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It was in 1883 when Osborne Reynolds, a famous scientist and engineer tried to experiment on the relationship between the stability of fluid motion and the transition to turbulence. His final apparatus consisted of a glass-sided tank, 6 feet long, 18 inches deep and 18 inches wide. Inside it was a glass tube with `a trumpet mouth of varnished wood, great care being taken to make the surface of the wood continuous with that of the glass'. On the right-hand side, the tube was connected to an iron pipe equipped with a valve which could be controlled by means of a long lever. On the left-hand side is the device for introducing a streak of dye into the trumpet, while a float and dial indicated
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Stanford Prison Experiment 6The Stanford Prison ExperimentYour NameInstructors NameCourse NameDue DateINTRODUCTIONUnderstanding human beings, their thoughts, feelings, and behaviors has always been a fascination of society. While human beings, as animals, are dependent upon a certain number of biological imperatives; the most basic needs, wants, and desires. Psychology looks not solely at the physical but the psyche of human beings. They seek to understand why some people react differently to differing situations and are some behaviors able to be triggered based on a scenario or created environment. Psychology has always simulated environments in order to gauge people's responses or to see
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Alejandra Torres
06/23/18
Sociology 101
10am - 12:10pm
I coordinated my “Do Nothing Experiment” at the entrance of Target on a
Saturday evening. Fortunately I had picked a good hour, because it was pretty busy.
People came in with their kids, spouse, or friends. Most of them looked rushed as they
hurried to get a cart and speed walk to their destination, but a few of them looked
relaxed as they stopped at starbucks to grab a drink, and browsed the $1, $3, and $5
section. As far as I know no one noticed me, I had 2 people glance over at me for a split
second, but went on with their shopping without a word or a smile. Everyone was to
busy with their needs to try and focus on what i was doing
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) sunflower oil concentration,
Quadrant C did not have peas added,
and Quadrant D included 10 black-eyed
peas with a high (20 ml/kg) concentration (Figure 1). Five male and five female beetles were
USC ID: 8870
LAB SECTION: 13148
3
then added to Quadrant C. Their sex was determined by placing each beetle under a dissecting
microscope and examining the sex-specific size and coloration of their posterior abdominal
plates. In the Petri dish, the beetles, initially placed in Quadrant C, were able to move freely from
quadrant to quadrant. The experiment was conducted in a total of 16 plates that were left at room
temperature over the course of a week. After one week, peas were removed from the plates and
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Gardens snails’ response to environment change Lily Espinosa
Introduction:
The invertebrate that was chosen for the experiment was the Snail Gastropoda. Snails like moist and shady areas, to protect themselves from harmful weathers. Snails also like soil and fresh leaves because they have easy access to food and moist conditions. Snails don’t like pees and tomatoes and its unsafe for them to consume pasta. Salt and water also both kill snails, this is because snails drown in water easily and salt dehydrates the snail leaving it to die. Snails are hermaphrodite and nocturnal.
Hypothesis:
VARIABLES
Control- normal or ideal conditions
Dark, damp and humid conditions.
Independent
(What and how
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Lab Experience Report Format Prevention I 111-114 AB
Lab # & Title Name: Karnik Patel
( Lab 3 - Chocolate cookie experiment pH=7.0 ) Date: September 21, 2018
Objective: (1)
Why are you doing this? Point form.
· This lab is to practice everything we have learned in all our previous labs and lectures, also on all of the inter dental products available for all types of patients that have specific needs.
· To compare pH levels and BFS sheets from previous labs to see
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1
ChE 494/598: Homework #1 (Group Assignment), due Tuesday, Jan. 24
1. Please identify a challenge that the science and engineering community is facing and write a
T.I.M.E. problem statement.
2. Please discuss individual and/or group goals within your homework group. Select one of them
and write a S.M.A.R.T. goal.
3. Famous Card Drop Team Exercise (The following exercise is an adaptation of a famous
experiment popularized by W. Edwards Deming.)
There are 3 roles associated with this exercise: a “Machine”, an Operator and a Manager.
