Homework Answers
Add Answer to:
QUESTION TWO Carbon steel balls (p 7833 kg/m3, k-54 W/m K, cp 0.465 kJ/kg.0C and a-1.474...
Problem 2: A stainless steel rod (k-21 W/m-K, p-8000 kg/m3, C,,-570 J/kg-K) with diameter D-10 mm is heat-treated as it...
Problem 2: A stainless steel rod (k-21 W/m-K, p-8000 kg/m3, C,,-570 J/kg-K) with diameter D-10 mm is heat-treated as it passes through a furnace at a speed of 2 cm/s. The furnace has a convection coefficient of 80 W/m2-K and an air temperature of 900°C. The furnace is 3 m long, and the stainless steel enters at 20°C. (a) Using a control volume of length S traveling with the rod, develop a differential equation for the rate of change of...
A long steel bar with a diameter of 4 cm (ρ = 7840 kg / m3...
A long steel bar with a diameter of 4 cm (ρ = 7840 kg / m3 , cp = 580 J / kg ° K, k = 52 W / mK, α = 1.21x10-5 m2 / s), internal enters the 2 m long moving belt heat treatment furnace at ambient temperature of 900 ° C at 40 ° C. Since the film coefficient in the oven is 100 W / m2K, the center axis temperature of the bar at the...
A long steel bar of radius R=2.5 cm, k =50 W/(m °C), p= 7800 kg/m), and...
A long steel bar of radius R=2.5 cm, k =50 W/(m °C), p= 7800 kg/m), and c = 0.5 kJ/(kg. . °C) is to be annealed by cooling slowly from 800.°C to 100.°C in an environment at temperature 50.°C. If the heat transfer coefficient between the environment and the surface of the bars is h = 45 W/(m .°C), determine the time required for the annealing process using lumped system analysis.
A silver sphere (k = 429 W/m.°C.p = 10,500 kg/m", Cp=0.235 kJ/kg-°C) is initially at 0°C....
A silver sphere (k = 429 W/m.°C.p = 10,500 kg/m", Cp=0.235 kJ/kg-°C) is initially at 0°C. The sphere diameter is 5 cm. Now the sphere is exposed to ambient air at 40°C on all of its surfaces with a heat transfer coefficient of 12 W/ m K. Determine approximately how long it will take for the temperature of sphere to rise to 25°C. Ot=80 min t=28 min O t = 120 min o t= 18 min
The wall of a furnace consists of two parts, a ceramic brick lining (k=1.1 W/m C,....
The wall of a furnace consists of two parts, a ceramic brick lining (k=1.1 W/m C,. l=20 mm) and an outer steel wall (k=50 W/ m C, l=10 mm). The inner heat transfer coefficient is 29 W/ m2 C and the outer heat transfer coefficient is 14 W/ m2 C. Taking the bulk temperature of the furnace to be 1000 C and the air temperature outside the furnace as 15 C calculate the temperature of the outer steel wall exposed...
Please help solve these parts. Thanks After leaving the furnace at temperature 900°C, steel balls of...
Please help solve these parts. Thanks
After leaving the furnace at temperature 900°C, steel balls of radius 1.5 cm are being placed in a moving belt of speed u=1 cm/s and cooled slowly in air (Too = 30°C, h = 100 W/m²K); these balls are then collected Furnace Air, 35°C after moving a distance of L = 4.5 m. Choose steel: ks = 900°C 50 = 0.465 kg.K Air: ka = 0.025 Pa = 1.2800 kg,ca = 0.718 k] The...
A sugar solution (? = 1,080 kg/m3, cp = 3,601 J/kg ? K, kf = 0.5764...
A sugar solution (? = 1,080 kg/m3, cp = 3,601 J/kg ? K, kf = 0.5764 W/m ? K, ? = 1.3 × 10-3N ? s/m2) flows at rate of 2 kg/s and is to be heated from 25°C to 50°C. Water at 95°C is available at a flow rate of 1.5 kg/s (cp = 4,004 J/kg ? K). Sugar solution flows through the annulus. Designing a double-pipe heat exchanger for this process is proposed. The following geometrical parameters are...
k=300 BRO p=2800 kg are m3 Aluminum Heat sinks of rectangular profile (k = 290 W...
k=300
BRO p=2800 kg are m3 Aluminum Heat sinks of rectangular profile (k = 290 W m-K c = 900 kg-K commonly used to remove heat from a surface whose temperature is Ts = 150°C. The temperature of the surrounding air is 20°C. The natural heat transfer coefficient associated with the surrounding air is h = 200 m2-K Determine the temperature distribution along a fin. W Alr Toogh 20 mm 3 5 150°C 90 mm Assumption: Steady State, Two-Dimensional Conduction...
W kg m-K m3 Two-Dimensional Steady and transient Conduction - Heat Sink Aluminum fins with triangle...
