of mechanical energy; (2) To measure change in kinetic and potential energy as a ball moves in free fall; (3) And to determine power output when going up and downstairs. Theory Energy - It is one of the most important concepts in the world of science. It is the capacity of a physical system to do work (Jones). This experiment involves mechanical energy. Mechanical energy is the sum of kinetic energy (energy at motion) and potential energy (energy at rest). Work - It is
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height of 50.0cm from the motion detector to compare the graphs the it collected from the predicted graphs of the group . The results obtained from the experiment clearly demonstrated conservation of mechanical energy‚ the change in kinetic and potential energies as a ball moves in free fall and the power output when going up and downstairs. 1. Introduction Long ago‚ people used to trade by only exchanging products when the concept of ’money’ was yet to be introduced. Now we do know the concept
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ion has the greatest electrochemical gradient? _sodium______ d. The net movement of these two ions would do what to the cell? _depolarize__ e. This would be called an ____excitatory________ postsynaptic potential‚ or __epsp__________________. 3. a. An inhibitory postsynaptic potential (IPSP) causes a neuron to __hyperpolarize_________________. b. An example of a neurotransmitter that causes an IPSP is ___gaba___________. c. What type of ions move into the cell in response to this neurotransmitter
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determine the true relationship between the initial height of the ball and the final height of the ball. The formula to calculate gravitational potential energy is “G.P.E. = mass * gravitational force * height”. Therefore‚ increasing the height would result in a greater gravitational potential energy. However‚ under standard circumstances‚ the gravitational potential energy of the ball is converted to kinetic energy‚ while a minute amount of energy is converted into heat. Hence‚ the ball never approaches
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One Hundred and Fifty Questions 1. What two entities comprise a vector?-a vector is comprised of direction and magnitude. 2. What do you do with any vector that is not on either the x or y axis?-break it up into x and y components using trig‚ add up the components. 3. How are velocity and speed different?-velocity has a direction while speed does not. 4. What is the slope of the distance time graph? - Delta d/delta t. or distance over time. Rise over run. 5. What is
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working. The soma of a neuron is electrically charged reacting to electrical disturbances from either sensory or neighbouring neurons via it ’s dendrites. These brief changes of electrical voltage (action potentials) are conducted away from the soma and along the neurons axon. Action potentials travel quickly to the tip of the axon (synapse) where it stimulates the secretion of a particular neurotransmitter. The neurotransmitter acts as a chemical message able to bridge the fluid filled synaptic
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are some areas of improvement for your car? Explain how it could have been made better so that the car could have performed better. During its test‚ my mousetrap car curved to the right causing it to crash into a wall and stop short of its full potential. However‚ the car still traveled the the entirety of the 11 meters required for the maximum number of points. The reasons that my mousetrap car functioned as well as it did were: (1) the light and thin CD’s that I used as wheels minimized the friction
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11.1 Distance and Displacement Choosing a Frame of Reference The motion of an object looks different to observers in different frames of reference. EX: A passenger in the rear seat of a car moving at a steady speed is at rest relative to the front seat of the car. But is not at rest relative to: the side of the road‚ a pedestrian on the corner ahead‚ or even the rotating wheels of the car. EX: Examine the figure. If you were standing under the tree‚ which object would appear to be moving
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PSYCH STUDY GUIDE Neonatal Reflexes: Babinsk: big toe lifts‚ other toes fan out Moro Reflex: arms fling out and grab something when child feels like he’s falling Palmer Grasp: touch a baby’s palms and his hand closes Planter Grasp Sucking- doesn’t need to learn how to breast feed Rooting Withdrawal – reaction to pain Vigotsky’s Theory Focuses more on cultural impact on human development Believed children actively seek to discover new principles (like Piaget) Zone of proximal
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the slow development of skills through learning. “Its all in the genes”. Either you can do it with little effort‚ or you will never be able to do it‚ so you might as well give up in the face of difficulty. E.g. “ I can’t do maths” Untapped Potential theorists: These students believe that ability and success are due to learning‚ and learning requires time and effort. In the case of difficulty one must try harder‚ try another approach‚ or seek help etc. About 15% of students
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