Work Rule #1: a. The machine stands with one arm fully extended at shoulder height,
b. As carefully as possible, the operator aligns the hand of the machine
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water. Prevents contamination and kills all unwanted microorganisms.
2. Clean bench with disinfectant solution, this will kill microorganisms that could contaminate the experiment.
3. Measure 9.2g of agar powder and 500ml distilled water in a conical flask, and hold the flask above a flame whilst constantly stirring the mixture while heating.
4. Boil the mixture for a minute, and then proceed to remove it from heat.
5. Use the sterilized thermometer to monitor the temperature until it falls to 45-50℃
6. Pour about 3mm depth of melted agar into each sterilized petri dish. Don’t let the conical flask touch the petri dish, cover the dish immediately to prevent contamination and tilt the dish
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Summary
The purpose of Experiment 4 was to determine the effects of concentration on the amount of light transmitted through aqueous solutions.
The general procedure used in this experiment was to first prepare an undiluted sample of copper sulfate by obtaining two clean cuvettes. One of the cuvettes was used as a blank sample filled with deionized water which served as a solvent, and on the other cuvette, it was rinsed out with 0.5 mL of the copper sulfate solution and filled up with about 80% of the same solution. The second cuvette served as our undiluted solution. Next, 3 diluted solutions of copper sulfate are prepared. The first diluted solution was equal to 50% of the stock copper
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Pathos
Logos
Informative Speech Outline
General Topic
Specific Purpose
Thesis-My purpose is to persuade my audience that it is not morally acceptable to
experiment on non-human animals to develop products & medicines that benefit human
beings.
I.
a. Did you know that 100 million animals are killed in U.S laboratories for biology
lessons, medical training, curiosity-driven experiments and chemical, food and cosmetic
testing?
b.My purpose is to persuade my audience that it is not morally acceptable to
experiment on non-human animals to develop products & medicines that benefit human
beings. Inform you about the dangers & how inhuman
c. Many believe that hurting helpless animals is
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Title:
Paper on Water Cup Inversion Experiment
Submitted By: Theodore Xavier Pueda
Submitted to: Mr. Roach
Title: Paper on Water Cup Inversion Experiment
Testable Question: Does the volume of water affect the time for paper to drop from cup?
Hypothesis: As the volume of water increases, the time for the paper to fall off the cup stays the same.
Experimental Design: Different volumes of room temperature water will be poured 9 similar cups, starting with 10 mL and increasing by 10 mL each time. A piece of paper will be placed on top of the cup and the cup will be inverted.
Independent Variable: Volume of Water (mL)
Dependent Variable: Volume of cup (mL)
Rim diameter of cup (cm)
Temperature
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. Science tells us that objects themselves possess the colours they do not absorb. Because plants do not absorb green, they must themselves be green (Canna.com.au, 2017). The colour lights to be used for this experiment will include green, blue, red, yellow, clear and black.
The aim to this experiment is to observe the growth rate of plant under different colour of light and to determine which colour could improve the productivity and thus used as sustainable sources in plantation. It is hypothesised that that the plant with clear plastic will grow the best because the white light contain all the primary colours in it. The colours of the rainbow, red, orange, yellow, green, blue, indigo and violet
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EXP 38: Qua. NH4+, Mg2+, Ca2+, Cu2+
➢ Experiment 38
· Skip parts A and B (NO FLAME TESTS)
· Only doing parts C-F
· Start warm/hot water bath in fume hoods incase needed later.
· Groups must grab one known/reference solution and one unknown (write letters down)
· ▪ One lab partner will do experiment with known/reference solution.
· ▪ Other partner will do experiment with unknown to compare with known.
· All blanks must be filled out excluding first two flame tests.
THE FOLLOWING PROCEDURE SHOULD BE DONE FOR BOTH REFERENCE AND THEN UNKNOWN.
TEST TUBES SHOULD BE HELD WITH TEST TUBE CLAMPS TO AVOID ACCIDENTAL SPILLING OF CHEMICALS ON STUDENTS WHILE HOLDING TEST TUBES.
