1. Compared to gasoline, hydrogen has(A) higher energy density per unit volume and per unit mass(B) higher energy density per unit volume but lower energy density per unit massdensity per unit mass(C) lower energy density per unit volume but higher energy(D) lower energy density per unit volume and per unit mass2. A new hydroelectric power plant proposed for the Mississippi River near St. Louisis advertised as "delivering 438,000 megawatt-hours of renewable electricity to theregion annually". What is the average power output of the plant?(A) 50 MW(B) 1.2 GW(C) 438 GW(D) 438 MW3. A car accelerates from 0 to 60 miles/hour in 6 seconds. What is a good estimateof the power output of the engine?(A) the mass of the car divided by 60 miles(B) the chemical energy of the gasoline consumed during the acceleration(C) the thermal energy produced by the engine during the acceleration(D) the final kinetic energy of the car divided by 6 seconds

1. (D) lower energy density per unit volume and per unit massHydrogen has a lower energy density…

1. Compared to gasoline, hydrogen has (A) higher energy density per unit volume and per unit mass (B) higher energy density per unit volume but lower energy density per unit mass (C) lower energy density per unit volume but higher energy density per unit mass (D) lower energy density per unit volume and per unit mass

1. Compared to gasoline, hydrogen has (A) higher energy density per unit volume and per unit mass (B) higher energy density per unit volume but lower energy density per unit mass (C) lower energy density per unit volume but higher energy density per unit mass (D) lower energy density per unit volume and per unit mass

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

4. The discussion of electricity costs in section 8.6 stated that coal costs of $1.00 - $1.50 per million BTU are equivalent to about $24-$36 per ton, and that natural gas costs of $2.00 - $5.00 per million BTU correspond, on an equivalent energy basis, to $12-$30 per barrel of oil. Use the data on fuel properties in table 8.1 to confirm these equivalencies.
Energy storage technology analysis: Analysis different energy storage technologies, such as batteries, flywheels or compressed air, to evaluate their suitabilty for different energy systems and applications.
In a cylinder of an automobile engine, immediately after combustion the gas is confined to a volume of 53.0 cm³ and has an initial pressure of 3.60 × 106 Pa. The piston moves outward to a final volume of 300 cm³, and the gas expands without energy transfer by heat. (Assume the gas in the engine is diatomic with y 1.40.) (a) What is the final pressure of the gas (in kPa)? = 317.920813906 kPa (b) How much work is done by the gas in expanding (in J)? 238.559389571 J (c) What If? If the engine operates in an ideal Otto cycle and 0.0125 mol of fuel-air mixture is injected into the cylinder during the intake stroke, what are the temperatures (in K) at points A, B, C, and D of the cycle as shown in the figure? P TA TC Adiabatic C processes ΤΑ A B TB То Тр = = = || B V V2 V₁ K K K K K
* Your answer is incorrect. A piston-cylinder assembly contains 0.7 lb of propane. The propane expands from an initial state where p₁ = 60 lbf/in.² and T₁ = 70°F to a final state where p₂ = 10 lbf/in.² During the process, the pressure and specific volume are related by pv² = constant. Determine the energy transfer by work, in Btu. W = i 3.123 Btu
Helium expands polytropically through a gas turbine according to the process PV^1.484 = C. If the turbine produces 29.25 MW, determine the heat transferred in kJ/s.
As a patent attorney you are asked to verify if a certain patent application should be approved, which means whatever is being patented must be possible/practical to build and work. The patent presents a new power plant designed to use a fuel capable of achieving a maximum temperature of 550 degrees F. The fluid flowing in the power plant system is to be cooled by a lake with temperature equal to 85 degrees F. The patent application indicates the power plant to be capable of achieving 0.78 thermal efficiency. Should this patent application be approved based on the information available? Why?
a) In a simple experiment, a solid with a diameter 3 mm and density 1500 kg/m3is released from a tall tower containing air at 25 oC and 1 atm. The inside diameter of the column is 0.15 m. The density of the air is assumed to be 1.2 kg/m3. List all your assumptions and estimate the minimum height of the tower to make sure the particle reaches its terminal velocity before it hits the bottom of the tower. b) In another experiment, 5 kg of the solid particles are to be fluidized with air at 1 atm and 25 oC. The diameter and density of the particles are 3 mm and 95 kg/m3, respectively.Using the Ergun Equation, determine whether the flow of the air is laminar orturbulent. List all your assumptions.
Helium expands polytropically through a gas turbine according to the process PV^1.327=C. If the turbine produces 30.46 MW, determine the heat transferred in kJ/s.
1. A 6-cylinder, 4-stroke marine diesel engine generally operates at 3000 revolutions per minute with a fuel consumption of 650 liters at 299 Kelvins with 28°API gravity units. Determine the density of the fuel and the amount of fuel consumed per hour in kilograms.
During a steady flow process, the pressure of the working substance drops from 180 psia to 30 psia, the speed increases from 210 fps to 1050 fps, the internal energy of the open system decreases 30 Btu/lb, ad the specific volume increases from 2 to 10ft^3/lb.Heat loss is 20 Btu/lb. Determine the horsepower for 12 lb/min mass flow. Ans. 66hp
7. Gaseous CO2 is contained in a vertical piston–cylinder assembly by a piston of mass 50 kg and having a face area of 0.01 m2. The mass of the CO2 is 4 g. The CO2 initially occupies a volume of 0.005 m3 and has a specific internal energy of 657 kJ/kg. The atmosphere exerts a pressure of 100 kPa on the top of the piston. Heat transfer in the amount of 1.95 kJ occurs slowly from the CO2 to the surroundings, and the volume of the CO2 decreases to 0.0025 m3. Friction between the piston and the cylinder wall can be neglected. The local acceleration of gravity is 9.81 m/s2. For the CO2 determine (a) the pressure, in kPa, and (b) the final specific internal energy, in kJ/kg.
* Your answer is incorrect. A gas undergoes a process in a piston-cylinder assembly during which the pressure-specific volume relation is pv¹.2 = constant. The mass of the gas is 0.4 lb and the following data are known: p₁ = 160 lbf/in.², V₁ = 1 ft³, and p2 = 300 lbf/in.² During the process, heat transfer from the gas is 2.1 Btu. Kinetic and potential energy effects are negligible. Determine the change in specific internal energy of the gas, in Btu/lb. Δu = i | 76.53 Btu/lb