then design thickness of the wall
Q: a b c 5 4 1 in d 2 in h 1.5 ft The assembly shown has the dimensions given above. When a force of F…
A:
Q: Q6: A balloon behaves so the pressure is P = CV, C = 100 kPa/m. The balloon is blown up with air…
A:
Q: The mass-flow-rate of a fixed geometry inlet at overspeeded for starting mode (T~= 320 K, p~= 90…
A:
Q: Two aluminum plates, each having a width of b = 8.0 in. and a thickness of t = 0.750 in., are welded…
A:
Q: A fan draws 1.42 m³ per second of air at a static pressure of 2.54 cm of water through a duct 300 mm…
A: The stepwise procedure to solve this problem is shown in the following attached image:
Q: The velocity of a particle moving in the x-y plane is given by (5.60i + 4.27j) m/s at time t = 6.33…
A:
Q: calculate heat and work transfer in different processes of rankine cycle if it between 30 bar and…
A: Given that: For the reheat-Rankine cycle with single reheater, Boiler and condenser pressure are 30…
Q: Real operating diffuser throat area in a wind tunnel should be less than A_y^
A: Real operating diffuser condition is applying in the wind tunnel
Q: Q.1) for the system shown in figure (a). The pump has the characteristics shown in figure (b). What…
A: Pressure in the lower tank, PL=35 lb/in2=35*144=5040 lb/ft2Pressure in the upper tank, PU=10…
Q: A Pully drive system used in washing machine is designed based on flat belt as in Figure.1/a. The…
A: Given Data The tension in the pulley is:To=140 N The coefficients of friction is:μ=0.25 The lap…
Q: place the Force 70N by Equivalent System consist of one force &couple at 1: At Supporting point (A).…
A:
Q: 3/122 The collar has a mass of 2 kg and is attached to the light spring, which has a stiffness of 30…
A:
Q: You can change any of the layer properties, including - * aut cad color only O - None of the above.…
A:
Q: 1. A moving coil voltmeter with a resistance of 150 ohms gives a full scale deflection with a…
A: Electric current measurements are made with a moving coil galvanometer. It is a sensitive…
Q: A couple consists of two vertical forces of 60 lb each. One force acts up through A and the other…
A:
Q: When switched on, the grinding machine accelerates from rest to its operating speed of 2940 rev/min…
A: Given:N=2940 rev/mint1=5 sect2=36 sec
Q: For the following Figure: 1) Determine the magnitude of the vector V = V2- V1 ( 2) The angle which V…
A:
Q: Learning Goal: The two blocks shown have masses of mA = 43 kg and mB= 78 kg. The coefficient of…
A:
Q: If the drag resistance on the car due to the wind is FD = (10v) N, where is the velocity in m/s,…
A:
Q: A uniform light slender beam AB of section modulus EI is pinned by a frictionless joint A to the…
A:
Q: Q2: Find the solution to the following linear programming problem using the Graphical method Max…
A:
Q: An air-standard Spark Ignition cycle has a compression ratio of 10.2. Air is at 3000 0R at the end…
A: Given data as per the question compression ratio =10.2 As the inlet condition of the air is not…
Q: (3) A single-threaded jackscrew has square threads. The screw diameter is l in. and there are 4…
A:
Q: Q.1). The figure below shows a smooth curved vane attached to a rigid foundation. The jet of water,…
A:
Q: QI) a rigid tank with a volume of 2.5 m² contains 15 kg of saturated liquid-vapor mixture of water…
A:
Q: The heat flux from a wall to air in motion having a heat transfer coefficient of 15 W/m². K and…
A: Given data Heat transfer coefficient (h)=15 W/m2K Change in temperature (dT)=20 oC
Q: Problem 1) Rankine Cycle Analysis Consider a simple Rankine cycle, steam power plant. The state…
A: Given: “Since you have posted a question with multiple sub-parts, we will solve the first three…
Q: The vector quantity has O a. Direction only O b. Both magnitude and direction O c. Either magnitude…
A: “Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: 2 kg of ammonia is contained in a rigid sealed tank at 10 °C. The surroundings temperature is 95 °C.…
A: Given: For ammonia, m = 2 kg T1 = 10 oC T2 = 90 oC (saturated vapor condition) Surrounding…
Q: A horizontal L=1.2 m long mb=14 kg uniform bar is hinged on the left end and pulled at the right end…
A:
Q: Q1: Al Rabie Housewares Company produces goods A, B and C and the profit of Each of the mentioned…