Part C – Fume Hood
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1.The figure above is the comparison of the R() correlator for different centralities (40% - 50%, 50% - 60%, 60% - 70%). The concave shapes of the results at all the centralities indicate the presence of CME-driven charge separations. The opening of the concave shape for 60% - 70% centrality is narrower than the others (magnitude of a1 is the largest among these); this indicates the CME-driven charge separation signal is the strongest. The decreasing width of the opening with increasing centrality is an expected result since in the Au+Au collision; a higher centrality means that the spectator particles are larger (? More of the spectators will remain intact). As a result, the magnetic field
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Running Head: A Class Divided 2
2
A Class Divided
Contents
Summary 3
Hypothesis 3
Independent variable 4
Dependent variables 5
Students behaviour 5
Phonic card exercise 6
Present day Class 7
References 8
Summary
A class divided experiment was conducted by Jane Elliott, internationally known teacher, lecturer, diversity trainer, and recipient of the National Mental Health Association Award for Excellence in Education. In response to the assassination of Martin Luther King, Jr. in 1968, Jane developed a controversial and astonishing experiment. This experiment labels participants as inferior or
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Year 8 SEAL – Assessment Task – Experimental Process
Part 1: Introduction
The experiment that is being conducted is about acid + metal. When an acid and a metal react with each other they normally produce salt and hydrogen gas. The amount of salt is produced according to the acid and metal being tested. The interaction between a metal and its environment is called corrosion. In this experiment the acid that is used is Hydrochloric Acid and the metal which is tested is Magnesium. When these are being tested Magnesium chloride and hydrogen gas is going to be produced. The research question for the experiment being conducted is “Does the amount of magnesium effect the amount of gas produced
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Milgram Obedience Reaction Report
Before I read the Baumrind and Milgram article, I watched the video of Milgram performing the Obedience experiment and did not conclude that the experiment was ethical. I believe that the test-subjects were being manipulated and in result, they were experiencing torment. From an act-utilitarian perspective, I believed that the benefits outweighed the costs but still, I believed that the ethical standards that allowed Milgram to perform this study were immutably preposterous. I believed that there was short-term suffering that happened to the subjects, such as the sweating, cognitive dissonance, and other negative symptoms that the test-subjects expressed. I
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Introduction
In this experiment, I am required investigate the correlation between the temperature of a biological chemical (hydrogen peroxide) and its effect on enzymic activity of the catalase enzyme. This experiment requires understanding regarding the topic of enzymes and the investigative ability to carry out effective experimental designs. Catalase is responsible for breaking down hydrogen peroxide in cells which is produced as a result of cellular respiration, and prevent cell death, by not allowing the chemical to accumulate within the body. This investigation models the action of enzymes in cells where hydrogen peroxide is the substrate and catalase the enzyme representative of the lock and
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phenomena, or to predict quantitatively the results of new observations.4. Performance of experimental tests of the predictions by several independent experimenters and properly performed experiments.The roles of observation and experiment are meant for scientists to sit back and watch the thing the want to experiment (observe it over a period of time) and then make an experiment to see if their hypothesis was, what they though it would be. No one can just state that their idea is true with out observing and experimenting because there is the possibility that it is not accurate. Scientific law is a statement of fact that tries to explain why everything is the way it is. It must be use universally
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Untitled
Mass conservation
AIM
The aim of this experiment is to show that mass is conserved during a chemical reaction.
