Data Analysis The question being tested is,” Which fabric (cotton,silk, and polyester) will burn the fastest ?” The hypothesis was that the polyester would be the least fireproof out of the three. The independent variable of the entire experiment was the three different fabrics used which are silk , polyester, and cotton . The dependent variable was the amount of time . The most important procedures was step 5,7,9 the conducting of the experiment where you place the patch of the fabric on the stick leave it exposed for one minute to the fire and measuring the time with the stopwatch for the three fabrics. The experiment went mostly well. A couple mishaps did happen but the experimenting passed . To conduct this experiment it was quite a journey. The lighter did not work at first with the wind,but after that the experiment went well. The times appear to prove the hypothesis wrong but the facts help it a little . the averages make sense . there was not a discernible trend in all the data. The silk had a wave like trend with the first trial being the …show more content…
the moral of the data is to tell which fabric the most fireproof fabric. The data relates to the original hypothesis due to the fact that the polyester residue gives you 3rd degree burns and the silk goes up in a puff of smoke. The results make sense they all end up in between the three trials. The one extraneous variable was that the first two trials the lighter did not light due to the wind so the oil drum stove in the backyard was the place where the three trials were tested. The wind may have altered the results because the first two for polyester were longer than third clear sky and the cotton last longer on the windiest trial 2 than any of the three trials. The results may have happened due to the fact that the weather on the two days was different the first day was extremely windy while the other day was clear skies
My hypothesis for the penny cleaning with the chemicals experiment was accepted. The hypothesis was; “If a penny is placed in salt and vinegar, then it will get cleaner than the other chemicals being used”. The data used from the experiment that supports the hypothesis was that the salt and vinegar chemical cleaned a penny the best it had a 90 out of 100.
Possible sources of error in this experiment include the inaccuracy of measurements, as correct measurements are vital for the experiment.
The tennis ball is the constant variable factor (the variable that is kept the same, to make the investigation valid). The ball will dropped from increasing heights (cm-25, 50, 75,100,125,150,175,200) and the bounce of the ball will be measured. A sample size of 3 results will be taken from each height the ball is dropped. The same investigation will then be repeated, but one of the independent variables will be changed.
Going into details of the article, I realized that the necessary information needed to evaluate the experimental procedures were not included. However, when conducting an experiment, the independent and dependent variable are to be studied before giving a final conclusion.
This experiment was conducted to calculate the running movement and velocity of four people running in a straight line for 100 meters and compare them to the all-star Usain bolt. Usain bolt is the number one all-star ranking, the best and fastest runner ever. The things I could have improved on were that I didn’t really contribute that much to the experiment due to me being sick and non-present for the experiment itself. Things that I did well on were getting down all the results onto the Microsoft excel. The conclusions made from this experiment were that Usain blot is still faster than everyone else and the boys are still faster than the girls by a large amount.
The overall average of the control Daphnia’s heart rate is 249.38 bpm. 0.01% caffeine’s average is 327.93 bpm, and the caffeine at 0.005% has an average of 268.90 bpm, both making the heart rate speed up. Ethanol had the opposite affect, 0.01% ethanol’s average heart rate for this experiment is 159.58 bpm and 0.005% ethanol had an average of 183.4 bpm. Caffeine has a positive percent change while ethanol has a negative percent change in the data chart. The percent change for 0.01% caffeine is 31.50%change, for 0.005% of caffeine it is 7.83% change and for ethanol 0.01% it is 36.01% change while 0.005% ethanol has a 26.47% change. The standard deviation for the treatments all relatively close. Caffeine 0.01% had a standard deviation of 49.77, 0.005% caffeine’s standard deviation is 58.95. The standard deviation for 0.01% ethanol is 54.19, ethanol 0.005 had a standard deviation of 49.47, and the control groups is 33.31. The p-tests show if and how significant the data
In the analysis, the hypothesis was that pennies made before 1982 were made out of a different substance than the pennies made after 1982. The hypothesis turned out to be true. The pre 1982 pennies were made out of copper which has a density of 8.6 g/mL and the post 1982 pennies are made out of zinc which has a density of 7.14 g/mL. So it can concur that mass for pennies made before 1982 are higher than pennies made after 1982. Some errors were when calculating. The densities for the pennies and making the graphs. When making the graphs, it can be suspected that each graph is wrong could be wrong due to not adding enough data points or misplaced points. For the data tables , it can also be suspected that the density for each data table could
In this lab, we experimented how the incline of a ramp affects the acceleration of the toy car. In this experiment, we sent a toy car down 3 different ramps at 3 different heights. All 3 of the ramps had the same length of about 3.065 meters to ensure accurate data. We had to record The number of Trials, time, final time, distance, final distance, velocity, final velocity, and acceleration. In our lab the Independent variable was the height of the ramp and the Dependent variable is the Acceleration of the car when going down the ramp. With the small ramp, the average time moving down the ramp was 3.58 seconds. Then the average acceleration for the small ramp was .26 m/ss. That was the slowest time and acceleration out of all 3 slopes. Up second
In the future, the experiment can be improved by making sure that changes above, if required, are done before the first trial of the first run starts. Another problem was that the 3-step pulley moved slightly every time a trial was conducted. This could be prevented for the future labs by have a 3-step pulley that more resistible to movement. With these improvements, future laboratory might get more accurate results.
Identify the chosen research method (experimental, survey, observation or correlational research) and if appropriate, the design used. (1 mark) I am using a lab experiment as my research method. I am using an independent groups design. PB4: Identify the advantages(s) and disadvantage(s) of the chosen research method. (2 marks)
9 Pin the two pieces of fabric together, right sides facing, near the edge. The seam will go 1/2 inch (1.3 cm) to 5/8 inch (1.5 cm) from the edge. You can sew a single layer of fabric (and maybe do to stop an edge from fraying, say), but because the goal for most machine sewing is to join two pieces of fabric, one should get used to sew with a pair of bearings and pins.
...ore reliable if it were possible to do more trials to make sure that the data that was found was correct. This experiment could’ve been more reliable if some mistakes weren’t made like, the inaccuracy of weighing and measuring the potatoes. This could have affected the results by throwing off all the data and giving numbers that were nowhere near accurate. Another mistake that could’ve been made was the amount of solution put into each test tube. Some of the test tubes may have had to little or not enough of its solution. Some ways to fix both of these problems would be to weigh and measure each potato core more than once which is not what was done. A way to fix the inaccuracy of the amount of salt water put into each test tube would be to measure the solutions into a different container to make sure it’s an accurate measurement, then pouring it into the test tube.
...executed was on the AstroTurf outside the school. This could have affected the subject’s performance and how the results were measured. To improve this, the experiment should have been carried out in a science lab on a treadmill so that the environment is constant and so that the heart rates are easier to measure. Thirdly, the temperature of when the experiment took place was about 10°C which may have affected the subject’s performance. If this experiment were recurrent then 5 subjects would do it inside (room temp. 21°C) using the treadmills and wearing the right clothing, and another 5 would do it outside to see if this factor did in fact affect the results and cause them not to be as accurate as it could be. Then we would be able to compare the two temperatures. Overall this experiment ran smoothly with some problems, which can be improved as I explained above.
Independent variables: The temperature of hcl gas will be decreased and increased throughout the experiment.
There is also the potential of human error within this experiment for example finding the meniscus is important to get an accurate amount using the graduated pipettes and burettes. There is a possibility that at one point in the experiment a chemical was measured inaccurately affecting the results. To resolve this, the experiment should have been repeated three times.