Consider a long, pure iron rod with a diameter of 2 cm and at an initial uniform temperature of 27 C. It is suddenly heated by uniform and constant convection with T_inf = 227 C and h_inf = 200 W/m^2 K. Ignoring radiation, determine the center temperature of the rod after 45 seconds.
Q: It is desired to analyze heat transfer (or thermal load) and miscellaneous loadsfor a light work…
A: The heat transfer through a surface can be calculated using the formula: Q = U * A * ΔT, where Q is…
Q: I need help with this one to practice for exam I’m stuck ! Help
A: A detailed explanation for each section of your question on refrigeration: (i) Absorption…
Q: Shaft ABC comprises a brass section AB and a steel section BC with different diameters shown in the…
A:
Q: Consider the simply supported beam shown below. Suppose that F=14 KN and w = 8kN/m. Take E=200GPa…
A: Step 1:Step 2:Step 3:Please rate the solution.
Q: Calculate the rate of flow of waste thermal energy out of the engine in the exhaust gases in kW (to…
A: The problem is asking us to calculate the rate of flow of waste thermal energy out of the engine in…
Q: A- Air at dry bulb temperature 15 °C and wet bulb temperature 11 °C enters a heating coil. The…
A: Given ,T = 15 CTw1 = 11 CTd3 = 41 CBPF = 0.5( i )By pass factor ,BPF = Td3−Td2/Td3−Td10.5 =…
Q: An 18 teeth sprocket driving with 98 teeth sprocket at a center distance of 34 pitches. Find the…
A: Approach to solving the question: Detailed explanation: Examples: Key references:
Q: The uniform sign has a weight of 1500 lb and is supported by the pipe AB, which has an inner radius…
A: Step 1: Given dataw=1500 lbri=2.75 inro=3 inP=150 lb/ft2 Step 2: Draw FBD of the given figureStep 3:…
Q: Determine the principal stresses in the beam at point A. Specify the orientation of the element…
A: here's how to analyze the stress at point G:Information Needed:Beam geometry (width and…
Q: show complete solution and complete fbd
A:
Q: Please answer the below using the same table layout I have. I have attempted but I do not know…
A:
Q: Note: please show step by step solution. Hence, double check the solution. For correction purposes!.…
A:
Q: 1. Calculate the member force GF (in kN) (Answer: -29.3) and GD (Answer: 2.3). 2. Calculate the…
A: Solution: Method of Sections approach
Q: 4.9 The length of the bar AP is 650 mm. The radius of the pulley is 120 mm. Equal forces T = 50 N…
A:
Q: With the data below solve the problems:
A: the system, here's how to find the force F2:Analyze the moment balance:Identify moment arms:The…
Q: Need help on all questions. Please include all units, steps to the problem and information such as…
A:
Q: A jet is coming out of a dive, and a sensor in the pilot's seat measures a force of 800lb for a…
A: Step 1:To determine the radius of curvature (R) of the plane's path at a given instant, we can use…
Q: Please don't use AI to solve the questionnn, thanks sir for your effortsssss
A: To create parametric equations representing my last name "Garcia" and plot it using MATLAB, I will…
Q: Need help on all the questions. Please include units and all possible steps. Thanks
A: Step 1:Step 2:Step 3:
Q: solve this 3D RIGID BODY EQUILIBRIUM please
A: Step 1: Step 2: Step 3: Step 4:
Q: I need help to prepare to tomorrows exam. It needs to be shown on psychometric chart as well.
