Q1:1 Consider a 1.2-m-high and thermal conductivity is k = 0.78 through this glass window and the t the room is maintained at 24°C whi convection heat transfer coefficients h₁= 10 W/m². °C and h₂= 38 W/m²
Q: 8. By how much do the two springs stretch in the equilibrium configuration below in order to support…
A: Given: The mass of block, m = 25 kg The unstreched length of springs, x = 2.2 m The spring constant,…
Q: Selecting a proper pump for a service involves four primary areas to be considered for system…
A: The four important things to be considered before selecting the pump are, the total head or…
Q: Design for , that is, the load can be taken by other members or the effect of fatigue failure…
A: 6) aeroplane 7) high tolerance 8) cause and effect analysis
Q: m and it reduces to 0.8 cm at the nozzle exit. If it takes 50s to fill the bucket with water,…
A: V=10gal∆t=50sD=2cmDiameter hole reduces = 0.8cm To-Find:- a Volumetric Flow rate and mass flowrate…
Q: 17-5B pencil is lighter than 5H pencil. O True O False 8- This figure shows center line. O True O…
A: (17) In this problem, it is asking that 5B pencil is lighter than 5H or not.
Q: A particle is initially at rest and given an acceleration a = 6t2 m/s2 where t is in seconds. What…
A: Givena=6t2t=2s
Q: disc rolls straight on a flat floor without slipping. The magnitude of the angular velocity ω= 3.0…
A:
Q: Q1-A/ In a tensile test on a metal specimen, true strain = 0.08 at a stress = 265 MPa. When the true…
A:
Q: Stirrer A, B and C with a specifications of mA = 5 kg, m³ = 3 kg, mc = 4 kg and r4 = 1 m, rв = 2 m,…
A: For static balance m*r polygon from all masses should be closed. so, here we need to construct m*r…
Q: An universal coupling is used to connect two mild steel shafts transmitting a torque of 6000 N-m.…
A: Given Torque. T = 6000 N.m Shear stress for the shaft = 55 MPa Shear…
Q: 3. A seamless steel pipe carries 2000 m³ of steam per hour at a pressure of 1.2 N/mm². The velocity…
A: Solution to first question as per our company policy:
Q: Determine the vertical acceleration of the cylinder with a weight WA = 71 lb for each of the two…
A:
Q: elocity of the plate C is VC=6.0 m/s to the right. The velocity of the plate D is VD=2.0 m/s to the…
A:
Q: Situation 10. A vehicle starts from rest at t = 0 and travels along a horizontal. circular track…
A:
Q: j of air in the pipe is limited to 10 m/s and the permissible tensile stress for the material of the…
A:
Q: a. According to the table listed below; Yield Tensile Strain Fracture Elastic Material Strength…
A: Given
Q: A motorcycle patrolman starts from rest at A two seconds after a car, speeding at the constant rate…
A:
Q: evices that allow for a constant velcoity ratio between two
A: A universal joint (also known as a universal coupling, U-joint, Cardan joint, Spicer or Hardy…
Q: Shown in the figure is a 258-kg homogeneous cylinder that slipping on the rolls without horizontal…
A: Equations 1 and 2 are Newton's 2nd law of motion for rotation and translation respectively.
Q: Learning Goal: To become familiar with the general equations plane strain used for determining…
A:
Q: Determine the mass moments of inertia (in slug-ft²) and the radii of gyration of the steel machine…
A:
Q: A projectile is launched with a speed v0 = 50 m/s at angle = 35°. How long does it take to reach the…
A: Introduction: A projectile is any item hurled into space with just gravity acting on it. Gravity is…
Q: Express and identify the resultant of the two forces and one couple shown acting on the shaft angled…
A:
Q: Show that a one-DOF mechanism with only lower pairs always has an even number of links.
A: In general degree of freedom for the planar (2-D) mechanisms is given by, n=3×l-1-2j-h where, n =…
Q: Q1/B/Answer the following. 1- Which of the following is an unconventional process of machining? a)…
A: Given questions: 1. Which of the following is an unconventional process of machining?2. In CNC…
Q: What properties does an involute have? Please answer this based on the notations in the figure.