The Law of Conservation of Mass, established in 1789 by French Chemist Antoine Lavoisier, states that mass is neither created nor destroyed in any ordinary chemical reaction. Or more simply, the mass of products by a chemical reaction is always equal to the mass of the reactants. (E, Durnford
1999)
The reaction between potassium iodide and lead (II) nitrate under room temperature and atmospheric pressure results with a yellow precipitate. This reaction can be expressed by the equation: 2KI(aq) + Pb(NO3)2(aq) PbI2(s) + 2KNO3(aq)
HYPOTHESIS
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Resistance in a wirePlanning -The resistance of a wire can be affected by certain factors:Length of wireCross sectional arearesistivity (type of metal)Type of wireTemperatureI chose to investigate how length affects the resistance in a wire. This means that the other factors (variables) must be controlled. This means I must keep the same type of wire, the same material of wire (a preliminary experiment will help determine this), and the same cross sectional area and maintain a constant temperature of the wire as any increase in temperature increases resistance. These factors must me kept controlled to ensure a fair test.Preliminary ExperimentI conducted a preliminary experiment to determine
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1.Problem / PurposeThe purpose of this experiment is to investigate the properties of an enzyme - substrate reaction2.HypothesisHydrogen peroxide is a very reactive compound that can be used for a variety of reactions including bleaching and disinfecting minor wounds. Acting as an oxidizing agent, it is also toxic to cells, hence its value as a disinfecting agent that disrupts the metabolism of bacteria. Our body cells and those of many other animals contain an enzyme called catalase that accelerates the conversion of toxic hydrogen peroxide to water and oxygen gas.In this experiment, if the concentration of the enzyme is increased, then the reaction will proceed faster and if the
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ligands that inhibit ribonuclease H activity associated with the HIV-1 RT. With SELEX scientists have been able to isolate oligonucleotide sequences, which are emerging as a class of molecules that fight antibodies. Many of the oligonucleotides selectively inhibit the DNA polymerase actively. Most of the compounds inhibiting the HIV-1 work by inhibiting the DNA polymerase function on the RT. Some of these compounds are AZT, ddI, ddC, and nevirapine. In the experiment that they carried out they found that the molecules that they chose in this experiment do not share features with the DNA aptamers previously isolated against the HIV-1 RT. The aptamers were predicted to form pseudoknots
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; Materials:1000 mL glass beaker, tap water, 0 to 110°C-glass tube thermometer, ice cubes, stop watch, Voltmeter (0-20 V), Ammeter(0-2 A), NiCr wire, Crocodile Clips, digital scaleProcedure:i) Assemble the apparatus as show in the diagram. Heat is applied by adding energy to the system.ii) Put a hand full of ice into the beaker and fill up with water. Mix significantly until the change becomes insignificant. Measure the mass of the water (total mass - mass of empty beaker). Read of voltmeter and ammeter, readings should stay constant. Do NOT add additional energy at any point during the experiment. Leave the beaker on the scale, since we are going to read off the mass of the
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Aim:Do people in all cultures perceive pictures in the same way, and if they do, can we regard pictures as a universal language.Method:Review article investigating the differences between cultures in the way they understand pictures.Sample:Adults and children from an African country.Children from a school in Zambia.Procedure:African children were shown pictures which contained different depth cues. These included familiar size, overlap and perspective drawings. They were asked 'What do you see? And other questions relevant to the pictures and the study. The questions were asked in the subjects' native language.Another experiment involved Zambian schoolchildren copying a straightforward
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successful at operating the program to be able to execute the actual experiment.
Explanation of Results
With the inlet and outlet temperatures, there seemed to be a negative correlation between the two. This was due to the exchanger bringing the hot and cold water to equilibrium. The LEGO NXT program recorded temperature every five seconds and would make its adjustments to the valve at twenty degree rotations. The program opened and closed the cold water valve to regulate the temperature between a five degree range. As the experiment went on, the two outlet temperatures became closer to the same temperature. The inlet temperature decreased while the outlet temperature increased bringing the
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towards its equilibrium. Because of this we can apply the simple harmonic equations to this experiment. A bob was attached to one end of the string and released from different starting points. The point of pulling the bob away from the equilibrium point and releasing it from different lengths was to determine whether the amplitude had any effect on the period because it makes sense to believe that something far away from its equilibrium would take longer to get back; however, the further the bob was from equilibrium the more potential energy it gained, making up for the distance away from the starting point. According to the graph Amplitude vs. Period, there was no significant relationship
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Added
The following data refer to an experiment in which a measured mass of solid is added to 10.0 g of
20 °C water. The mixture is stirred and allowed to sit for 3 hours. Ten separate trials are conducted for
the experiment.
11. Four of the trials in Model 2 correspond to beakers A, B, D, and E from Model 1. Write the letters for those beakers next to the corresponding trial numbers in Model 2.
