, these small wax pillars were used not only to brighten up the room, they were also seen as a religious marvels. Although many candles have a different meanings and ceremonies on how they are lit, they ultimately symbolize enlightenment or a presence that is within them.…
Almost all chemical reactions involve a loss or gain of heat. This change in heat is called enthalpy. The goal of this experiment is to calculate enthalpy for three different reactions. To calculate the enthalpy of a reaction, a calorimeter is used to measure the change in heat energy from mixing different substances. The change of temperature is found by comparing the change in temperature of the system to the temperature of the surroundings.…
We carefully weighed the crucible, cover, and magnesium ribbon together. The total mass was recorded. Next, we heated the crucible with the magnesium in it, but we left the cover aside. When the Magnesium started to burn, we put the cover back on to put out the fire. We continued to heat the crucible for a minute before taking off the cover.…
3.2 Performance The first thing to consider when talking about a light bulb’s performance is the brightness. The brightness of a light bulb is measure in lumens (lm). It measures how much light the bulb outputs so the more lumens, the brighter the light. The power consumption is also important to know how many lumens a bulb produces per watt.…