... do otherwise. The person closest to the "beginning" of the platform (the first place the train passes coming into the station) is given the measure meter. Next, as the train enters the station, all stoppers get ready. As soon as the train starts to move out of the station ... , all stoppers start their watches and stop their watches when the back of the train passes them. Then, the person with the measure meter measures the distance between each person to get the displacement. With the time and displacement, one can get velocity. Then, we calculate the ... changes in velocity to find the...

• Word Count: 407
• Approx Pages: 2
• Grade Level: High School

... and electrical processes, and the study of cannabis" effects on these functions is crucial to the further evaluation of this drug. Review: The overall purpose of this experiment is to measure the different cognitive dysfunctions associated with cannabis use, such as memory loss and word recognition. 102 cannabis users, 51 long-term users (avg. use 23.9 years) and 51 short-term ... the subject had sustained brain trauma or sickness, psychotic disorders, were dependant of any other control substance, or any other factor that could affect experimental findings, such as a language barrier. ...

• Word Count: 826
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• Grade Level: Undergraduate

... fact that O2 is produced in the light reaction of photosynthesis, this reaction will make the solution be replaced with gas and make the leaf float. This technique was used for our experiment, to measure the rate of photosynthesis. Our hypothesis was that a color pigment in a leaf, rather than green, will make the rate of photosynthesis much slower. ...

• Word Count: 304
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• Grade Level: High School

... to travel and so more collisions will occur. Due to this, the length increase should be directly proportional to the resistance increase. To measure and record the results for this factor is simple, the results would be collected and could show a connection between the length of the wire and the resistance given by ... keep colliding in the way and making the electrons use more energy. Preliminary Method In this preliminary experiment, I will use different lengths of wires to measure their resistance. The main idea of doing the preliminary experiment was to find a suitable current numbe...

• Word Count: 2546
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• Grade Level: High School

... if the wires are not measured properly. This is an independent variable. I will use a metre stick to measure the wire at eye level for accuracy. The wire must be pulled tight and held into place while measuring to ensure the length is accurately measured ... . Current We need to keep the current the same throughout the experiment because we are not measuring the current. We are investigating the resistance. This is a controlled variable. We will use a variable resistor to keep the current at a constant measure ... at 0.3 amps. Resistance This is a dependant variable because this is what I...

• Word Count: 664
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• Grade Level: High School

... components allowing the user to interact with any model. This experiment was designed to introduce the oscilloscope as a measuring instrument. The oscilloscope is one of the common used tools to measure qualitative and quantitative measurements of voltage, frequency, phase and other measurements. In the present experiment three human produced sounds (hum, whistle and open moth note) were measured and ... Analyzing the value we can conclude that the temperature was higher than at the standard conditions. Other factors are the quality and the precision of the tools used to measure in this...

• Word Count: 993
• Approx Pages: 4
• Grade Level: Undergraduate

... hotter the object is. The words hot and cold describe the temperature of an object. Temperature reveals something's internal energy level. Thermometers are used to measure temperature. An object's temperature controls whether that object will gain internal energy or lose some when it comes into contact with another object. When a hot ... to materials that are used to control these flows of heat. Fiberglass, metal foil, rock wool fibers (mineral wool), and certain plastics are used for insulation because they are poor conductors of heat. When they are in contact with something cold or hot...

• Word Count: 1001
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• Grade Level: High School

... it is clear that all the salt has dissolved I will place the electrodes into the solution, spaced apart at 5cm. When they are in place, I will read the ammeter to measure the current flowing between the electrodes and record them in a table. I will repeat this with all the different amounts of NaCl and then repeat the entire process again 3 times. This ... is kept to a minimum and the results are accurate. Another method to do this experiment could be to measure the amount of hydrogen gas given off and how quickly. For example, how much gas is given off in 1 minute or how long it takes ...

• Word Count: 989
• Approx Pages: 4
• Grade Level: High School

... the total energy supplied is turned into light and how much is turned into heat, hence find the percentage efficiency of the bulb. It would be very difficult for me to measure how much light the bulb is giving off so I have decided to measure the heat produced. I can then deduct this figure from the total energy supplied to give me the figure ... for the energy used to create the light. By dividing this number by the total energy supplied and then multiplying the figure by 100 I will have the percentage efficiency of the bulb. I hope to measure the amount of energy converted to heat by ...