12. Identify the following variables in the experiment in Model 2.
Dependent variable Independent variable Controlled variable(s)
13. Sketch a graph of the data for the experiment in Model 2. A space has been provided next to the data table. Be sure to consider which variable belongs on each axis
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Abstract
The effects of cognitive performance of manipulated on a short period exercise. The following experiment is to warrant a clear understanding whether or not participants will work better after a physical activity component after being subjected to the Arousal Theory to enhance their cognitive performance. The Arousal Theory suggests that arousal of stimuli can act as a motivator towards or against cognitive performance. The participants for this experiment were asked to partake in two tasks to determine whether or not our hypothesis proved accurate, by doing so we manipulated two variables; the independent variable, the duration of an exercise task, against the dependent variable; a
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calculators may be used.
4. Appropriate mathematical instruments may be used.
5. Show the formulae and substitutions in ALL calculations.
6. Round off numerical answers to TWO decimal places where necessary.
7. Give brief motivations, discussions, et cetera where required.
8. Separate information sheets are not attached. Relevant information you might need is as follows:
emf (ε) = I(R + r)
OPTION 1
QUESTION 1
Learners determine the internal resistance of a battery during an experiment. They set up
the apparatus as shown below.
A
V
R
S
.
The following meter readings are displayed:
2
W
V
0
4
Voltmeter reading (V)
Ammeter reading (A)
X
A
0
1
With switch S open
2
Y
V
0
4
With switch S closed
Z
A
0
1
1.1
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that is abundant in warmth and light to enable the flies to reproduce effectively. Another hypothesis on the reaction of flesh flies to the different wavelengths of light is that the flesh flies will prefer green light over the red and blue. The reason this was hypothesized was because green appears to be the darkest and warmest color and the color to absorb light the fastest which will allow it to become warmer in a smaller amount of time as opposed to red and blue.Materials and Methods: The materials and methods used to perform the experiments to test the hypothesis are stated as follows. For the first experiment dealing exclusively with white light, a sample of ten larvae were used
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Introduction:Plant hormones and growth regulators are chemicals that affect flowering, aging, root growth, killing of leaves, promotion of stem elongation, color enhancement of fruit, prevention of leafing, and many other conditions. Very small concentrations of these substances produce major growth changes. All plants produce hormones naturally, and growth regulators can be applied by people to are applied to plants by people. Plant growth regulators may be synthetic compounds that mimic naturally occurring plant hormones, or they may be natural hormones that were extracted from plant tissue. In our plant growth experiment growth stimulants and growth inhibitors were used. Ideally the
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ACME and Galileo
When conducting any experiment, we have to consider other variables, human error being one of the most common occurrences. Other variables include outside forces, in this case air resistance. When ACME observed that Galileo’s theory seemed to be proven false in their factory, they did not take into consideration air resistance when making their argument but only measured the speeds at which the filters fell.
We started the experiment by dropping filters from one meter high. First we dropped a single filter by itself, and then we dropped 3 filters stacked at once. There was a significant amount of time difference between the two, the 3 filters being faster, just as ACME
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.
Forests aren't only trees, however. Healthy forests have a lot going on in them. There are
many different types of forests in the world, ranging from tropical rain forests to the
dense subpolar taiga. To truly understand a forest ecosystem. We must understand the
relationships of biotic species and abiotic things. The forest ecosystem which is being
experimented, has 1700 trees which are the producers, 800 deer (primary consumers),
200 bears (secondary consumers) and 20,000 mushrooms ( other producers). This
experiment explores the affect trees which are one type of producer in the ecosystem
have on mushrooms the second type of vegetation on the ecosystem. This experiment
also
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The Effect of Temperature on Enzyme Activity
The purpose of this lab practice is to investigate the effects of temperature on the denaturation of enzymes.
Introduction: The main biological concept explored was enzyme activity, enzymes are biological molecules (proteins) that act as catalysts and help complex reactions occur everywhere in life. Enzymes are impacted by temperature and pH of their environment, because these factors can denature an enzyme. Denaturing an enzyme is the process of altering the shape of an enzyme, making it unable to serve its proper function. The independent variable in this experiment is the temperature of the catalase (enzyme). The dependant variable is the
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763 words - 4 pages
Jason Gutierrez, Oswaldo Guzman
Mrs. Garcia
Honors Biology Period 3
1 October 2018
Balloon Rocket Car
Hello everyone my name is Jason Gutierrez and my partner is Oswaldo Guzman and in our
experiment is Building a Balloon Rocket Car. The water bottle forms the chassis or body of the balloon
car, by starting this we mounted the wheels on this body. The purpose for this experiment is that to see if
the pressure of the balloon pushes the air right out the nozzle of the bottle which creates the car forward.
