A hair dryer is basically a duct in which a few layers of electric resistors are placed. A small fan pulls the air and forces it through the resistors where it is heated. Air enters a 1200 W hair dryer with a density of 1.19 kg/m³. The rise in internal energy is 17.96 kj/kg. The cross sectional area of the hair dryer at the exit is 60 cm². neglecting the power consumed by the fan and heat losses through the walls of the hair dryer. Determine (a) volume flow rate air at the inlet (b) velocity of the air at the exit.

Q: An oll pump is drawing 18 kW of electric power while pumping oil with density 860 kg/m³ at a rate of…

A: Here, given data power(We)=18kWdensity(ρ)=860kg/m3flow rate(Q)=0.1…

Q: A fluid enters a machine at 162.8 m/s, 783.45 kPa, and with a specific volume of 0.463 m°/kg. The…

A:

Q: Consider a car that gets 35 mpg on high-rolling-resistance tires and is driven 15,000 miles per…

A: Given that:The car on high rolling resistance tires gives (fuel economy) is E=35 mpgThe fuel cost is…

Q: Consider a pumped hydro system that is used for energy storage. During off-peak hours, excess…

A: Given: The height of reservoir, H = 100 m The flow rate, Q = 650 ltr/s The power, P = 1000 MWh The…

Q: A fluid enters a machine at 169.56 m/s, 767.78 kPa, and with a specific volume of 0.103 m^3/kg. The…

A: GIVEN DATA AT INLET C1 = 169.56 m/s P1=767.78 KPa v1=0.103 m3/kg Heat Loss Q=20.9 KJ/kg At Outlet…

Q: The demand for electric power is usually much higher during the day than it is at night, and utility…

A: ρ = 1000 kg/m³ (density of water)g = 9.81 m/s² (acceleration due to gravity)Nighttime price =…

Q: When is work said to be done by a system. Is there any difference between work transfer and heat…

A: Work done is a way through which energy transfer occurs between the system  Energy is the ability or…

Q: A fluid enters a machine at 169.7 m/s, 874.09 kPa, and with a specific volume of 0.277 m³/kg. The…

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Q: A 60-kg person is carrying a 3-kg box walking (1) a ramp at a constant speed of 0.5 m/s. The ramp…

A: Given: To determine the work done by/to the box.

Q: To sterilize a 50.0-g glass baby bottle, we must raise its temperature from 15.5°C to 95.0°C. How…

A: The given values are - m = 50gm=501000kgC = 840 J/kg°C∆T = Change in temperature = 95 - 15.5°C =…

Q: The demand for electric power is usually much higher during the day than it is at night, and utility…

A: ρ = 1000 kg/m³ (density of water)g = 9.81 m/s² (acceleration due to gravity)Nighttime price =…

Q: A fan-cooled computer contains eight printed circuit boards, each dissipating 10 W of power. The…

A:

Q: A fluid enters a machine at 152.41 m/s, 838.17 kPa, and with a specific volume of 0.128 m3/kg. The…

A:

Q: Water is pumped from a lower reservoir to a higher reservoir by a pump that provides 20 kW of shaft…

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Q: TransPipe company is going to transport a flammable liquid. It is known that this liquid is being…

A: Giveninner diameter di=10mheta added Q=20kWspecific heat C=2.5kJ/kg Kdensity of the liquid…

Q: Consider a river flowing toward a lake at an average velocity of 3 m/s at a rate of 500 m³/s at a…

A:

Q: Air enters a compressor with a pressure of 14.5 psia, a temperature of 80°F, and a volumetric flow…

A: Given data: The inlet pressure of the compressor, P1= 14.5 psia The inlet temperature of the…

Q: When 100 kJ of work is done on a closed system during a process, the total energy of the system…

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Q: Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel.…

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Q: At a certain location, wind is blowing steadily at 9 m/s. Determine the mechanical energy of air per…

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Q: = Consider a person standing in a room at 23°C. Determine the total rate of heat transfer from this…

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Q: A room with dimensions of 3m*6m*8m is to be heated by a heater which supplies 30MJ of heat per hour.…

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Q: hp compressor in a facility that-75 operates at full load for 2500 h a year is powered by an…

A: Given data: motor efficiency = 93% = 0.93 No. of operating hours = 2500 h Motor power = 75 Hp Unit…

Q: A fluid enters a machine at 164.41 m/s, 889.14 kPa, and with a specific volume of 0.342 m³/kg. The…

A: Answer: The work done by the fluid is 1206.835 kJ.

Q: The average thermal conductivity of the walls (including windows) and roof of a house in the figure…

A: Given data: K = 4.8 ×10-4 kW/m.°C = 0.48 W/m.°C Average thickness, t = 22.8 cm = 0.228 m  Heat of…

Q: A rigid tank contains hot fluid that is cooled while being stirred by a paddle wheel. The internal…

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Q: The work done when a gas is compressed in a cylinder is 452 J. During this process, there is a heat…

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Q: Water is being heated in a closed vessel on top of a range while being stirred by a paddle wheel.…

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Q: A 10 hp fan is used in a room for circulation purposes. Assuming a sealed room. that is well…

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Q: A fluid enters a machine at 182.39 m/s, 804 kPa, and with a specific volume of 0.206 m3/kg. The…

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Q: Calculate the work done by a gas if it expands from volume 1m3 to 2m3 at constant atmospheric…

A: given data:-  inital volume = 1 m^3 final volume = 2 m^3 find the work done by a gas at atmospheric…

Q: The utility company is selling electric power for $0.06/kWh at night, and $0.13/kWh for power…

A: Calculate the power required for pumping operation. Pin=γQH+hLηp Here, Pin is the power required for…

Q: A fluid enters a machine at 161.96 m/s, 881.74 kPa, and with a specific volume of 0.174 m³/kg. The…

A:

Q: A hair dryer is basically a duct in which a few layers of electrical resistors are placed. A small…

A:

Q: The average thermal conductivity of the walls (including windows) and roof of a house in the figure…

A:

Q: The average thermal conductivity of the walls (including windows) and roof of a house in the figure…

A:

Q: Consider a refrigerator that consumes 400 W of electric power when it is running. If the…

A: The electricity cost of this refrigerator per month (30 days) is 69 rupees

Q: A well-insulated steam turbine receives 0.456 kg/s of steam at 34 m/s velocity and 3547.15 KJ/kg.…

A:

Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.