Physics Form 4 Chapter 3 - 4802 Words

Discuss your physics questions online at www.physics4spm.com 3 FORCES AND PRESSURE 3.1 UNDERSTANDING PRESSURE Pressure is force per unit area Pressure = Force Area P= F A 1. Define Pressure 2. State pressure’s formula 3. State relationship between pressure and area. 4. Describe applications involving High Pressure Increasing the pressure by reducing the area A sharp knife has a very The studs on a football small surface area on its boot have only a small cutting edge so that high area of contact with the pressure can be exerted ground. The pressure to cut the meat. under the studs is high enough for them to sink into the ground, which gives extra grip. The SI unit : Nm-2 = Pascal = Pa The pressure of a given force increases as the†¦show more content†¦1. Dam holds water at high altitude. The wall of the dam has to be thicker at the base. Explain. The wall of a dam is much thicker at the bottom than at the top because it must withstand the increased lateral pressure in depths of the water. 2. Water is stored in water tank at higher level. Why? Normally a water tank is placed at higher level so as to supply water at greater pressure. www.physics4spm.com 40 Discuss your physics questions online at www.physics4spm.com 3. Submarine is built with thick wall. Explain. Submarine is built with thick wall so as to withstand enormous pressure at greater depth. 4. A patient receiving intravenous drips of a certain fluid from a bottle. In order for the fluid to flow into the vein, the bottle must be placed at a height above the injection site. Why? The liquid solution is at a higher pressure so it has sufficient pressure to flow into the veins of the patient. 3.3 UNDERSTANDING GAS PRESSURE AND ATMOSPHERIC PRESSURE Explain gas pressure Gas pressure is the force per unit area exerted by the gas molecules as they collide with the walls of their container. Explain †¢ Atmospheric pressure is the pressure caused by the atmospheric weight of the air above us. pressure . †¢ Atmospheric pressure acts equally in all directions. †¢ Atmospheric pressure varies with the height of the object above sea level. It decreases with the altitude or the height above sea level. At higher altitudes,Show MoreRelatedQuantum Neural Network Essay1014 Words   |  5 PagesChapter 1 Quantum Neural Network 1.1 Introduction and Background The eld of articial neural networks (ANNs) draws its inspiration from the working of human brain and the way brain processes information. An ANN is a directed graph with highly interconnected nodes called neurons.Each edge of the graph has a weight associated with it to model the synaptic eciency. The training process involves updating the weights of the network in such a way that the network learns to solve the problemRead MoreThe Physics, Meaning, Lectures On Nature1712 Words   |  7 PagesThe physics, meaning â€Å"lectures on nature† written by Aristotle was a base towards Western science and philosophy genre books. His passion towards the topic of nature had led him to become more curious on general issues such as motion, causation, place and time. In Physics II.3 Aristotle’s provides a general understanding of the four causes, these four causes seem to apply to everything that would require an explanation. 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Page 3 2 – Theory †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦...... Page 3 3 – Experimental Procedure and Results †¦...†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦..†¦. Page 6 4 – Discussion †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.....†¦.†¦Ã¢â‚¬ ¦ Page 9 5 – Conclusion †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.....†¦Ã¢â‚¬ ¦.... Page 9 6 – Bibliography †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦......†¦ Page 10 1- Introduction The purpose of this experiment is to learn how use a variety of tools that will aid in the gatheringRead MoreCase Study Notes : The Case Of The Headless Corpse1576 Words   |  7 Pagesplease read:1. 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