What we did to make this happen is we used a regular empty bottled water, drinking straws, a couple of
plastic bottle caps, balloon, and regular tape. We first stretched out the balloon by
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920 words - 4 pages
Nazanin Rahat
Term paper, Bio 199
Longhurst/Malik lab
What is important in scientific investigation?
Scientific researches aim to gather all the observations, hypothesis, experiments, knowledge and data together in order to first identify the relationships and, second …mechanisms and third create new solutions to the exciting problem. The role of scientific investigation and experiment is to transform the theoretical ideas into practical and testable form .Then the scientist in position should convert all hypothesized techniques and strategies to prove the accuracy of the hypothesis. Another wordsword, the scientific research is the objective method for proving an observation, claim or
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IntroductionI am going to investigate how the concentration of hydrogen peroxide affects the rate of reaction between the hydrogen peroxide, and it's enzyme, catalase, which is found in yeast. There are many other factors which will affect the speed with which this reaction can take place.These include;-The concentration of the substrate (Hydrogen peroxide)-The concentration of the yeast solution-The temperature of both the substrate and of the yeast solution-The ph of the substrate.Key FactorI am investigating the effect on the speed of the reaction of the concentration of the substrate in this experiment. I will do this by changing the concentration of the hydrogen peroxide, and measuring
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Abstract
This experiment investigates how changing the temperature of water will affect the rate of osmosis of water into the potato cubes. This relates to a specific biological process in the body such as osmosis of water between the extracellular fluid of blood and the red blood cells. By investigating, the effect of temperature on this process of osmosis will allow better understanding and ultimately answering the question of- how does changing human body temperature (eg. fever, hypothermia, hyperthermia) effect hydration levels of red blood cells in the body? It is hypothesised that increasing the temperature will cause the rate of osmosis to increase at a faster rate due to the
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) experimental trails were composed of one true participant and one confederate. Milgram’s study deceived true participants, who were made to believe that they were truly inflicting pain on the learners. Participants were however told the experiment would be studying the effects of punishment on learning ability. Both participants thought they had an equal chance of playing the role of a learner or of a teacher. Though, the process was rigged so all true participants would play the role of the teacher. An experimenter, then told the participant to administer a shock to the learner each time he gave a wrong response. With every shock, the participant was then instructed to move one level higher on the
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Osmosis & Diffusion Lab - Dialysis TubingBackgroundThe movement of molecules through a cell membrane is termed osmosis or diffusion. Such movement is principally possible because nutritive molecules are smaller than membrane micropores. If the molecules are too large, no molecular transfer, or diffusion occur.Thus, some membranes may transmit selectively and are termed semi-permeable membranes. In the following experiment, cellophane dialysis tubing serves as an excellent representation of the cell membrane. The enclosed tube may, for the purpose of this experiment, be considered a single living cell in greatly enlarged form.MaterialsGlucose Solution, Starch Solution, Iodine Solution
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Kymara McFarlane
Biotech CP
Mrs Laquerre
December 27, 2017
Letter to a friend
Dear Kiana,
I’ve done an experiment that was very interesting and fun in biotech class. What i did in this
experiment was extract my very own DNA in order to make a DNA Necklace. DNA is a
Deoxyribonucleic Acid and what it does is store genetic information. The structure of DNA is
two
molecules that are organized into a ladder called the Double helix. Each molecule is made up of
millions subunits called Nucleotides.
