the incident angle. Refraction takes place at an interface due to the different velocities of the acoustic waves within the two materials. The velocity of sound in each material is determined by the material properties (elastic modulus and density) for that material. In the animation below‚ a series of plane waves are shown traveling in one material and entering a second material that has a higher acoustic velocity. Therefore‚ when the wave encounters the interface between these two materials‚ the
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possible in one direction. For the balloon’s velocity‚ if the balloon is moving rightwards‚ then the velocity is moving rightwards also. The amount of speed is the rate at which an object covers distance. A fast-moving object has a high speed and covers a large distance in a short amount of time. A slow-moving object that has a low speed will cover a small amount of distance in the same amount of time. The force that moves the balloon to create velocity is the thrust when you let go of the balloon’s
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bellmouth entry to the flow visualisation pipe. Flow through this pipe is regulated using a control valve at the discharge end. The water flow rate through the pipe can be measured using the volumetric tank (or measuring cylinder) of a Hydraulics Bench. Velocity of the water can therefore be determined to allow for the calculation of Reynolds’ number. A dye injection system is installed on top of the header tank so that flow pattern in the pipe can be visualised. In this experiment‚ we fix the time which
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Calculate the Change in Velocity Needed to Get to the Moon My specific area of focus is the translunar injection maneuver that propelled Apollo 13 on a trajectory towards the Moon’s sphere of influence. This part of the mission was crucial to the overall success of the mission. In order to reach the moon‚ the velocity of the spacecraft had to be increased just the right amount in order to exit a parking orbit around the Earth and reach the Moon. It is the calculation of this velocity that I will be focusing
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30 CHAPTER 5 TURBINES 5.1 Introduction Hydraulic turbines are the machines which use the energy of water and convert it to mechanical energy. The mechanical energy developed by a turbine is used in running an electric generator which is directly coupled to the shaft of the turbine. The electric generator thus develops electric power‚ which is known as hydro-electric power. 5.2 Elements of Hydraulic Power Plants Fig.5.1 General Layout of a Hydraulic Power Plant 31
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the simulation to see if it is possible to get more accurate results using grid convergence analysis. Method: The pipe used in the simulation has dimensions of a 0.5m axial length and a radial diameter of 12mm. The air entering the pipe‚ inlet velocity‚ is set to 0.4 m/s at a temperature of 25⁰C and one atmospheric pressure. No slip condition was set on the pipe walls. The outlet of pipe was set to zero gauge average static pressure. In CFX a mesh was formed on the pipe with a default mesh spacing
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an archer pulls back the string‚ he does work on the bow‚ and is converted to potential energy. Upon release of the arrow‚ this potential energy is converted into kinetic energy‚ most of which is transferred to the arrow and gives it its initial velocity. The force that the archer applies to the bow to bend it is actually the weight that he feels on his fingers as he pulls back the string. The archer feels a greater weight on his fingers as he pulls the string farther away from its resting position
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| Changing an object’s direction of motion without changing its speed | | Maintaining an object in uniform circular motion | | Changing an object from a state of rest to a state of motion | | Maintaining an object in motion at a constant velocity | 2.The force that accelerates a car on a level road is exerted by the | motor. | | gears. | | gasoline. | | road. | | tires. | 3.The frictional force‚ due to air resistance‚ acting on an object is always | in the upward direction
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Aim What are the features of the Wag water river and how they are formed due to erosion and deposition at each stage of the river? Discussion How tributaries cause the velocity to be greater? A tributary is a stream or river that flows into a main stem river or a lake. Velocity downstream increases when there are more streams feeding the main stream. The load of a river is the total amount of material carried or transported by a river. The bedload is the load transported along the bed of
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Physics HSC Notes Space 1. Earth has a gravitational field that exerts a force on objects both on it and around it. K1 Define weight as the force on an object due to a gravitational field. Mass is the amount of matter within an object‚ measured in kg Weight is the force of gravity acting on an object’s mass measured in newtons (N). Weight is a force thus a vector quantity. K2 Explain that a change in gravitational potential
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