A: Given data: Profit of product A=150 dollars Profit of product B=100 dollars Profit of product C=200…
Q: PROBLEM: A creamery plant must cool 11.06238 m^3 of milk from 30°C to 3°C. What must be the change…
A: Introduction: The internal energy of a system or body with well-defined boundaries is the sum of…
Q: The entropy change across a normal shock wave (Tox= 505 ,K, vx= 490 ms-1) 0.01171 Jkg-1K-1 O 0.0008…
A:
Q: An electric car is subjected to acceleration tests along a straight and level test track. The…
A: Given:v=24t-t2-5t12
Q: (a) Determine the reactions at A and E if P = 890 N. The reactions are positive if to the right or…
A:
Q: Q₁- (A) Compare between internal and external leakage with respect to 1- Where and when does it…
A:
Q: PROBLEM: Five miners must be lifted from a mineshaft (vertical hole) 100m deep using an elevator.…
A:
Q: Calculate the magnitude of the tension T and the angle 0 for which the eye bolt will be under a…
A:
Q: 5) When is the tangential force greater than the normal force? A) Only at the very beginning Q2/[ B)…
A: If it is the case of frictional force and Normal reaction then its option is D) part None of these…
Q: The velocity of a particle along the s-axis is given by v = 11s6/5 where s is in millimeters and v…
A: It is very basic question of mechanics. Used concept is kinematics of motion.
Q: Q. (A) Fill in the Blanks 1. The leakage in balanced flow control valve is 2. All pressure relief…
A: In this problem, we have to fill the suitable word or arrangement of words.
Q: The compound beam is subjected to a uniform dead load of 240 lb/ft and a uniform live load of 180…
A:
Q: The uniform 18-m pole has a mass of 200 kg and is supported by its smooth ends against the vertical…
A:
Q: 1. Specify the sizes of pipes (cast iron, schedule 40 ) and the size of the motor to be used for a…
A: Given Data: Flow rate of the pump, Q = 50 litres/sec = 0.05 m3/s Total static head, (z1 -z2) = 50 m…
Q: A rotary pump draws oil from (tank 1) and delivers it into (tank2), the level in (tank 1) is 3 m…
A:
Q: A rotary pump draws oil from (tank 1) and delivers it into (tank2), the level in (tank 1) is 3 m…
A:
Q: A drill bit of 10mm diameter rotating at 500 rpm with a feed rate of 0.2 mm/revolution is used to…
A: ◆ Given data: Diameter of drill bit: D = 10 mm Rotational speed: N = 500 rpm Feed rate: f = 0.2…
Q: A 15 m diameter cylindrical storage contains 900 m^3 of oil ( SG = 0.85, v = 2×10^-3 m^2/s). A 40 cm…
A:
Q: Cable AB passes over the small ideal pulley C without a change in its tension. What length of cable…
A: Given:W=49 lb
Step by step
Solved in 3 steps
- 2.30 An electrical heater capable of generating 10,000 W is to be designed. The heating element is to be a stainless steel wire having an electrical resistivity of ohm-centimeter. The operating temperature of the stainless steel is to be no more than 1260°C. The heat transfer coefficient at the outer surface is expected to be no less than in a medium whose maximum temperature is 93°C. A transformer capable of delivering current at 9 and 12 V is available. Determine a suitable size for the wire, the current required, and discuss what effect a reduction in the heat transfer coefficient would have. (Hint: Demonstrate first that the temperature drop between the center and the surface of the wire is independent of the wire diameter, and determine its value.)1.37 Mild steel nails were driven through a solid wood wall consisting of two layers, each 2.5-cm thick, for reinforcement. If the total cross-sectional area of the nails is 0.5% of the wall area, determine the unit thermal conductance of the composite wall and the percent of the total heat flow that passes through the nails when the temperature difference across the wall is 25°C. Neglect contact resistance between the wood layers.a. The wall of a building has a surface area of 50 m2. The outside layer of the wall is 20 cm thick concrete with thermal conductivity kcon = .8 W/m-K. The inner layer is 10 cm thick balsa wood (kbalsa = .048 W/m-K) as an insulator. Outside temperatures of 47o C are expected, while an inside temperature of 21o C is maintained by the cooling system. Find the rate of heat transfer through the wall.
