TABLE 1 *CRUMPLE ZONE: NON-CONTROLLED TRIAL | TRIAL | TIME(Sec) | DISTANCE(cm) | DISPLACEMENT(cm) | SPEED(m/s) | ACCELERATION=V-U/T | MAXIMUM VELOCITY(m/s) | ANGLE OF RAMP(Degrees) | MASS OF CAR(g) | GRAVITATIONAL POTENTIAL ENERGY(mgh) | KINETIC ENERGY(1/2mv2) | HEIGHT OF RAMP(cm) | 1 | 1.44 | 0.0149 | 0.0119 | 0.01035 | 0.574 | 0.826 | 20 | 226.22 | 0.1821 | 77.17 | 35 | 2 | 1.19 | 0.0153 | 0.0123 | 0.01286 | 0.869 | 1.034 | 25 | 226.22 | 0.2185 | 120.9 | 42 | 3 | 1.13 | 0.0158 | 0.0128
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62o Continued... b) Three +20 C charges are placed on a straight line‚ successive charges being 2 m apart as shown in Figure 2. Find (i) the potential energy of the three charge system (ii) the potential at point X (iii) the work done to bring a -10 μC from infinity to point X . Answer: i) 4.5 J‚ ii) 4.2x105 V‚ iii) -4.2x10 J Question 3 A 26 cm 36 cm
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kinetic energy. The kinetic energy of an object increases its speed. Ek = 1/2 mv2 is the work done of an object when the initial velocity‚ u is 0. Or Ek = 1/2 m (v2-u2) Potential Energy - The potential energy possessed by the object is the energy present in it by virtue of its position or
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screen with 1.0 volts? No a flat line was observed 2. What was the threshold voltage‚ or the voltage at which you first saw an action potential? 3.0 volts 3. How do the tracings generated with higher voltages compare to the one that was generated at the threshold voltage? The tracings traveled in the same fashion but had a higher peak of the action potential as you increased the threshold voltage 4. What reason can you give for the change? The increase in voltage creates the nerve to depolarize
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generate a constant negative voltage across membrane: the rmp - an AP abolishes the –ve rmp‚ making membrane potential transiently positive - we can record and measure ion currents using electrophysiology - hyperpolarization is usually the movement of +ve ions moving outward‚ but it can also be the movement of –ve ions moving inward; while depolarization is the opposite How do these membrane potentials arise? - electrical signals are generated through action of ion channels by opening and closing - the
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Part 1 Roller coasters Additional notes: GPE = m x g x h KE = m x v₂ The main energy transfers that happen as a car travels along the track from the start of the ride to the end: [1]The rollercoaster car gains gravitational potential energy (GPE) as it travels to the top. Once over the top‚ the car gains speed as GPE is transferred to kinetic energy (KE). As it travels to the top of another loop‚ KE is transferred to GPE. Not all the energy is transferred to or from GPE – some is transferred
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Signals Traveling in Neurons Two opposing ideas about the nervous system * Reticular theory ( the nervous system consisted of a large network of fused nerve cells) * Neuron theory ( the nervous system consisted of distinct elements or cells * Discovery of staining led to the acceptance of neuron theory. Staining is a chemical technique that caused nerve cells to become colored so they stood out from surrounding tissue * A way of electricity is transmitted in groups of neurons‚ such
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V. Analysis and Conclusion In this experiment we studied the elastic properties of the spring‚ the Hooke’s Law and the total work done on the spring when it is being stretch. Also‚ this experiment tackles the elasticity and deformation of a material that obeys the Hooke’s Law which states that “Within the elastic limit of a body‚ the deforming force is directly proportional to the elongation of the body.” Our experiment is to determine the force constant of the spring. The calculations used throughout
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this lab is to show how potential energy and kinetic energy is shown and transferred using a model rollercoaster. This lab also demonstrates the Law of Conservation of Energy. II.Introduction Potential and Kinetic energy have a very big relationship. The Law of Conservation of Energy states that “Energy cannot be destroyed or created‚ but can be transformed or transferred.” This lab will help demonstrate this law and show the conversion between Kinetic and Potential energy throughout the rollercoaster
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The Effects of Temperature on the Extracellular Firing Rate of Action Potentials in the Ventral Nerve Cord of the Periplaneta Americana Andrew Goldsmith (andrew.goldsmith@uconn.edu)‚ Tuesdays 1-4PM Section: 2 (Partner: Ana Charalambides) Abstract In polikiotherms it is known that the amount of locomotion varies based on the environmental temperature. We believe that this is caused by differences in the neural activity. We therefore investigated how temperature changes affect the extracellular
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