Heat engines take input energy in the form of heat, use some of that energy to...
Heat engines take input energy in the form of heat, use some of that energy to do work, and exhaust the remainder. Similarly, a person can be viewed as a heat engine that takes an input of internal energy, uses some of it to do work, and gives off the rest as heat. Suppose a trained athlete can function as a heat engine with an efficiency of 0.15. (a) What is the magnitude of the internal energy that the athlete uses in order to do 8.3x104 J of work? (b) Determine the magnitude of the heat the athlete gives off.
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Heat engines take input energy in the form of heat, use some of
that energy to...
help please Chapter 15, Problem 045 Heat engines take input energy in the form of heat,...
help please
Chapter 15, Problem 045 Heat engines take input energy in the form of heat, use some of that energy to do work, and exhaust the remainder. Similarly, a person can be viewed as a heat engine that takes an input of internal energy, uses some of it to do work, and gives off the rest as heat.. Suppose a trained athlete can function as a heat engine with an efficiency of 0.12. (a) What is the magnitude of...
1a. Engine (1) has an efficiency of 0.12 and requires 5490 J of input heat to perform...
1a. Engine (1) has an efficiency of 0.12 and requires 5490 J of input heat to perform a certain amount of work. Engine (2) has an efficiency of 0.28 and performs the same amount of work. How much input heat does the second engine require? b. An ideal heat engine takes in heat from a reservoir at 320 °C and has an efficiency of 28%. If the exhaust temperature does not vary and the efficiency is increased to 43%, what would...
(heat engines) Let us propose that we use geothermal energy to drive a heat engine. Let...
(heat engines) Let us propose that we use geothermal energy to drive a heat engine. Let us also assume that we find a geothermal well under the Pacific not too far off shore. We are going to extract hot water from the well (at 940 C) and expel the waste heat at the ocean's surface (at an average constant temperature of 14° C.) a) What is the maximum possible efficiency of a heat engine operating between these two temperatures? b)...
11) In an electric power plant (a heat engine) energy as heat is input at a...
11) In an electric power plant (a heat engine) energy as heat is input at a temperature of Ty and exhaust heat is output at a temperature of Tc. This heat engine has an efficiency that is 55% (0.55 times) that of an ideal engine operating between these same temperatures. If the maximum waste heat that can be output at Tc is Qout Joules per second (Watts), what is the maximum Work (electrical output) that can be provided by the...
Six new prototypes for internal-combustion engines are tested in the laboratory. For each engine, the heat...
Six new prototypes for internal-combustion engines are tested in the laboratory. For each engine, the heat energy input and output per cycle, and the designed number of cycles per second are measured. Rank these engines on the basis of the work they perform per cycle. Rank from largest to smallest. To rank items as equivalent, overlap them.
Learning Goal: To understand what a heat engine is and its theoretical limitations. Ever since Hero...
Learning Goal:
To understand what a heat engine is and its theoretical
limitations.
Ever since Hero demonstrated a crude steam turbine in ancient
Greece, humans have dreamed of converting heat into work. If a fire
can boil a pot and make the lid jump up and down, why can't heat be
made to do useful work?
A heat engine is a device designed to convert heat into work.
The heat engines we will study will be cyclic: The working
substance...
A Carnot engine takes 2000 J of heat from a reservoir at 500 K, does some...
A Carnot engine takes 2000 J of heat from a reservoir at 500 K, does some work, and discards some heat to a reservoir at 350 K. How much work does it do, how much heat is discarded, and what is its efficiency?
Please show work for A 1-4! 1. Heat engines A heat engine is a device that...
Please show work for A 1-4!
1. Heat engines A heat engine is a device that does work by exchanging thermal energy with its environment. All heat engines operate in cycles during which a system, also known as the working substance, passes through a series of thermodynamic processes returning repeatedly to each state. A. Device 1, shown at right, represents a heat engine operating between 900 K reservoirs at 900 K and 400 K. (The system interacting with the reservoirs...