- A plane wall is 2m high and 3m wide and is 20cm thick. It is made of a material that has a thermal conductivity of 0.50W/m-K. A temperature difference of 60 degrees Celsius is imposed on the two large faces. Find the heat flux.2. A refrigerated cold room wall has a thickness of 100mm and a thermal conductivity 0.14 W/m-K. The room wall has a 60mm thick internal lining of cork having a thermal conductivity of 0.05 W/m.K. The thermal conductance between the exposed faces and the respective atmosphere is 12 W/m²-K. If the room is maintained at 0°C and the external atmospheric temperature is 20°C, Calculate the heat loss rate through 1m² of the wall.2. Two walls of cold storage plant are composed of an insulating material (0.25 kJ/hr-m-°C), 100 mm thick at the outer layer and material (3.5 kJ/hr-m-°C), 15 cm thick at inner layer. If the surface temperature at the cold side is 30°C and hot side is 250°C, find the heat flux.
- A metal rod 1 sq.in in cross section and 6 in long heated at one end and cooled at the other. If the rate of heat input is 3BTU/hr and the difference in the temperature of the two ends is 2oF. Find: a. coefficient of thermal conductivity, W/m-K.Q2- Water flows inside a steel pipe with an ID of 2.5 cm. The wall thickness is 2 mm, and the convection coefficient on the inside is 100 Wm? C. The convection coefficient on the outside is 10 W/n C. The pipe is covered with a layer of asbestos. 1-determine the thickness of the asbestos layer at the critical insulation radius of the pipe. 2-calculate the change percent of heat transfer with and without the insulation. 3-commet on your results,4. A wall of thickness 10cm conducts heat at rate of 30W/m² when the temperature difference across wall is 10K. What is thermal conductivity (W/mK)
- 2. A steel plate of k=50w/mk and thickness 10cm passes a heat flux by conduction of 25kW/m² . If the temperature of hot surface of plate is 100C, then what is the temperature of the cooler side of plate?Thermal Conductivity Problems: a. A wall is made of firebrick 6 inches thick and has a 50°C difference in temperature both sides. Calculate the heat transferred through the wall if the thermal conductivity of the brick is 0.65 BTU/hr-ft- oF. b. Compute the amount of heat flow per second through an iron plate 2 cm thick and the area of 5000 cm² if one face has a temperature of 150°C and the other face is 140°C? The thermal conductivity for iron is 80 W/m-K.6. a. The heat flux applied to the walls of the biomass combustion furnace is 20 W/m2. The furnace walls have a thickness of 10 mm and a thermal conductivity of 12 W/m.K. If the wall surface temperature is measured to be 50oC on the left and 30oC on the right, prove that conduction heat transfer occurs at a steady state!b. Heating the iron cylinder on the bottom side is done by placing the iron on the hotplate. This iron has a length of 20 cm. The surface temperature of the hotplate is set at 300oC while the top side of the iron is in contact with the still outside air. To reach the desired hotplate temperature, it takes 5 minutes. Then it takes 15 minutes to measure the temperature of the upper side of the iron cylinder at 300oC. Show 3 proofs that heat transfer occurs transiently