• Word Count: 1233
• Approx Pages: 5
• Grade Level: High School

... check that all my pieces of magnesium are 2cm long or it will not be a fair test. The second thing I have to do is to measure 20cm2 of hydrochloric acid in to a beaker, and then I need to add the magnesium to the beaker, and then start the stop clock and then ... stop the stop clock when all the magnesium has disappeared. Then I will repeat the above steps for each of the different concentrations. Explaining My Prediction: The collision theory is when particles must collide, and must collide with enough force to make a ... experiment, I will have to correct all those possible errors I h...

• Word Count: 1211
• Approx Pages: 5
• Grade Level: High School

... that the more you wrap the nail with the coil the electromagnet would get stronger. I will change the number of volts from ranges of 1.5V, 3.0V, 4.5V, 6V, and I will measure the amount of iron filings that are attracted to the electromagnet. To make the test fair I would do the test more than once, keep the same amount of turns on ... the coil for each experiments and I would keep the same size of the U shaped metal. For this experiment you will need: - U shaped metal - 1-2 Coil of insulated wire - Battery - Iron Filings - 2 Crocodile Clips - 2 pieces of A4 paper - 2 Jumper wires My met...

• Word Count: 684
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... a 250ml solution using distilled water. 4. Transfer this solution into the 50ml burette 5. Shake the volumetric flask thoroughly to make sure the solution is homogeneous. 6. With the aid of a 25ml pipette measure out exactly 25ml of the 0.1M NaOH and transfer it into a clean conical flask. 7. Add 2-3 drops of Phenolphthalein indicator. 8. Titrate the solution until the indictor color changes from purple to ... (COOH) ©u H ©uO • 2 I.e. no. of moles of NaOH = ((0.001275 • 2) •1000)/25 = .102 moles After analyzing the results we can use our answers to figure out the percentage erro...

• Word Count: 1030
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• Grade Level: High School

... of reaction depends on the type of molecules which are combining. We conducted an experiment to test the rate of reaction when Mg is added to Hcl (aq). The Formulae for this reaction is 2Hcl (aq) + Mg = MgCl2 + H2. To set off a reaction you need the reactants. Reactants are the starting materials in a chemical reaction. The reactants in the reaction above ... new bonds are formed in the product. An example of an Endothermic Reaction previously investigated is ammonium nitrate plus water. We used a thermometer before we carried out the experiment to measure the temperature which was 18 d...

• Word Count: 420
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• Grade Level: High School

... . They could've also come form-fishing activities that let them be transported over land this could be hard, knowing that mussels aren't able to live out of the water for long periods of time. (Richerson, 4) The quagga mussel is originally from the Dneiper River drainage of Ukraine. It was first seen at the great lakes in September 1989. The first ... . We looked to the physical differences in each set of the shells. We then measured them and took down the measurements of each set. We used the millimeter scale to measure them and we made sure we measured then from the furthest edge to the...

• Word Count: 600
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• Grade Level: High School

... a physicist of Coulomb's law through comparative analysis of electrostatic force, potential, and capacitance. We completed this goal by using a torsion balance to measure the properties of such an event. We then completed the analysis to find that after making linear and angular measurements of the separation, that the ... . Next we touched each sphere with the charged probe, in turn giving the spheres a charge as well. We then used these charged spheres for readings by moving sphere b to the 10 cm mark of the scale and then balanced the angle of sphere a before the charge wore off ... C...

• Word Count: 1297
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• Grade Level: High School

... are four main factors that affect the strength and size of this field: Current/voltage Number of coils Size and shape of core Material of core (iron being the strongest) For example: two coils wrapped around the iron core would induce twice the strength of one coil. By this I mean that each coil will have twice the strength of one coil ... filings that drop off will be weighed. I will vary only the current in this experiment. All other factors will be kept constant. I will measure the amount of iron filings at 1,2,3,4 & 5 amps. I will repeat each experiment three times for accuracy. Saf...

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• Grade Level: High School

... and will not be included in this study. Materials The main materials necessary for this project besides participants are commercial chocolate and a sufficient method for psychological assessment of short-term memory. The participants in the experimental group would be required to fully consume the chocolate. I would measure the affects that the consumption of chocolate may have on short-term memory by ... comparing a control group ( group that does not receive chocolate before taking the test) and the experimental group (group that receives chocolate before the test is given). I would m...

