bodily movement of the mass centre down the slope and rotational due to the wheel spin. Now the source of this energy is the loss in potential energy as the wheel moves down the slope. If it is reasonable to assume that friction effects are insignificant then no energy is lost. Thus the loss in potential energy becomes a gain in kinetic energy. Hence‚ Loss in potential energy = mgh‚ is equal to the (1) Gain in kinetic energy = 0.5mv2 + 0.5I 2 (2) where v = velocity of the mass centre down
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and acceleration of the object vs. time. It is observed in this ball toss experiment‚ at any point during the free fall period‚ the system contains the same total amount of mechanical energy. This amount is the sum of kinetic and gravitational potential energy. FREE FALL AND THE CONSERVATION OF ENERGY The law of conservation of energy states that the total amount of energy remains constant in an isolated system – energy can neither be created or destroyed‚ but can change from one form to another
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Hair cells for hearing and equilibrium 2. Gustatory receptor cells for taste 3. Photoreceptors for vision h. Generator Potential: when free nerve endings‚ encapsulated nerve endings and olfactory receptors reach threshold ‚ triggers one or more impulses in the 1st order sensory neuron. i. Receptor Potentials: created by separate cells j. Receptor cells that are grouped based on their location vii. Exteroreceptors: located at or near the surface
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revolution‚ the two anchors must be tilted at the correct angle. The principle of the pendulum bob is also applied here because the potential energy is expressed at max from the start and at the end of the swing of the two anchors while the kinetic energy is expressed at max while it is at the middle of the swing. B. Physics Concepts 1. Mechanical Energy a. Potential Energy – stored energy of the anchor b. Kinetic Energy – the anchor’s energy in motion 2. Force * the product
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agents produce‚ called fasciculation‚ are forceful enough to be seen. During the second phase‚ muscles stop responding to acetylcholine‚ proving that neuromuscular blockade is in effect. When depolarizing agents are used‚ they still prompt the action potential to occur; this means that the neurons will still send information. (Source) However‚ even though the neurons are still working‚ the depolarizing agent causes the effector site to become desensitized‚ allowing the block to be successful. In comparison
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CHAPTER 7 SIMPLE HARMONIC MOTION (SHM) 7.1 7.2 7.3 7.4 Simple Harmonic Motion (SHM) Kinematics of Simple Harmonic Motion Graph of Simple Harmonic Motion Period of Simple Harmonic Motion 7.1 Simple Harmonic Motion (SHM) 7.1 Simple Harmonic Motion (SHM) Learning Outcome : At the end of this topic‚ students should be able to: Explain SHM as a periodic motion without loss of energy Describe SHM according to the formula : d 2x a 2 x dt 2 7.1.1 SHM Simple harmonic
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surface of the ball harder. Raising the soccer ball to a higher position will increase its potential energy. As a soccer ball drops‚ the potential energy in the ball is converted into kinetic energy. Once the ball hits the ground‚ there will be a deformation of the shape of the ball and the kinetic energy will be converted into compressed potential energy. As the air decompresses‚ this potential energy is converted back into kinetic energy as the ball bounces upwards. The same thing
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structure of the center -surround in the receptive fields of retinal. In the receptive field‚ there are cone photoreceptors that communicate with On and Off center bipolar cell and finally On and Off center ganglion cells that carry the action potential to the cortex. When light comes to the retina (eyes) it causes closing of channels in the photoreceptor‚ there is no Ca2+ (calcium) influx‚ therefore‚ no neurotransmitter release (glutamate). While in the dark‚ is the opposite to light‚ channels
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Required Vocabulary – IB 12 Higher Level Physics and Physical Measurement 1. Fundamental Units – seven basic units of the SI measurement system: kilogram‚ second‚ mole‚ meter‚ ampere‚ Kelvin‚ candela. 2. Derived Units – units that are combinations of fundamental units. These combinations may or may not have a separate name. (eg. 1 kg m/s2 = 1 N) 3. Accuracy - An indication of how close a measurement is to the accepted value (a measure of correctness). 4. Precision - An indication
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ions vesticular membrane neurotransmitter e) vesicles f) closes g) action potential h) presynaptic membrane i) neurotransmitter is taken up 11. The Thymus plays a key role in training and development of T-Cells/T-Lymphocytes. 12. A toxin or other foreign substance that induces an immune response in the body. 13. Annies antigens will attack the antibodies‚ she will feel no muscle movement or action potential. The
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