A: Although a variety of profiles can be employed to create gears, the involute curve is the most…
Q: 8. Design a shaft and flange for a Diesel engine in which protected type of flange coupling is to be…
A:
Q: Ferritic sainless steel can be hardened as much as austenitic stainless stess. False O True Non…
A: Correct answer: (1) True (2) True
Q: F3-4. The block has a mass of 5 kg and rests on the smooth plane. Determine the unstretched length…
A:
Q: Design for , that is, the load can be taken by other members or the effect of fatigue failure…
A: 6) aeroplane 7) high tolerance 8) cause and effect analysis
Q: 12-41 Consider a circular grill whose diameter is 0.3 m. The bottom of the grill is covered with hot…
A: Grill diamter, D = 0.3 m Radius of the grill (r) = D/2 = 0.15 m Temperature of the coal bricks, T1…
Q: Design for , that is, the load can be taken by other members or the effect of fatigue failure…
A: 6) aeroplane 7) high tolerance 8) cause and effect analysis
Q: Explain the correct position for holding a separatory funnel when shaking
A: Simple extractions are performed with the separatory funnel. The separatory funnel is made up of…
Q: A Carnot heat engine operating between two reservoirs at 20 °C and 350 °C produces 10 kW of net…
A:
Q: A mass of 25 kg is at limiting equilibrium on a smooth plane which is inclined at an angle of 30…
A: Given data: Mass of block = 25 kgThe plane is angled at 30° to the vertical.
Q: 6. Design for , that is, the load can be taken by other members or the effect of fatigue failure…
A: Solution to first three sub-parts as per our company policy.
Q: 2/100 An earth satellite which moves in the elliptical equa- torial orbit shown has a velocity v in…
A:
Q: esign for that is, the load can be taken by other members or the effect of fatigue failure otherwise…
A: 6) aeroplane 7) high tolerance 8) cause and effect analysis
Q: Situation 11. A 50-1b object is moving horizontally to the right with a velocity of 10 fps, collides…
A:
Q: For the pulley system below, which equation is true about the length of the cord marked as blue? If…
A:
Q: Q/ Determine the resultant couple moment acting on the triangular shown: 600 N 400 KN 600 N 250 N…
A:
Q: Q1/B/ Answer the following. 1- Which of the following is an unconventional process of machining? a)…
A:
Q: A cylinder rolls without slipping between two moving plates C and D. The radius of the cylinder is…
A:
Q: Q1 (a) The rotating elements in machine system often generate unbalance forces due to unbalance mass…
A:
Q: *2-32. Determine the magnitude of the resultant force and its direction, measured counterclockwise…
A:
Q: Four kg of water is placed in a tank volume of 1 m³. Heat is added until the temperature is 130 °C.…
A: Given: m = 4kg v = 1m3 T = 130 deg C
Q: Three kilograms of water at 35 degrees Celsius are placed in a piston under 4.335MPa (State 1). Heat…
A:
Q: An ideal Brayton cycle has a low and high pressure of 14.7 psia and 100 psia. The temperature of the…
A:
Q: In the design of a conveyor-belt system, small metal blocks are discharged with a velocity of 0.4…
A:
Q: A power screw has single square threads. It has a major diameter of 36 mm and a pitch of 6 mm. The…
A:
Step by step
Solved in 2 steps with 2 images
- Consider a steam pipe of length 15 ft, inner radius 2 in., outer radius 2.4 in., and thermal conductivity 7.2 Btu/hr-ft-°F. Steam is flowing through the pipe at an average temperature of 250°F, and the average convection heat transfer coefficient on the inner surface is given to be 1.25 Btu/hr-ft2-°F. If the average temperature on the outer surfaces of the pipe is 160°F, determine the rate of heat loss from the steam through the pipe. ANSWER:______Btu/hrSteam at To1= 320°C flows through a cast iron pipe (k = 80 W/mK) with inner and outer diameters of D1= 5cm and D2 = 5.5 cm, respectively. The pipe is covered with 3-cm-thick glass wool insulation with k = 0.05 W/mk(Figure Q2). Heat is lost to the surroundings (To2 = 5°C) by natural convection and radiation, with a combinedheat transfer coefficient of h2 = 18 W/m2.K.(a) Taking the heat transfer coefficient inside the pipe to be h1 = 60 W/m2 K, Calculate the rate of heat lossfrom steam per unit length of pipe.(b) Calculate the temperature differences between the pipe shell and the insulation. Someone comments that a microwave oven can be viewed as a conventional oven with zero convectionresistance at the surface of the food. Is this a correct statement? Discuss the reason.In a meat processing plant, 2-cm-thick steaks (k =0.45 W/m·K and a = 0.91 * 1027 m2/s) that are initially at25°C are to be cooled by passing them through a refrigerationroom at 211°C. The heat transfer coefficient on both sides ofthe steaks is 9 W/m2·K. If both surfaces of the steaks are to becooled to 2°C, determine how long the steaks should be keptin the refrigeration room. Solve this problem using analyticalone-term approximation method (not the Heisler charts).