1. What are the similarity and difference between internal energy and enthalpy? 2. Can we measure...
1. What are the similarity and difference between internal energy and enthalpy? 2. Can we measure the total enthalpy of a system directly? Please give your methods, a) if yes, how to measure; b) if no, what methods can be used to measure its change? Question #1: Can we open a refrigerator in our house to cool the room down? And Why? Question #2: Can we use °C unit for temperature here? Question #3: How do you increase the thermal...
11) In an electric power plant (a heat engine) energy as heat is input at a...
11) In an electric power plant (a heat engine) energy as heat is input at a temperature of Ty and exhaust heat is output at a temperature of Tc. This heat engine has an efficiency that is 55% (0.55 times) that of an ideal engine operating between these same temperatures. If the maximum waste heat that can be output at Tc is Qout Joules per second (Watts), what is the maximum Work (electrical output) that can be provided by the...
help please
Chapter 15, Problem 045 Heat engines take input energy in the form of heat, use some of that energy to do work, and exhaust the remainder. Similarly, a person can be viewed as a heat engine that takes an input of internal energy, uses some of it to do work, and gives off the rest as heat.. Suppose a trained athlete can function as a heat engine with an efficiency of 0.12. (a) What is the magnitude of...
(heat engines) Let us propose that we use geothermal energy to drive a heat engine. Let us also assume that we find a geothermal well under the Pacific not too far off shore. We are going to extract hot water from the well (at 940 C) and expel the waste heat at the ocean's surface (at an average constant temperature of 14° C.) a) What is the maximum possible efficiency of a heat engine operating between these two temperatures? b)...
11) In an electric power plant (a heat engine) energy as heat is input at a temperature of Ty and exhaust heat is output at a temperature of Tc. This heat engine has an efficiency that is 55% (0.55 times) that of an ideal engine operating between these same temperatures. If the maximum waste heat that can be output at Tc is Qout Joules per second (Watts), what is the maximum Work (electrical output) that can be provided by the...
Six new prototypes for internal-combustion engines are tested in the laboratory. For each engine, the heat energy input and output per cycle, and the designed number of cycles per second are measured. Rank these engines on the basis of the work they perform per cycle. Rank from largest to smallest. To rank items as equivalent, overlap them.
Learning Goal:
To understand what a heat engine is and its theoretical
limitations.
Ever since Hero demonstrated a crude steam turbine in ancient
Greece, humans have dreamed of converting heat into work. If a fire
can boil a pot and make the lid jump up and down, why can't heat be
made to do useful work?
A heat engine is a device designed to convert heat into work.
The heat engines we will study will be cyclic: The working
substance...
A Carnot engine takes 2000 J of heat from a reservoir at 500 K, does some work, and discards some heat to a reservoir at 350 K. How much work does it do, how much heat is discarded, and what is its efficiency?
Please show work for A 1-4!
1. Heat engines A heat engine is a device that does work by exchanging thermal energy with its environment. All heat engines operate in cycles during which a system, also known as the working substance, passes through a series of thermodynamic processes returning repeatedly to each state. A. Device 1, shown at right, represents a heat engine operating between 900 K reservoirs at 900 K and 400 K. (The system interacting with the reservoirs...
1. What are the similarity and difference between internal energy and enthalpy? 2. Can we measure the total enthalpy of a system directly? Please give your methods, a) if yes, how to measure; b) if no, what methods can be used to measure its change? Question #1: Can we open a refrigerator in our house to cool the room down? And Why? Question #2: Can we use °C unit for temperature here? Question #3: How do you increase the thermal...
11) In an electric power plant (a heat engine) energy as heat is input at a temperature of Ty and exhaust heat is output at a temperature of Tc. This heat engine has an efficiency that is 55% (0.55 times) that of an ideal engine operating between these same temperatures. If the maximum waste heat that can be output at Tc is Qout Joules per second (Watts), what is the maximum Work (electrical output) that can be provided by the...
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