Homework Answers
Please rate.
Add Answer to:
A 100-mm-thick steel (AISI 1010) plate, which is initially at a uniform temperature of 200°C needs...
A large stainless steel (AISI 316) plate having a thickness of 5 mm is initially at...
A large stainless steel (AISI 316) plate having a thickness of 5 mm is initially at a temperature of 70°C, and both sides of the plate are suddenly exposed to a convection environment at 20°C with the heat transfer coefficient of h= 800 W/m 2 oC. What will be the center and surface temperatures of the plate after 10 s? For stainless steel (AISI 316), α = 348x10-6 m2/s and k = 13.4 W/m K.
3. A large, 5-cm thick plate of pure aluminum initially at a uniform temperature of 200°C...
3. A large, 5-cm thick plate of pure aluminum initially at a uniform temperature of 200°C is suddenly exposed to a convection environment in which the fluid temperature is 50°C and the heat- transfer coefficient is 1200 W/ m K. Calculate the temperature of the plate at a depth of 1.5 cm from one of the surfaces after 3 min. How much heat is lost from the plate during this time? Ans: Tplate = plane
Steel is sequentially heated and cooled (annealed) to relieve stresses and to make it less brittle....
Steel is sequentially heated and cooled (annealed) to relieve stresses and to make it less brittle. Consider a 100-mm-thick plate (k = 45 W/m.K, p= 7800 kg/m3, cp = 500 J/kg.K) that is initially at a uniform temperature of 180°C and is heated (on both sides) in a gas-fired furnace for which T. = 700°C and h= 500 W/m2.K. How long will it take for a minimum temperature of 550°C to be reached in the plate? sec. It will take...
Q2:- Carbon steel (AISI 1010) shafts of 0.1-m diameter are heat treated in a gas-fired furnace...
Q2:- Carbon steel (AISI 1010) shafts of 0.1-m diameter are heat treated in a gas-fired furnace whose gases are at 1100 K and provide a convection coefficient of 100 W/m²K. If the shafts enter the furnace at 300 K, how long must they remain in the furnace to achieve a centerline temperature of 700 K?
A plate of thickness L is initially at uniform temperature Ti. A second plate of the same materia...
A plate of thickness L is initially at uniform temperature Ti. A second plate of the same material of thickness L2 is initially at uniform temperature T2. At t20 the two plates are fastened together with a perfect contact at the interface. Simultaneously, the surface of one plate is heated with uniform flux qo and the opposite surface begins to exchange heat by convection with the surroundings. The heat transfer coefficient is h and the ambient temperature is T Determine...
Consider a plate-type fin made of AISI 1010 steel attached to an isothermal wall which is...
Consider a plate-type fin made of AISI 1010 steel attached to an isothermal wall which is maintained at 250 C. The fin has a length of 150mm, a thickness of 25mm and a width w. Argon at 20 C blows over the fin giving a convective heat transfer coefficient of 25 W/m-K. Calculate heat transfer rate per unit width using the graphical method and checking the answer with the appropriate equation.
Consider a plate-type fin made of AISI 1010 steel attached to an isothermal wall which is...
Consider a plate-type fin made of AISI 1010 steel attached to an isothermal wall which is maintained at 250 C. The fin has a length of 150mm, a thickness of 25mm and a width w. Argon at 20 C blows over the fin giving a convective heat transfer coefficient of 25 W/m-K. Calculate heat transfer rate per unit width using the graphical method and checking the answer with the appropriate equation
A 30-mm thick AISI 1020 steel plate is sandwiched between two 2024-T3 aluminum plates, one 10-mm...
A 30-mm thick AISI 1020 steel plate is sandwiched between two 2024-T3 aluminum plates, one 10-mm thick and the other 20-mm thick, and compressed with a bolt and nut with no washers. The bolt is M10 x 1.5, property class 5.8 a) Determine a suitable length for the bolt, rouded up to the nearest 5 mm b) Estimate the bolt stiffness c) Estimate the stiffness of the members d) Calculate the joint constant C. 20 aA
A 30-mm thick AISI...
A 50 mm thick steel plate (AISI347) has a uniform heat flux applied to its bottom...
A 50 mm thick steel plate (AISI347) has a uniform heat flux
applied to its bottom surface by a heater. The heater is in contact
with the steel plate, and the interface between the heater and
steel has a contact resistance of 2.0 x 10-4
m2*K/W. The top surface of the plate is exposed to
surrounding air (T = 20oC, h = 10 W/m2*K) and
exchanges radiation with surroundings at Tsur =
10oC. The emissivity of the plate is 0.85....
