3 Work‚ Power and Energy At the end of this section you should be able to: a. b. c. d. e. f. describe potential energy as energy due to position and derive potential energy as mgh describe kinetic energy as energy due to motion and derive kinetic energy as mv2/2 state conservation of energy laws and solve problems where energy is conserved define power as rate of energy transfer define couple‚ torque and calculate work done by variable force or torque solve problems where energy is lost due to friction
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Muscle Tissue 1. How is muscle tissue categorized? Muscle tissue is categorized by its shape‚ the number of nuclei‚ and the mechanism of stimulation. 2. a. Click the Smooth Muscle Tissue. Identify each of the following: Nucleus----- Smooth Fiber Muscle------------------ b. Describe smooth muscle control (voluntary or involuntary). Involuntary c. Name some smooth muscle functions (click the “Tissue Locations” button). Smooth
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addition of NaCl in the ECF elicit an action potential? With the addition of more Na ions it increases the concentration of Na ions outside the cell. The driving force of the action potential is the increase in the concentration gradient because of the increase of Na ions outside the cell. 4. General anesthetics such as ether and chloroform open K+ gated-channels in the brain. What would be the effect of inhaled ether on the generation of action potentials in neurons in the brain of a rat exposed
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Materials 2. Place the bunny turned in on itself on the ground (this enables the toy to launch itself upward by suction; elastic and potential energy). Do so 5 times 3. Measure the height traveled by the stopper using a meter stick per each trial. 4. Using the measurements and given formulas calculate the speed of the bunny on release using E(kinetic)=E(potential) III. Data table Trial Bunny Height (meters) 1. 1.29 2. 1.30 3. 1.32 4. 1.27 5. 1.31 Average 1.30 IV. Calculations: E(k)=E(p)
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Have you ever ridden on a rollercoaster and felt your heart drop as you were going downhill? Have you asked yourself how getting these feelings were possible? The answer is math. You may ask what math has to do with rollercoasters. Math is the reason for everything and anything that has to do with rollercoasters. Without math‚ it would be impossible to even be able to create one. To build a rollercoaster you need to be able to use numbers when talking about the costs‚ taking measurements‚ calculating
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are all traversed through the manipulation of its kinetic andpotential energy. For example‚ in most situations a roller coaster car will initially be pulled a large hill. As the suspense for the riders grows‚ so does the potential energy. Once at the top‚ the ride’s built up potential energy is turned into kinetic energy by the
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branch many times. One of the structures‚ however‚ is very thin and very long. This latter structure is most likely the neuron’s __________ ‚ which carries the __________. a. dendrite; efferent signal b. dendrite; afferent signal c. axon; action potential d. axon; receptors 2. If the myelin sheathing on neurons is absent or removed in a given individual‚ he or she will exhibit difficulties in speaking‚ vision‚ and balance because without myelin the a. quantity of neurotransmitters released into
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fires an impulse‚ called the action potential‚ down the axon. The impulse is protected and sped along its way by the myelin sheath‚ which is a layer of fatty tissue that surrounds the axon. Each neuron receives signals from many other neurons. Some signals are excitatory‚ and some are inhibitory. If the excitatory signals minus the inhibitory signals exceed a certain level‚ called the threshold‚ then the signals trigger an action potential. When the action potential reaches the axon terminals‚ called
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equipotential line and how is this simulation related to work and energy? 1) Turn on “Show Numbers” 2) Place a positive 1 nano-coulomb charge near the center of the screen. 3) In the lower left of the screen is a meter for indicating electric potential‚ in volts‚ created by the charge that you introduced. Record the voltage and turn on “Plot”. 3.7V 4) This line is much like a line on a geologic topo map. Explain the similarity. These two are sounded by the curve. 5) You are on
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equipotential line and how is this simulation related to work and energy? 1) Turn on “Show Numbers” 2) Place a positive 1 nano-coulomb charge near the center of the screen. 3) In the lower left of the screen is a meter for indicating electric potential‚ in volts‚ created by the charge that you introduced. Record the voltage and turn on “Plot”. 4) This line is much like a line on a geologic topo map. Explain the similarity. In a topo map it shows all the elevation points as a higher or lower
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