W kg m-K m3 Two-Dimensional Steady and transient Conduction - Heat Sink Aluminum fins with triangle profiles (k = 290 p = 2800 ,C= 900 shown in the accompanying figure, are used to remove heat from a surface kg-K whose temperature is T, = 150°C. The temperature of the surrounding air is 20°C. The natural heat transfer coefficient associated with the surrounding air is h = 190, Determine the temperature distribution along a fin. w m-K Air To, h 20...
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and...
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and a 2-kW baseboard electric resistance heater in the room is turned on and kept on for 15 min. The temperature rise of air at the end of 15 min is 2)An example of when it is appropriate to model a substance as an ideal gas is when a. The pressure and temperature are close to the critcal point b. The pressure and temperature are...
Problem 2: A stainless steel rod (k-21 W/m-K, p-8000 kg/m3, C,,-570 J/kg-K) with diameter D-10 mm is heat-treated as it passes through a furnace at a speed of 2 cm/s. The furnace has a convection coefficient of 80 W/m2-K and an air temperature of 900°C. The furnace is 3 m long, and the stainless steel enters at 20°C. (a) Using a control volume of length S traveling with the rod, develop a differential equation for the rate of change of...
A long steel bar of radius R=2.5 cm, k =50 W/(m °C), p= 7800 kg/m), and c = 0.5 kJ/(kg. . °C) is to be annealed by cooling slowly from 800.°C to 100.°C in an environment at temperature 50.°C. If the heat transfer coefficient between the environment and the surface of the bars is h = 45 W/(m .°C), determine the time required for the annealing process using lumped system analysis.
A silver sphere (k = 429 W/m.°C.p = 10,500 kg/m", Cp=0.235 kJ/kg-°C) is initially at 0°C. The sphere diameter is 5 cm. Now the sphere is exposed to ambient air at 40°C on all of its surfaces with a heat transfer coefficient of 12 W/ m K. Determine approximately how long it will take for the temperature of sphere to rise to 25°C. Ot=80 min t=28 min O t = 120 min o t= 18 min
Please help solve these parts. Thanks
After leaving the furnace at temperature 900°C, steel balls of radius 1.5 cm are being placed in a moving belt of speed u=1 cm/s and cooled slowly in air (Too = 30°C, h = 100 W/m²K); these balls are then collected Furnace Air, 35°C after moving a distance of L = 4.5 m. Choose steel: ks = 900°C 50 = 0.465 kg.K Air: ka = 0.025 Pa = 1.2800 kg,ca = 0.718 k] The...
k=300
BRO p=2800 kg are m3 Aluminum Heat sinks of rectangular profile (k = 290 W m-K c = 900 kg-K commonly used to remove heat from a surface whose temperature is Ts = 150°C. The temperature of the surrounding air is 20°C. The natural heat transfer coefficient associated with the surrounding air is h = 200 m2-K Determine the temperature distribution along a fin. W Alr Toogh 20 mm 3 5 150°C 90 mm Assumption: Steady State, Two-Dimensional Conduction...
W kg m-K m3 Two-Dimensional Steady and transient Conduction - Heat Sink Aluminum fins with triangle profiles (k = 290 p = 2800 ,C= 900 shown in the accompanying figure, are used to remove heat from a surface kg-K whose temperature is T, = 150°C. The temperature of the surrounding air is 20°C. The natural heat transfer coefficient associated with the surrounding air is h = 190, Determine the temperature distribution along a fin. w m-K Air To, h 20...
Most questions answered within 3 hours.
-
The Williams have a stock they have held for over a year that
they believe is...
asked 37 minutes ago -
11.53g sample of NaBr contains 22.34% Na by mass Considering
the law of constant composition how...
asked 1 hour ago -
Exercise 5-22A Complete the accounting cycle using receivable
transactions (LO5–1, 5–2, 5–4, 5–5, 5–7) [The following...
asked 2 hours ago -
Do you agree with the view that small businesses are more
vulnerable to employee theft because...
asked 2 hours ago -
Four forces act on an object, given by A = 41.3 N east, B = 46.3...
asked 3 hours ago -
Which of the following design considerations leads to more
user-friendly presentation layers for GUIs? [Check all...
asked 3 hours ago -
38%
of adults say cashews are their favorite kind of nut. You
randomly select 12 adults...
asked 6 hours ago -
Notational Inc. is considering installing a new server. The
machine costs $100,000 and is expected to...
asked 6 hours ago -
Given the information coding of DNA strand:
5'-TTT-TAC-GAA-GAG-TGA-3',
Write the corresponding DNA template and mRNA strand...
asked 6 hours ago -
2. Boris recently synthesized an explosive compound he named
Badenoughium. The molecular formula for Bdenoughium is...
asked 10 hours ago -
5. A car decelerate evenly from a velocity of 50mph until rest
in a distance of...
asked 10 hours ago -
IN HTML Programming
1. Write a script that inputs integers (one at a time) and
passes...
asked 10 hours ago