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chemistry lab design
figure out the similarities between kinetic and potential energy
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Experimental Analysis: What is periodic motion? Periodic motion is when the pendulum repeats its movement for a period of time. The gravitational acceleration on Mars is 3.71 m/s2. If the pendulums were set in motion on the red planet, how would that affect their periods? The periods would increase. Was it necessary to displace the pendulums by the same degrees? Why or why not? It was necessary to displace the pendulums by the same degrees because they had different measurements. In a lab, you may only have one independent variable. Would changing the mass on the pendulum effect the period? (Hint: look at the formula for T) Changing the mass, (M) would affect the definitive answer because it is a variable in the formula for T. How …show more content…
(Hint: one’s the only force on a projectile and the other keeps things taut) The only two forces acting on the pendulum bob are gravitational and tension. Where is the kinetic energy greatest and where is the kinetic energy least? Kinetic energy is the greatest at its maximum displacement and kinetic energy is at its least at the peak. Where is the potential energy greatest and where is the potential energy least? Potential energy is the greatest at the peak and potential energy is at its least at its maximum displacement. When the potential energy is at a maximum, what is the kinetic energy? When potential energy is at a maximum, its kinetic energy is zero. How does the period of the energy graphs compare to the period of the displacement graph? How does the frequency compare? The period of the energy graphs is different to the period of the displacement graph. What is the general shape of the graphs? (Hint: Think trig) The general shape of the graphs are triangles. Imagine you have a pendulum of length 0.200 m that is displaced 38.0° from equilibrium. It is released from some height with no added velocity. What is the velocity of the bob at the equilibrium position? (Hint: steps to solve …show more content…
If percent error was under 10%, discuss steps you took to eliminate as much error as possible. Finally, write a sentence or 2 about improvements to lab design. Propose at least one way to make the experimental values equal to the theoretical values (how to eliminate flaws in the experimental design) ALWAYS, ALWAYS USE 3rd PERSON PASSIVE IN A LAB REPORT (if you can remember this in college, you’re ahead of the curve) The purpose of this lab was to find the potential and kinetic energy of the pendulum. The objective is to establish the relationship between pendulum length and periodicity. Also, to compare with experimental values. If the length of the bob increased, the period would be longer. The motion of the pendulum was analyzed using video tracking software. This helped by tracking the displacement vs. time and kinetic energy of the pendulum for each variable. The graph shows that kinetic energy is greatest when the pendulum is at the maximum of displacement for the origin point. Some errors in this lab were the inaccuracy of the measurements of the angles of the pendulum used. It was measured by the eye instead of by an actual
My hypothesis for this experiment is that the higher the levels of caffeine the water flea was exposed to, the quicker the heart rate would be.
In this experiment we positioned a marble ball on a wooden roller coaster positioned on a physics stand in the sixth hole. Throughout the experiment, we used an electronic timer to record the time of the marble where it passed through the light beam of its clamp. We positioned the clamp at a certain point on the roller coaster and measured the distance from the marble to the clamp; the height of the clamp; and finally the time the ball traveled through the clamp. After we recorded these different figures we calculated the speed of the marble from the given distance traveled and the time. We repeated the step 14 times, then proceeded to graph the speed and the height. Next, we took the measurements of position of the clamp, height, and speed and calculated the potential energy, the kinetic energy, and the total energy. Total energy calculated as mentioned before. Potential energy is taking the mass (m) which is 28.1g times gravity (g) which is 9.8 m/s2 times the height. Kinetic energy is one-half times the mass (m) times velocity (v2). Finally we graphed the calculated kinetic, potential, and total energies of this experiment.
As the time interval was changed between the shocks, the amplitude of the second CAP began to increase. This was seen when the time interval increased from 1.0 to 1.5. The compound action potential went from 0 to 0.1. The height (or maximum threshold) of the amplitude was seen at about 2.6. Once the time interval was increased past that point the compound action potential fell back down to zero. This was seen in the intervals of 8.0 to 9.0, where the amplitude is 0. To understand why these results were seen in relation to absolute, and relative refractory periods one should understand there definitions. The absolute refractory period, “is a time during which another stimulus given to the neuron (no matter how strong) will not lead to a second action potential” (PhysiologyWeb,2012). This period takes about 1 to 2 milliseconds, and it is a time when the sodium ion channels are inactive. The relative refractory period, “is a period during which a stronger than normal stimulus is needed in order to elicit an action potential”
1) I believe that my theoretical curves don’t really match like figure 4 but then again it somewhat does. My immigration curve and extinction curve do hit each other once, but not like in figure 4 where they hit each other twice. Also my extinction curve is going up like in figure 4 and my immigration curve is going down just like in figure 4. So I guess you could say that my curves represent the curves on figure 4.
To set up the experiment, a central force apparatus was calibrated and setup with a hanging
In conclusion the experiment was carried out and had great success proving my prediction to be correct and enabling solid and valid results which were able to be put in a graph. I believe my prediction could have been more accurate or more backed up if I had made a quantitative prediction. Though what I believed would happen did happen during the experiment which helped to understand the graph and the results which led me to be able to write a thorough report on them.
The higher the energy level in an energy source, the lower the wavelength of the energy produced, and the higher the frequency. Differences in wave energy characteristics are used to classify electromagnetic energy.
Displacement is an object or in this case a person’s change in position. Whereas when a ball is served, it has an average velocity and average acceleration. A hitter has many aspects they have to consider before attacking a ball. A hitter must observe the trajectory, speed, and placement of the set. The placement of the set is also an example of displacement. The set is moving from point A in the setter’s hands to point B where the hitter will attack the ball. When approaching a ball the hitter has kinetic energy but needs to possess potential energy. Kinetic energy is the energy of the hitter based on motion and is dependent on other objects. Potential energy is the energy of the hitter based on position. If the hitter possessed more potential energy, it will increase their vertical. A ball that has a lot of momentum is more difficult to pass. Momentum is an object with mass in motion. Momentum can be found by multiplying the mass of an object times its velocity.
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.
type of energy is lost or gained, and whether or not a factor that is
Poe, Edgar Allen. “The Pit and the Pendulum.” Poe, Edgar Allan. The Pit and the Pendulum. Mankato, Minn.: Creative Education, 1980. Print
They knew it was a pendulum-weight and didn’t think anything else of it. The people not told of the object's intended use used the pendulum-weight to hammer the nail into the wall. This is an example of reproductive thinking.
...ld also do this. Both of these suggestions would give a better average and reduce scatter. Most of these changes are not necessary as the procedure is quite reasonable. However a change in the apparatus could improve the experiment. For example more equipment.
Kinetic energy is the energy of motion. There are three forms of kinetic energy: vibrational, rotational, and translational. First, translational kinetic energy, the amount of translational kinetic energy that an object has depends upon two variables: the mass of the object and the speed of the object. Second, rotational kinetic energy, or angular kinetic energy, is kinetic energy. The rotation of an object is part of its total kinetic energy, looking at rotational energy separately around an object's axis of rotation. Vibrational kinetic energy is the kinetic energy an object because of