Question

In: Civil Engineering

A 4-m-high and 6-m-wide wall consists of a long 18x30 cm2 cross section of horizontal bricks...

A 4-m-high and 6-m-wide wall consists of a long 18x30 cm2 cross section of horizontal bricks (K=0.72W/mC) separated by 3-cm-thick plaster layer (K=0.22W/mC). There are also 2-cm-thick plaster layers on each side of the wall, and a 2-cm-thick rigid form (K=0.026W/mC) on the inner side of the wall. The indoor and outdoor temperatures are 22C and -4 C, and the combined convection and radiation heat transfer coefficients on the inner and outer walls are 10W/m2C and 20W/m2C, respectively. Determine the rate of heat transfer through the wall

Solutions

Expert Solution

Ally Wells answered 11 months ago
Next > < Previous

Related Solutions

An air tight laboratory is 4 m long and 3m wide and 3m high. the room...
An air tight laboratory is 4 m long and 3m wide and 3m high. the room is under normal atmospheric pressure and has a temperature of 20C A 10kg block of dry ice is then left in the room and evaporated into carbon dioxide gas molecular mas 44u. assuming that the temperature of the room does not change appreciably what will it's final pressure be ? stay out of the room as you may die from hypercapnia or carbon dioxide...
A 2-m-high, 4-m-wide rectangular advertisement panel is attached to a 4-m-wide, 0.15 m-high rectangular concrete block...
A 2-m-high, 4-m-wide rectangular advertisement panel is attached to a 4-m-wide, 0.15 m-high rectangular concrete block (density = 2300 kg/m3) by two 5-cm-diameter, 4-m-high (exposed part) poles, as shown in the figure. If the sign is to withstand 150 km/h winds from any direction, determine (a) the maximum drag force on the panel, (b) the drag force acting on the poles, and (c) the minimum length L of the concrete block for the panel to resist the winds. Take the...
A trough is 11m long, 5m wide, and 3m deep. The vertical cross-section of the trough...
A trough is 11m long, 5m wide, and 3m deep. The vertical cross-section of the trough parallel to an end is shaped like an isoceles triangle (with height 3m, and base, on top, of length 5m). The trough is full of water (density 1000kg/m3 and g=9.8m/s2 is the acceleration due to gravity). a) Find the amount of work in joules required to empty the trough by pumping the water over the top. b) Find the amount of work in joules...
A water trough is 8 m long and has a cross-section in the shape of an...
A water trough is 8 m long and has a cross-section in the shape of an isosceles trapezoid that is 30 cm wide at the bottom, 80 cm wide at the top, and has height 50 cm. If the trough is being filled with water at the rate of 0.1 m3/min how fast is the water level rising when the water is 40 cm deep?
A water trough is 8 m long and has a cross-section in the shape of an...
A water trough is 8 m long and has a cross-section in the shape of an isosceles trapezoid that is 30 cm wide at the bottom, 70 cm wide at the top, and has height 40 cm. If the trough is being filled with water at the rate of 0.3 m3/min how fast is the water level rising when the water is 20 cm deep?
A retaining wall x m high was designed to stabilize a horizontal ground surface. The back...
A retaining wall x m high was designed to stabilize a horizontal ground surface. The back of the wall is inclined 15 o to vertical direction and can be assumed rough with interface frictionangleofxo.Thesoilparametersareφ' =33o ,γ =18kN/m3,γ =20kN/m3. Assume no seepage effects. (a) Draw a diagram to show the given wall dimensions, relevant inclinations and the direction of the active force on the wall. (b) Calculate lateral force on the wall assuming the ground water table is at the base...
An aluminum rod with a square cross section is 1.2 m long and 5.0 mm on...
An aluminum rod with a square cross section is 1.2 m long and 5.0 mm on edge. (a) What is the resistance between its ends? (b) What must be the diameter of a cylindrical copper rod of length 1.2 m if its resistance is to be the same as that of the aluminum rod? The resistivity of aluminum is 2.75 × 10-8 Ω·m and the resistivity of copper is 1.69 × 10-8 Ω·m.
A 20 cm long horizontal spring (k= 200 N/m) is attached to a wall. A 2...
A 20 cm long horizontal spring (k= 200 N/m) is attached to a wall. A 2 kg box is attached to the other end. You pull the box 3 cm, displacing the spring from equilibrium. Assume the floor is frictionless. If the box is released from rest at t = 0 s: Write an equation describing the position of the box at some arbitrary time “t”. Go ahead and fill in the values for amplitude, phase angle, and angular frequency....
A solenoid that is 112 cm long has a cross-sectional area of 14.9 cm2. There are...
A solenoid that is 112 cm long has a cross-sectional area of 14.9 cm2. There are 1310 turns of wire carrying a current of 7.32 A. (a) Calculate the energy density of the magnetic field inside the solenoid. (b) Find the total energy in joules stored in the magnetic field there (neglect end effects).
A solenoid that is 91.4 cm long has a cross-sectional area of 24.8 cm2. There are...
A solenoid that is 91.4 cm long has a cross-sectional area of 24.8 cm2. There are 811 turns of wire carrying a current of 8.08 A. (a) Calculate the energy density of the magnetic field inside the solenoid. (b) Find the total energy in joules stored in the magnetic field there (neglect end effects).
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT