a bluetooth device operating at power class 1 (100mW) its transmit data every 10s. the data...
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bluetooth device operating at power class 1 (100mW) its transmit
data every 10s. the data...
1. A battery with a capacity of 2500 mAh (milliamp-hours) is used to power a device...
1. A battery with a capacity of 2500 mAh (milliamp-hours) is used to power a device that constantly draws 400 mA of current. Assuming that the battery is ideal, how long will the battery last? The same battery as above is now used to power a clock that only draws current when the second hand "ticks". The current draw during this movement is 2mA. A clock ticks every second but note that the second hand doesn't take a second to...
You have a number of 100MW oil-fired power plants. Supply a small island (population of 1...
You have a number of 100MW oil-fired power plants. Supply a small island (population of 1 million, some industry, some military) with electrical power. The average (day and night) use of electrical power is 0.5 kW/hour per person. 1.How many power plants would you need? 2. Where would you place them? 3. How would you distribute the power? 4. Can you assure 24 hour electrical power availability? What do you have to add to assure 24 hr electrical service? 5....
Question 1 of 2) A pully drive system is used to transmit power from a diesel...
Question 1 of 2) A pully drive system is used to transmit power from a diesel engine to a hydraulic pump. The diameter of the smaller pully is 5 (cm). ine diesel engine produces 9.9 (kW) of mechanical power at speed of 2100 (RPM) in its optimum operating point. ne hydraulic pump needs 110 (N.m) of torque to provide hydraulic gage pressure of 220 (bar) at efficiency of 75%. Calculate the followings: 1) Assuming that the diesel engine is running...
Problem 1 (10 points). Consider a newly invented power cyclic device performing a power cycle whi...
Problem 1 (10 points). Consider a newly invented power cyclic device performing a power cycle while interacting with two thermal reservoirs. The device absorbs 2000 kJ from the hight temperature reservoir at 1000 K, and releases certain amount of heat to the low temperature reservoir at 500 K. Now consider three claims on its thermal efficiency or per ormance: η 70, η 0%, and Y-40%. (a, 4 points) Formulate the entropy production for the cyclic process in terms of the...
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...
Please help and show work for 1-4! 900 K + 800 J 400] A. Device 1,...
Please help and show work for 1-4!
900 K + 800 J 400] A. Device 1, shown at right, represents a heat engine operating between reservoirs at 900 K and 400 K. (The system interacting with the reservoirs is represented by the dashed region.) The numbers and arrows indicate either thermal energy transfers or work done during each cycle. 1. How much work is done on the system during each cycle? Be sure to indicate whether it is positive or...
Figure P8.13 provides the steady-state operating data for a solar power plant that operates on a...
Figure P8.13 provides the steady-state operating data for a solar power plant that operates on a Rankine cycle with Refrigerant 134a as its working fluid. The turbine and pump operate adiabatically. The rate of energy imput to the collectors from solar radiation is 0.3 kw per square meter of collector surface area, with 60 percent of the solar input to the collectors absorbed by the refrigerant as it passes through the collectors. Determine the solar collector surface area, in square...
Homework 1 A rechargeable flashlight battery is capable of delivering 105 mA for about 15 h....
Homework 1 A rechargeable flashlight battery is capable of delivering 105 mA for about 15 h. How much charge can it release at that rate? If its terminals voltage is 1.1 V, how much energy can the battery deliver? I. 2. The current entering the positive terminal of a device is )- A and the voltage across the device is v)-5dildr V (a) Find the charge delivered to the device between t-0 and (b) Calculate the power absorbed. (c) Determine...
Fure shows a combined gas turbine vapor power plant operating of steady state. The gives data...
Fure shows a combined gas turbine vapor power plant operating of steady state. The gives data at these numbered states. The total ne power output is 45 MW and the mass flow 4 turbines numbered 1-5. The vapor parte numbered as the accompany rate of the water flowing through the vapour power plants 6 Air flows through the as turbine power plant, and the ideal gas made applies to the Stray heat transfer and the effects of motion and gravity...
1) A major function of an operating system is to implement system security and protection. List...
1) A major function of an operating system is to implement system security and protection. List three common techniques used by an operating system to achieve this function. 2) Assume that all programs spend 1/2 of their time waiting for I/O. a) If there is one program loaded in memory what fraction of time will the processor be busy? b) If there are two programs loaded in memory what fraction of time will the processor be busy? 3) Which technology...
1. A battery with a capacity of 2500 mAh (milliamp-hours) is used to power a device that constantly draws 400 mA of current. Assuming that the battery is ideal, how long will the battery last? The same battery as above is now used to power a clock that only draws current when the second hand "ticks". The current draw during this movement is 2mA. A clock ticks every second but note that the second hand doesn't take a second to...
Question 1 of 2) A pully drive system is used to transmit power from a diesel engine to a hydraulic pump. The diameter of the smaller pully is 5 (cm). ine diesel engine produces 9.9 (kW) of mechanical power at speed of 2100 (RPM) in its optimum operating point. ne hydraulic pump needs 110 (N.m) of torque to provide hydraulic gage pressure of 220 (bar) at efficiency of 75%. Calculate the followings: 1) Assuming that the diesel engine is running...
Problem 1 (10 points). Consider a newly invented power cyclic device performing a power cycle while interacting with two thermal reservoirs. The device absorbs 2000 kJ from the hight temperature reservoir at 1000 K, and releases certain amount of heat to the low temperature reservoir at 500 K. Now consider three claims on its thermal efficiency or per ormance: η 70, η 0%, and Y-40%. (a, 4 points) Formulate the entropy production for the cyclic process in terms of the...
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...
Please help and show work for 1-4!
900 K + 800 J 400] A. Device 1, shown at right, represents a heat engine operating between reservoirs at 900 K and 400 K. (The system interacting with the reservoirs is represented by the dashed region.) The numbers and arrows indicate either thermal energy transfers or work done during each cycle. 1. How much work is done on the system during each cycle? Be sure to indicate whether it is positive or...
Homework 1 A rechargeable flashlight battery is capable of delivering 105 mA for about 15 h. How much charge can it release at that rate? If its terminals voltage is 1.1 V, how much energy can the battery deliver? I. 2. The current entering the positive terminal of a device is )- A and the voltage across the device is v)-5dildr V (a) Find the charge delivered to the device between t-0 and (b) Calculate the power absorbed. (c) Determine...
Fure shows a combined gas turbine vapor power plant operating of steady state. The gives data at these numbered states. The total ne power output is 45 MW and the mass flow 4 turbines numbered 1-5. The vapor parte numbered as the accompany rate of the water flowing through the vapour power plants 6 Air flows through the as turbine power plant, and the ideal gas made applies to the Stray heat transfer and the effects of motion and gravity...
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