The Phosphate and sugar molecules form the spine of the DNA molecule. There are three bases
that form the rungs which are made up of nitrogen. There are four Nitrogen bases which are
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394 words - 2 pages
Euglena Experiment Biology 101 Euglena are one-celled organisms in the Protista kingdom. They are usually photosynthetic autotrophs but they have the ability to live as heterotrophs b y ingesting food. They do this when photosynthesis is not possible. Euglena are highly motile and reproduce rapidly. In this experiment I intend to collect enough data to back up my hypothesis. My hypothesis is that the Euglena are attracted to darkness. The material that I used were a microscope, a clean glass slide, a cover slip, a small dish filled with water, a piece of construction paper, a colony of Euglena and a dropper.First I prepared my microscope by placing the small clear glass dish
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“Carbon Transfer Through Snails and Elodea” lab activity.
Procedure:
1. Read through the background information and purpose. Create your own question for what you are investigating in this experiment.
a. Problem (in question form): How are photosynthesis and cellular respiration related?
2. Obtain 8 test tubes of equal size/volume and number the test tubes 1-8. Fill each test tube with approximately 30 mL of deionized water.
3. Add enough bromothymol blue (BTB) indicator to solution to each test tube to change the water to a green color (about 3 mL).
4. What is Bromothymol Blue? Why is the BTB in the test tube green (Hint: recall the teacher demonstration)?
Bromothymol blue is an indicator that
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Reformation of Copper Through the Copper Cycle
Authors:
Lauren Yarborough* and Alex Farish; Chemistry 112 Section 505.
Introduction:
Copper is a very important element due to both its chemical and physical properties but has its down sides when it comes to being earth-friendly. Since copper isn’t biodegradable, it just accumulates over time. In this experiment, both my lab partner and I looked at the chemical reactions of copper as it underwent the copper cycle.
Materials and Methods:
In the first part of this experiment, we obtained 0.2497 grams of copper turnings and placed it into a 50mL beaker. We then obtained 5mL of 6 M HNO3 and placed it into the beaker with a magnetic stir bar to
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when the salinity levels of water are changed.
Aim
To understand if different amounts of salt (NaCl) added to water effects it’s surface tension.
Hypothesis
If salt is added to water, then it will increase surface tension.
Equipment
1. 4 Beakers
2. Tweezers
3. Roll of aluminium foil
4. Pen
5. Scissors
6. Masking tape
7. Grains of rice
8. Salt
9. Distilled water
10. ½ tbsp measure
How I will insure validity and reliability within the experiment
The experiment only uses quantitative results and is repeated multiple times, the averages are used as the final data. This along with keeping all variables other than the independent and dependant controlled. Allowing for a valid and reliable experiment
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Brittany Ngo
Kinesiology 1070A
September 28, 2016
Assignment 1 - Rehabilitation Psychology
The results of an experiment that compared the effectiveness arthroscopic
surgery to placebo surgeries was published by the New England Journal of Medicine in
July 2002. The experiment was performed because researchers wanted to assess the
efficacy of arthroscopy for treating osteoarthritis in the knee. Patients who have
undergone arthroscopy have given account of symptomatic relief for their knee pain.
Essentially the rationale for the execution of the study was to acquire evidence in order
to determine if arthroscopic lavage (with or without the removal of damaged tissue)
yielded better results than
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Samuel Brown & Himesh Premalal Monday April 23rd, 2018
EXPERIMENT 10
Chemical Equilibrium: Reversible Reactions
Introduction: The objective of the experiment is to study the effect of stress on the position of equilibrium. This lab focused on the concept of equilibrium and how it can be shifted either to the left or to the right by adding or removing parts of the equation. Chemical equilibrium can be understood as when the forward reaction is equal to the reverse reaction. The goal of the experiment was to see this equilibrium by observing the color change and determining what color changes mean in terms of the reaction and equilibrium
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the organism is to the particular antibiotic. An antibiotic with a large zone of inhibited growth may be less active than an antibiotic with a smaller zone (Murray, 1983). The hypothesis is not supported in the data because the aritficial sugar, aspartame, resulted in higher diameters of zone of inhibition compared to the natural sugars, such as cane sugar and honey. The higher zones of inhibition found in the artificial sugars is interpreted as more active in the microbiome compared to natural sugars.
The most challenging part of designing an experiment is trying to control or account for all possible factors, except the independent variable, which in this experiment is the type of sugar
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