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)
Q: The time of flight for any projectile is 20 sec and its horizontal range is 400m, what is its…
A: Given, Time of flight = tF = 20 s Horizontal range = R = 400 m In the projectile motion, the…
Q: figure below, if = 0.2 supplied to all four wheels of the 1.5 Ma vehicle with the mass center at G…
A: Given:μs=0.2m=1.5 Mg
Q: HW9 In an engine governor of the Porter type, the upper and lower arms are 300 mm and 350 mm…
A: Given: The length of the upper arm, L1 = 300 mm The length of the lower arm, L2 = 350 mm The mass of…
Q: HW8 Two parallel shafts, about 200 mm apart, are connected by spur gears. One shaft is to run at 360…
A:
Q: N= 750 rpm. Shaft power-295 kw,n,-0. hratio=0.1. Inner dia= 0.5 Outer dia. Thi f circumfericala n…
A:
Q: 3/65 The rocket moves in a vertical plane and is being propelled by a thrust T of 32 kN. It is also…
A:
Q: The most important systems in automatic gear boxes are oil cooling and oil filtering systems.…
A: Option (e) : Planetary and Clutch systems
Q: HW13 The gearing of a machine tool is shown in the Figure below. The motor shaft is connected to…
A:
Q: The car starts from rest at s = 0 and increases its speed at at = 4 m/s2. Determine the time when…
A: Introduction: Motion is the condition of change in an object's location over time. Displacement,…
Q: Read the question carefully before answering. Box or indicate your final answers when solving and…
A: Given data: Conditions of air at entry in Diesel engine : 101.3 kPa and 26.85°C Compression ratio =…
Q: 5.) A 5-stage compressor has intake conditions of 100 kPa and 20C. The air must be discharged at 900…
A: Given: Initial pressure of the compressor: →P1=100 KPa Initial temperature of the compressor:…
Q: 4.) An ideal Brayton Cycle has air at 100 kPa and 25C entering the compressor. After the heating…
A:
Q: Wien's law is stated as follows: λmT = C, where C is 2898 um-K and Am is the wavelength at which the…
A:
Q: Q1/Determine the corrosion rate of carbon steel in salt solution from the following laboratory data.…
A:
Q: (A) Fill in the blankets 1. The control volume expression for the conservation of mass is the... 2.…
A: as per guidelines i have to solve only question of yours ,please repost remaining one. given = fill…
Q: kg An ideal dual combustion cycle where air has initial conditions air at 110 kPa and 20C, is…
A: Given data: Cycle : Ideal dual combustion cycle Initial conditions : 110 kPa and 20°C v2 = 0.051…
Q: When the car moves in a straight line ....... in the . rear axle no differential movement of the…
A:
Q: 05: For the given state of stresses shown, draw the required Mohr's circle and determine: The…
A:
Q: HW5 The arms of a Porter governor are 300 mm long. The upper arms are pivoted on the axis of…
A: Introduction: When the load on the engine rises, the speed of the engine decreases at the time…
Q: Sebuah jaringan pipa seperti pada gambar diatas dengan a = 0.42 m, b = 0.58 m dan c = 1.12 m…
A:
Q: 10. A Brayton cycle has a compression ratio of 10. Find the cycle efficiency. A. 54.23% B. 60.19% C.…
A:
Q: The smooth hollow tube assembly rotates about a vertical axis with angular velocity @ = 0 = 4.9…
A: Given data: ω=θ˙=4.9 rad/sω˙=θ¨=-1.9 rad/s2r=0.5 mr˙=-1.8 m/sr¨=4.7 m/s2 Need to determine the…
Q: An object is thrown from a height of 135 m with an initial velocity of 50 m/s and an angle of 53…
A: Please specify what to calculate.