A: Step 1: (i) Air can be heated either by using an electrical heating coil or by injecting hot steam.…
Q: In the vise shown in the figure, the screw is single-threaded in the upper member: It passes through…
A: Step 1:Given data:In the vise shown in the figure, the screw is single-threaded in the upper member,…
Q: In the position shown, collar B moves to the left with a constant velocity of 360 mm/s. Determine…
A:
Q: The figure shows a graph of force against distance for a locomotive pushing a carriage along a train…
A: To calculate the work done from a force-position graph, you need to find the area under the graph.…
Q: Plant R(S) E(S) U(S) Y(S) K G(s) Figure Q3 For the closed loop system shown in Figure Q3: (a)…
A: The gain and phase margins of a closed-loop system can be found using the Nyquist plot of the…
Q: This is a multi-part question. Once an answer is submitted, you will be unable to return to this…
A: Step 1:The initial velocity of the ski jumper in x-direction is v0=26m/sThe inclination angle is…
Q: 8
A: Step 1:Step 2:
Q: 1. Piezoelectric materials are often used as sensor materials because they transform mechanical…
A:
Q: 8. The frequency of vibration can be used to monitor the change in mass. For example, the vibration…
A:
Q: dear eng pls ans quickly thanks
A: the image to a corresponding instruction list (IL) without more information about the specific PLC…
Q: Answer this ole
A: Detailed explanation: Let's break down the problem step by step. Given Information:Airfoil type:…
Q: pls very urgent using the formulas required in the picture
A:
Q: 6. A drone motor can apply a maximum torque of T = 2.1 N. m. At the start of the rotation, the…
A: 1. Notations and Given ValuesPoints: O, B, C, D, and E represent the centers of the joints as…
Q: Design a synchronous sequential logic circuit that counts through the repetitive binary sequence…
A: Step 1:Step 2:
Q: 2
A:
Q: dear eng pls ans quickly thanks
A: the image you sent, which shows a diagram of an aileron painting station, here's how the system…
Q: Need help on all questions. Please include all units, steps to the problem and information such as…
A:
Q: Please answer part ii only given that the answer to part i is-20 degrees
A: the image, here's how we can approach this problem:Assumptions:The nitrogen gas can be treated as an…
Q: The W250x22 cantilevered beam is made of A-36 steel and is subjected to the loading shown below.…
A: Step 1:For W250X22 steel section, I = 28900000 mm4 = 2.89 X 10-5 m4 Modulus of Elasticity (E) for…
Q: 1.If P = 3,000 N and Q = 1,000 N, determine the force in member CD (in kN) (ANSWER: 5.25 (C)) and…
A: for moment I have taken CCW as positive and CW as negative if you have any doubts please comment
Q: The velocity of A is 3.0 m/s downward, the velocity of B is 5.0 m/s upward, and the velocity of D is…
A: Step 1:To determine velocity of C, Thе velocity of C is positivе if downward, nеgativе if upward.…
Q: In Figure, W = 120 kN. 1. Calculate the force (kN) in AC. (ANSWER: 69.2 (T)) 2. Calculate the force…
A:
Q: Please answer the question below. I have attempted it but I do not know where I have gone wrong.…
A: I included the calculations also please go through themif you have any doubt please comment
Q: Need help, include all steps and units please and thanks.
A: Create a free-body diagram at the joint where the cables meet.Since the pulley is frictionless, the…
Q: The Johnson & Royce model of a distillation column is driven by the inputs of steam flow and its…
A: Step 1: By expanding the determinant, (−2−λ)(−λ)−(−7)(1)=0λ2+2λ+7=0 Step 2: Use the quadratic…
Q: Determine the sensitivity of the overall transfer function for the system shown in figure below with…
A: Step 1:Step 2::
Q: 20 (B) An air vessel, which is made of steel in 2 m long. It has an external diameter 44 cm and is 2…
A:
Q: e. What is the moment caused by the force, F, -9641bf, on around POINT A on the block if 0 = 42°, a…
A:
Q: This is a multi-part question. Once an answer is submitted, you will be unable to return to this…
A: Step 1: Step 2:Step 3: Step 4:
Q: Ask Copilot + เท (b) of 7 A Question 5 A steel bar AD shown in Figure Q5 has a cross-sectional area,…
A: The change in length of the bar can be calculated using the formula:ΔL = PL/EAwhere ΔL is the change…
Consider a long, pure iron rod with a diameter of 2 cm and at an initial uniform temperature of 27 C. It is suddenly heated by uniform and constant convection with T_inf = 227 C and h_inf = 200 W/m^2 K. Ignoring radiation, determine the center temperature of the rod after 45 seconds.
Step by step
Solved in 2 steps with 1 images
- 1.60 Two electric resistance heaters with a 20 cm length and a 2 cm diameter are inserted into a well-insulated 40-L tank of water that is initially at 300 K. If each heater dissipates 500 W, what is the time required for bringing the water temperature in the tank to 340 K? State your assumption for your analysis.A long cylindrical rod has a 20-cm-diameter at a uniform temperature of 600°C. The rod is then allowed to cool slowly in a room at 200°C with a heat transfer coefficient of 80 W/m² °C. Calculate the temperature at the center of the rod 45 min after the start of the cooling process. Also, determine the heat transfer per unit length of the rod during this time period.A hollow aluminum cylinder 16.5 cm deep has an internal capacity of 2.000 L at 23.0°C. It is completely filled with turpentine at 23.0°C. The turpentine and the aluminum cylinder are then slowly warmed together to 75.0°C. (The average linear expansion coefficient for aluminum is 2.4 10-5 °C−1, and the average volume expansion coefficient for turpentine is 9.0 10-4 °C−1.) How much turpentine overflows?