A plate-type fin made of AISI steel (k = 58.3 W/m-K) having a length of 150...
A plate-type fin made of AISI steel (k = 58.3 W/m-K) having a length of 150 mm, a thickness of 25 mm, a base temperature of 250 C and a width w is exposed to a convection environment at 20 C with an h = 25 W/m2-K. a) Determine q' using the fin equations. b) Determine q' using the definition of fin efficiency and the efficiency plots in the book (graphical solution). width is not giving nor width units.
A large stainless steel (AISI 316) plate having a thickness of 5 mm is initially at a temperature of 70°C, and both sides of the plate are suddenly exposed to a convection environment at 20°C with the heat transfer coefficient of h= 800 W/m 2 oC. What will be the center and surface temperatures of the plate after 10 s? For stainless steel (AISI 316), α = 348x10-6 m2/s and k = 13.4 W/m K.
3. A large, 5-cm thick plate of pure aluminum initially at a uniform temperature of 200°C is suddenly exposed to a convection environment in which the fluid temperature is 50°C and the heat- transfer coefficient is 1200 W/ m K. Calculate the temperature of the plate at a depth of 1.5 cm from one of the surfaces after 3 min. How much heat is lost from the plate during this time? Ans: Tplate = plane
Steel is sequentially heated and cooled (annealed) to relieve stresses and to make it less brittle. Consider a 100-mm-thick plate (k = 45 W/m.K, p= 7800 kg/m3, cp = 500 J/kg.K) that is initially at a uniform temperature of 180°C and is heated (on both sides) in a gas-fired furnace for which T. = 700°C and h= 500 W/m2.K. How long will it take for a minimum temperature of 550°C to be reached in the plate? sec. It will take...
Q2:- Carbon steel (AISI 1010) shafts of 0.1-m diameter are heat treated in a gas-fired furnace whose gases are at 1100 K and provide a convection coefficient of 100 W/m²K. If the shafts enter the furnace at 300 K, how long must they remain in the furnace to achieve a centerline temperature of 700 K?
A 30-mm thick AISI 1020 steel plate is sandwiched between two 2024-T3 aluminum plates, one 10-mm thick and the other 20-mm thick, and compressed with a bolt and nut with no washers. The bolt is M10 x 1.5, property class 5.8 a) Determine a suitable length for the bolt, rouded up to the nearest 5 mm b) Estimate the bolt stiffness c) Estimate the stiffness of the members d) Calculate the joint constant C. 20 aA
A 30-mm thick AISI...
A 50 mm thick steel plate (AISI347) has a uniform heat flux
applied to its bottom surface by a heater. The heater is in contact
with the steel plate, and the interface between the heater and
steel has a contact resistance of 2.0 x 10-4
m2*K/W. The top surface of the plate is exposed to
surrounding air (T = 20oC, h = 10 W/m2*K) and
exchanges radiation with surroundings at Tsur =
10oC. The emissivity of the plate is 0.85....
Most questions answered within 3 hours.
-
The mean waiting time at the drive-through of a fast-food
restaurant from the time an order...
asked 4 minutes ago -
The pitch (p) of a helix is defined as p = dn, in which n is...
asked 6 minutes ago -
Do you agree that the declining stock of social capital is the
blame for the failure...
asked 9 minutes ago -
A researcher is interested in whether coffee consumption helps
with performance on reading comprehension tasks. The...
asked 19 minutes ago -
it has been estimated since the beginning of the human race that
about 133 metric ton...
asked 25 minutes ago -
Where must Medicare prescription drug plans allow for
participants to fill their prescriptions?
asked 28 minutes ago -
Five moles of monatomic ideal gas have initial pressure 2.50 ×
103 Pa and initial volume...
asked 43 minutes ago -
A resistor and the capacitor are used to control the timing in
the RC circuit of...
asked 42 minutes ago -
Living in a group could bring several disadvantages to an
individual. What are some of the...
asked 1 hour ago -
Complete and balance the following reactions. In case of no
reaction occurring write NR.
Mix #1:...
asked 1 hour ago -
If an economy consumes 75% of any increase in income, then an
increase in autonomous investment...
asked 1 hour ago -
A shotputter throws the shot with an initial speed of 15.8 m/s
at a 38.0 ∘...
asked 1 hour ago