Q: Explain the differences between Metallic and Non-metallic materials. Explain the differences between…
A: Dear student, According to guidelines, I am allowed to answer only three short…
Q: Define the main difference between thick and thin cylinders and give an example for each type of…
A:
Q: Q.6. A plate 450 mm x 150 mm has been placed longitudinally in a stream of crude oil (Sp. gravity…
A:
Q: The approximate distance between the two parallel shafts is 600 mm. The shafts are to be connected…
A:
Q: Q1) A) Define Four of the following termst 1-Process Comn 2-Kinetic energy 3- Nozzle 4-Combustion…
A: “Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: Point A of the circular disk is at the angular position 0 = 0 at time t = 0. The disk has angular…
A: Given: Let us consider the given data, r=145 mm=0.145 mω0=0.29 radsect=0α=1.8t rads2 To find: The…
Q: n a descriptive model, what are the primary elements that make up the structure?
A: A descriptive model depicts the relationship between a system or other object and its…
Q: For the connection shown, the average shear stress in the 18-mm- diameter bolts must be limited to…
A:
Q: can you do it in polygon
A: Given vectors : A : 2 kph 45°N of E B : 2.8 kph 58°E of S C : 5.1 kph 28°W of S D : 3.2 kph…
Q: An ideal Brayton Cycle has air at 100 kPa and 25C entering the compressor. After the heating…
A:
Q: The strain components for a point in a body subjected to plane strain are εx = -480 με, εy = -750με…
A:
Q: Two solid cylindrical rods (1) and (2) are joined together at flange B and loaded as shown. The…
A: Given that: diameter of rod 1 = 15 mm diameter of rod 2 = 28 mm It is required to determine the…
Q: A lorry of mass 5000 kg is driven across a metal beam bridge of mass 20 tonnes. The bridge is a…
A:
Q: Two parallel shafts are to be connected by spur gearing. The approximate distance between the shafts…
A:
Q: Differential system uses worm and wheel gears O helical gears. O spur gears. gears with moving axes.…
A:
Q: Governor has all four arms 440 mm long. The upper arms are attached on the axis of rotation and the…
A: Calculated range of speed and sensitivity of Governors.
Q: HW7 The arms of a Porter governor are 375 mm long. The upper arms are pivoted on the axis of…
A: Introduction: The governor balls revolve and generate an inward centrifugal force, which is commonly…
Q: Bar stock of initial diameter = 90 mm is drawn with a draft = 15 mm. The draw e has an entrance…
A:
Q: In reference to the figure, @ 1 ft Given: v = 8 ft/s w = 2 rad/s Determine the velocity in ft/s of…
A: Write the given data. v=8 ft/sω=2 rad/sr=1 ft
Q: increase in drilling spee
A:
Q: Find the steady-state solution of the forced mass-spring system with spring constant 2, damping…
A: Write the given data. k=2c=1F=sintmass is taken as, m=1
Q: To create AutoCAD Q: Use the principle of the geometric model shown in the following figure? R8 22…
A:
Q: A rectangular cross section steel column of length L, a fixed end at B and supports a concentric…
A: Solution - Given data - L = 45 in E = 10 x 106 psi P = 20…
Q: An aeroplane makes a complete half circle of 50 meters radius, towards the left, when flying at 200…
A: Given Data The radius is: R=50 m The velocity is: V=200 km/h=55.6 m/s The mass is: m=400 kg The…
Q: HW7 The arms of a Porter governor are 375 mm long. The upper arms are pivoted on the axis of…
A: Introduction: Gear trains link the engine to the governor's central spindle. When an engine's load…
Q: 2.30 A closed system consisting of 14.5 lb of air undergoes a polytropic process from p₁ = 80…
A:
Q: tion to the left ca e with greatest de d by 30 kN what
A:
Step by step
Solved in 3 steps
- 1.10 A heat flux meter at the outer (cold) wall of a concrete building indicates that the heat loss through a wall of 10-cm thickness is . If a thermocouple at the inner surface of the wall indicates a temperature of 22°C while another at the outer surface shows 6°C, calculate the thermal conductivity of the concrete and compare your result with the value in Appendix 2, Table 11.1.76 Explain a fundamental characteristic that differentiates conduction from convection and radiation.Using Table 1.4 as a guide, prepare a similar table showing the orders of magnitude of the thermal resistances of a unit area for convection between a surface and various fluids.
