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1111 ENGG 112 - THERMODYNAMICS QUESTION SHEET #2 – THERMODYNAMIC SYSTEMS This sheet involves topics covered in weeks 4 & 5. Before attempting these questions, you should work through Unit 2 in CANVAS. These questions are provided to allow you to evaluate your knowledge and understanding; hence, numerical answers are given but not solutions. A worked example is available in Unit 2, activity 2.10 and many more can be found in standard textbooks on thermodynamics'. The formula page at the end of this sheet will be provided in the examination. A new type of energy absorber is being designed as a buffer at the end of track at a fairground. It consists of a piston with small holes that moves in a cylinder containing oil, so that the kinetic energy of impact is absorbed as heat by the oil. (а) 1. Draw a sketch for the instant of impact by a vehicle of mass 2500kg moving at 30mph showing the forces and energy transfers involved. Write down the first law of thermodynamics for a system and identify terms that are not relevant if the oil is taken as the system. How much heat transfer to the surroundings is required to return the oil to its original temperature after an impact by a 2500kg vehicle moving at 30mph? (b) (c) [Answer: 225kJ]

1111 ENGG 112 - THERMODYNAMICS QUESTION SHEET #2 – THERMODYNAMIC SYSTEMS This sheet involves topics covered in weeks 4 & 5. Before attempting these questions, you should work through Unit 2 in CANVAS. These questions are provided to allow you to evaluate your knowledge and understanding; hence, numerical answers are given but not solutions. A worked example is available in Unit 2, activity 2.10 and many more can be found in standard textbooks on thermodynamics'. The formula page at the end of this sheet will be provided in the examination. A new type of energy absorber is being designed as a buffer at the end of track at a fairground. It consists of a piston with small holes that moves in a cylinder containing oil, so that the kinetic energy of impact is absorbed as heat by the oil. (а) 1. Draw a sketch for the instant of impact by a vehicle of mass 2500kg moving at 30mph showing the forces and energy transfers involved. Write down the first law of thermodynamics for a system and identify terms that are not relevant if the oil is taken as the system. How much heat transfer to the surroundings is required to return the oil to its original temperature after an impact by a 2500kg vehicle moving at 30mph? (b) (c) [Answer: 225kJ]

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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ENGG 112 – THERMODYNAMICS QUESTION SHEET #2 - THERMODYNAMIC SYSTEMS This sheet involves topics covered in weeks 4 & 5. Before attempting these questions, you should work through Unit 2 in CANVAS. These questions are provided to allow you to evaluate your knowledge and understanding; hence, numerical answers are given but not solutions. A worked example is available in Unit 2, activity 2.10 and many more can be found in standard textbooks on thermodynamics'. The formula page at the end of this sheet will be provided in the examination. A new type of energy absorber is being designed as a buffer at the end of track at a fairground. It consists of a piston with small holes that moves in a cylinder containing oil, so that the kinetic energy of impact is absorbed as heat by the oil. (a) 1. Draw a sketch for the instant of impact by a vehicle of mass 2500kg moving at 30mph showing the forces and energy transfers involved. Write down the first law of thermodynamics for a system and identify terms that are not relevant if the oil is taken as the system. How much heat transfer to the surroundings is required to return the oil to its original temperature after an impact by a 2500kg vehicle moving at 30mph? (b) (c) [Answer: 225kJ] sneed of 350 m/s lodges in a wood block of mass
Transcribed Image Text:ENGG 112 – THERMODYNAMICS QUESTION SHEET #2 - THERMODYNAMIC SYSTEMS This sheet involves topics covered in weeks 4 & 5. Before attempting these questions, you should work through Unit 2 in CANVAS. These questions are provided to allow you to evaluate your knowledge and understanding; hence, numerical answers are given but not solutions. A worked example is available in Unit 2, activity 2.10 and many more can be found in standard textbooks on thermodynamics'. The formula page at the end of this sheet will be provided in the examination. A new type of energy absorber is being designed as a buffer at the end of track at a fairground. It consists of a piston with small holes that moves in a cylinder containing oil, so that the kinetic energy of impact is absorbed as heat by the oil. (a) 1. Draw a sketch for the instant of impact by a vehicle of mass 2500kg moving at 30mph showing the forces and energy transfers involved. Write down the first law of thermodynamics for a system and identify terms that are not relevant if the oil is taken as the system. How much heat transfer to the surroundings is required to return the oil to its original temperature after an impact by a 2500kg vehicle moving at 30mph? (b) (c) [Answer: 225kJ] sneed of 350 m/s lodges in a wood block of mass
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