- based on a large 4 cm thick plate that is initially at a uniform temperature of 20°C that is heated by passing it through a space maintained at 500°C. The plate remains in the space for a period of 7 min. Take the heat transfer coefficient to be 120-W/m2°C. Example 4-4 [k = 110-W/m°C, r = 8530-kg/m³, C, = 0.380-kJ/kg°C, a = 33.9 x 10-6 m²/s] The dimensionless distance from center to a point 0.4-cm below the outer surface is 0.5 0.8 none of the above 0.2A long 20 cm diameter shaft made of stainless steel 304 comes out of an oven at a uniform temperature of 600°C. The shaft is then allowed to cool slowly in an environment at 200°C with an average heat transfer coefficient of h = 80 W/m².K. Determine [a] the temperature at the center of the shaft and [b] the temperature of the outer surface of the shaft 45 minutes after the start of the cooling Given: Find: Schematic: Assume: Property Data: k= 14.9 W/m°C p= 7900 kg/m³ Cp = 477 J/kg:K a= 3.95 x 10-6 m²/sA fabricated food, in the form of small spherical pellets, is to be frozen in an air-blast freezer. The air-blast freezer isoperating with air at -40°C. The initial product temperatureis 25°C. The pellets have a diameter of 0.5 cm, and the density of the product is 980 kg/m3. The initial freezing temperature is -2.5°C. The latent heat of fusion for this product is 280 kJ/kg. The thermal conductivity of the frozen productis 1.9 W/(m°C). The convective heat transfer coefficient is 50 W/(m2 °C). Calculate the freezing time.
- A long cylindrical rod has a 20-cm-diameter at a uniform temperature of 600°C. The rod is then allowed to cool slowly in a room at 200°C with a heat transfer coefficient of 80 W/m² °C. Calculate the temperature at the center of the rod 45 min after the start of the cooling process. Also, determine the heat transfer per unit length of the rod during this time period. Given: k=14.9 W/m.K, a = 3.95x10-6, m2/s p=7900 Kg/m3 Cp=0.477 KJ/Kg. °CQ2/ A 4-m-internal-diameter spherical tank made of 1.75-cm-thick stainless steel (k 15 W/m °C) is used to store iced water at 0°C. The tank is located in a room whose temperature is 35°C. The walls of the room are also at 35°C. The outer surface of the tank is black, and heat transfer between the outer surface of the tank and the surroundings is by natural convection and radiation. The convection heat transfer coefficients at the inner and the outer surfaces of the tank are 80 W/m2 °C and 10 W/m2· °C, respectively. Determine (a) the rate of heat transfer to the iced water in the tank and (b) the amount of ice at 0°C that melts during a l-h period. The heat of fusion of water at atmospheric pressure is hif 334 kJ/kg.A small copper wire with a diameter of 0.792 mm and initially at 366.5 K is suddenly immersed in a liquid held constant at 311 K. The convection coefficient h = 85.2 W/m2 · K. The physical properties can be assumed constant and are k = 374 W/m · K, cp = 0.389 kJ/kg · K, and ρ = 8890 kg/m3. Determine the time in seconds for the average temperature of the wire to drop to 338.8 K (one-half the initial temperature difference). Do the same but for h=11.36W/m2·K. Forpart(b),calculate the total amount of heat removed for a wire 1.0 m long.
- A 50 cm x 50 cm copper slab, 6 mm thick at a uniform temperature of 350°C suddenly has its surface temperature lowered to 30°C. Find the time at which the slab temperature becomes 100°C. h = 100 W/m2 °C. Also, find the rate of cooling after 60 seconds.A spherical pellet (ρ =1000 kg/m3 , c = 1000 J/(kg⋅K)) with a radius ro = 1 cm is cooled from an initial temperature of 200°C by immersion in water bath at 10°C with a convection coefficient h = 100 W/(m2 K). Evaluate the temperature in the center and on the surface of the pellet after 10 s of immersion for two cases: (a) Thermal conductivity of the pellet k = 0.1 W/(m⋅K) (b) Thermal conductivity of the pellet k = 5 W/(m⋅K)A cylinder made of silver with radius of 0.750 mm, 500 mm in length and initially at 455 K is suddenly immersed in a hot liquid at 955 K. The convection coefficient is 100 W/m2·K. Determine the time in seconds for the average temperature of the silver to reach 900 K. For silver, ρ = 10.49 g/cm3, k = 424 W/m·K, cp = 0.237 J/g·°C.