- Show that the rate of heat conduction per unit length through a long, hollow cylinder of inner radius ri and outer radius ro, made of a material whose thermal conductivity varies linearly with temperature, is given by qkL=TiTo(rori)/kmA where Ti = temperature at the inner surface To = temperature at the outer surface A=2(rori)/ln(ro/ri)km=ko[1+k(Ti+To)/2]L=lenthofcyclinderThe heat transfer coefficient between a surface and a liquid is 57 W/(m2K). How many watts per square meter will be transferred in this system if the temperature difference is 10C?A high-speed computer is located in a temperature-controlled room at 26C. When the machine is operating, its internal heat generation rate is estimated to be 800 W. The external surface temperature of the computer is to be maintained below 85C. The heat transfer coefficient for the surface of the computer is estimated to be 10W/m2K. What surface area would be necessary to assure safe operation of this machine? Comment on ways to reduce this area.
- A pipe carrying superheated steam in a basement at 10C has a surface temperature of 150C. Heat loss from the pipe occurs by radiation (=0.6) and natural convection (hc=25W/m2K). Determine the percentage of the total heat loss by these two mechanisms.One end of a 0.3-m-long steel rod is connected to a wall at 204C. The other end is connected to a wall that is maintained at 93C. Air is blown across the rod so that a heat transfer coefficient of 17W/m2 K is maintained over the entire surface. If the diameter of the rod is 5 cm and the temperature of the air is 38C, what is the net rate of heat loss to the air?As a designer working for a major electric appliance manufacturer, you are required to estimate the amount of fiberglass insulation packing (k = 0.035 W/m K) that is needed for a kitchen oven shown in the figure below. The fiberglass layer is to be sandwiched between a 2-mm-thick aluminum cladding plate on the outside and a 5-mm-thick stainless steel plate on the inside that forms the core of the oven. The insulation thickness is such that the outside cladding temperature does not exceed 40C when the temperature at the inside surface of the oven is 300C. Also, the air temperature in the kitchen varies from 15Cto33C, and the average heat transfer coefficient between the outer surface of the oven and air is estimated to be 12.0W/m2K. Determine the thickness of the fiberglass insulation that is required for these conditions. What would be the outer surface temperature when the inside surface of the oven is at 475C?
- 2. In determining the thermal conductivity of a plateflat insulator, the temperature was measured on both sides of the 25 mm thick plate and gave the results of 318.4 K and 303.2 K. FluxThe measured heat is 35.1 W.m-2. Illustrate the problem in a simple schematic/drawing, then calculate the thermal conductivity inbtu/h.ft.oF and in W/m.K! (0.033 ; 0.058) 3. A coil-shaped cooling pipe is made of SS-304 material. This pipe is 1 ft long, 0.4 inch outside diameter, and inch inside diameter. This coil cooling pipe is used to cool the water in the bath. The temperature of the inner coil pipe is 40oF while the outer coil in contact with water is 80oF. The thermal conductivity of SS-304 is a function of temperature where k(T) = 7.75 + (7.78 x 10-3).T where k is in Btu/h.ft.oF and T is in oF. Calculate the rate of heat dissipation in watts! (1287.7)GChoose the right answer 1. The temperature profile for steady hest conduction through a plane wall of constant thermal conductivity is a. logarithmic b. parabolic 2. A brick wall (k-0.75 W/mK ) transmits $02 of heat loss through another wall (k-0.25 W/mK, x-100 mm). If the temperature difference across both walls is the same, the thickness of the brick wall would be a.150 mm c. linear 6T b. 240 mm c. 300 mm d. 375 mm 3. The maximum temperature at the center of the solid sphere of radius R having heat generation q (W/m') is given by g'R +9R b. T, + 4k T+9R 6k d. T+9R 8k a. 2k C. 4. The internal thermal resistance of a solid can be ignored if the Biot number is less than a. 1 b. 0.5 c. 0.1 d. Fourier number 5. The ratio of heat transfer of a fin to the heat transfer without fin is referred to as a. fin resistance b. fin efficieney efin effectiveness d. fin conductance.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,