- Steam at 235°C is flowing inside a steel pipe(k = 61 W/m·K) whose inner and outer diameters are10 cm and 12 cm, respectively, in an environment at 20°C.The heat transfer coefficients inside and outside the pipeare 105 W/m2·K and 14 W/m2·K, respectively. Determine(a) the thickness of the insulation (k = 0.038 W/m·K) neededto reduce the heat loss by 95 percent and (b) the thickness ofthe insulation needed to reduce the exposed surface temperatureof insulated pipe to 40°C for safety reasons.To defrost ice accumulated on the outer surface of an automobile windshield, warm air is blown over the inner surface of the windshield. Consider an automobile windshield with thickness of 5 mm and thermal conductivity of 1.4 W/m·K. The outside ambient temperature is -10°C and the convection heat transfer coefficient is 200 W/m2·K, while the ambient temperature inside the automobile is 25°C. Determine the value of the convection heat transfer coefficient for the warm air blowing over the inner surface of the windshield necessary to cause the accumulated ice to begin melting.- Steam at 280C flows in a stainless steel pipe k = 15 W/m.K whose inner and outer diameter are 5cm and 5.5cm, respectively. The pipe covered with 3cm glass wool insulation k = 0.038 W/m.K. Heat is lost to the surroundings at 5C by natural convection and radiation, with a combined natural convection and radiation heat transfer coefficient of 22W/m2.K. Taking the heat transfer coefficient inside the pipe to be 80W/m2.K, determine the rate of heat loss from the steam per unit length of the pipe. Also determine the temperature drop across the pipe shell and the insulation
- 10 m long pipe is being used to deliver steam through a processing plant. The inner radius of the pipe is r1 = 6 cm and the thickness of the pipe is 2 cm. Thermal conductivity k = 8 W/m⋅K and the average temperature steam flowing through the pipe is 160°C, the average convection heat transfer coefficient on the inner surface is given to be h = 20 W/m2⋅K. If the average temperature on the outer surfaces of the pipe is T2 = 70°C, (a) express the differential equation and the boundary conditions for steady operating conditions, (b) determine a relation for the variation of temperature in the pipe, and (c) evaluate the rate of heat loss (heat of conduction) from the steam through the pipe.The temperature of a gas stream is to be measured by a thermocouple whose junction can be approximated as a 1.2-mm-diameter sphere. The properties of the junction are k = 35 W/m·K, r = 8500 kg/m3, and cp = 320 J/kg·K, and the heat transfer coefficient between the junction and the gas is h = 90 W/m2·K. Determine how long it will take for the thermocouple to read 99 percent of the initial temperature difference.Consider a 1.2-m-high and 2-m-wide glass window whose thickness is 6 mm and thermal conductivity is k = 0.78 W/m·K. Determine the steady rate of heat transfer through this glass window and the temperature of its inner surface for a day during which the room is maintained at 24°C while the temperature of the outdoors is 25°C. Take the convection heat transfer coefficients on the inner and outer surfaces of the window to be h1 = 10 W/m2·K and h2 = 25 W/m2·K, and disregard any heat transfer by radiation.
- Steam at 320°C flows in a stainless steel pipe (k = 15 W/m-°C) whose inner and outer diameters are 5 cm and 5.5 cm, respectively. The pipe is covered with 3-cm-thick glass wool insulation (k = 0.038 W/m-°C). Heat is lost to the surroundings at 5°C by natural convection and radiation, with a combined natural convection and radiation heat transfer coefficient of 15Wm2-°C. Taking the heat transfer coefficient inside the pipe to be 80 W/m2-°C, determine the rate of heat loss from the steam per unit length of the pipe. Also determine the temperature drops across the pipe shell and the insulation.Question 2: Consider a 0.8-m-high and 1.5-m-wide glass window with a thickness of 8 mm and a thermal conductivity of k 0.78 W/m · °C. Determine the steady rate of heat transfer through this glass window and the temperature of its inner surface for a day during which the room is maintained at 20°C while the temperature of the outdoors is 10°C. Take the heat transfer coefficients on the inner and outer surfaces of the window to be h1 10 W/m2 · °C and h2 40 W/m2 · °C, which includes the effects of radiation.Hot water at an average temperature of 70°C is flowing over a 15-m section of a cast iron pipe (k = 52 W/m·K) whose inner and outer diameters are 4 cm and 4.6 cm, respectively. The inner surface of the pipe exchanges heat by convection and radiation to the cold air at 10°C inside the pipe, with a convective heat transfer coefficient of 15 W/m2·K and heat transfer coefficient for radiation is 6.157 W/m2·K. The heat transfer coefficient at the outer surface of the pipe in the hot water side is 120 W/m2·K, Draw the thermal resistance network and determine the rate of heat loss from the hot water.