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... divided by current. Resistance is measured in "Ohm's-. This is the result of Ohm's law, which is V = I/R. This means that for a certain circuit there will be a greater voltage across the wire if it has more resistance. All conductors of electricity have a certain amount ... the diagram above. I will have a metre rule with a wire attached to it. I have chosen a metre rule because I can then measure to the nearest millimetre. This will make the experiment easier as I will not have to keep holding onto the wire whilst putting the crocodile clips ... for this may be that I did not pay suffi...

• Word Count: 1316
• Approx Pages: 5
• Grade Level: High School

... dealt with the charging and discharging of capacitors. We setup the circuit as seen in Figure 1a with S1 being open in order to measure the time constant for discharging capacitors. The power supply(30V) was connected across C2(terminals P4 and P5) and also connected was the electrometer-voltmeter across the ... measured as the same procedure as in step 1 above. In part B of this experiment we were to do steps 4 and 5 which was to measure the series and parallel combination of capacitors. In part 4 of the experiment S1 was set at open and the circuit was arranged so that the capacitors...

• Word Count: 814
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• Grade Level: High School

... the test tubes they each will be labelled. The potato pieces will then be placed in the different test tubes and then left for one day for osmosis to fully take place and be stored in a dry place by the teacher. Then the potato pieces will be removed, the ... Firstly I can see that the correlation of my graph has a high and strong negative correlation, meaning that as the concentration increased the change in millimetre for the potato decreases. This is because when the concentration is increased osmosis in a high concentration of water the amount of solute (e.g. sugar) is low. ... the...

• Word Count: 4803
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• Grade Level: High School

... collide with the atoms within the wire. These collisions slow down the flow of the electrons, causing resistance. Resistance is a measure of how hard it is for the electrons to flow through a circuit. In this particular case we are measuring how the resistance of a piece of wire ... temperature will be my constant, remaining the same throughout my investigation. The temperature cannot be investigated because it will be difficult to control and measure it without the proper apparatus. • Length Of Wire: the longer the wire, the higher the resistance. This is because there are ... 60, 75...

• Word Count: 1925
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• Grade Level: High School

... was manipulated. It is crucial to only test one variable, otherwise, the researcher is unable to tell which variable was responsible for the change. To begin the experiment, the researcher must make sure the control exhibits conditions that are normal for everyday driving. The experiment should not be conducted on an open road, but rather on a closed driving course to limit the ... . Other stimuli would add more distractions and the data would come back invalid because the cell phone couldn't be concluded as being the distraction, and this experiment's intentions are to measure the use o...

• Word Count: 647
• Approx Pages: 3
• Grade Level: Undergraduate

Introduction: The purpose of the following experiment is to measure oxygen consumption and dye reduction in germinating barley and corn seeds at three different temperatures (Anderson, John N, pg. 6). Oxygen consumption can be measured through a ... pathway that occurs by using organic compounds. These compounds are broken down slowly so that the energy is not used up all at once for heat. The fuel used mostly for energy is glucose or what most know as sugar. Glucose is an exergonic substance, which means the chemical process it goes through actually stores ... given off actually becomes tra...

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... will give off more heat than the safety flame no matter how far the gas tap is on. Apparatus Bunsen burner - this is the main equipment for this experiment and will also be the heating implement. Tripod and Gauze - this will be used so that the beaker can be heated from underneath whilst ... we are heating. Thermometer - this will be used so we can measure the temperature while we are experimenting with the heat. Heatproof mat - this will be used so you do not burn the bench incase of an accident. Safety glasses - necessary for all experiments using Bunsen burners etc to protect your eyes...

• Word Count: 1052
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• Grade Level: High School

... certain things become an obstacle on his way to success: Although he was born a rather ordinary child to rather ordinary parents, he achieved a measure of success in his life through hard work. Franklin was born in 1706, the youngest son of Josiah Franklin, a soap and candle maker. ... was apprenticed into the printing trade under his older brother James. Franklin did not like and enjoy his brother's supervision, and left to work for a printer in Philadelphia after a few years. On the other hand, he continued his electricity experiments resulted in discovering lightening rod. He became ....

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