Q2/ An aluminum sphere weighting 7kg and initially at a temperature of 533K is suddenly immersed in a fluid at 283K. if heat transfer coefficient between the sphere and fluid is 50W/m?.°C. Take density-2707kg/m3, specific heat-0.9KJ/kg.°C and thermal conductivity= 204W/m °C.
Q: Q1. Find the heat flow rate through the composite wall as shown in Fig. below. Assume one…
A: Given: The Thermal conductivity of layer A, KA = 152 W/moC The Thermal conductivity of layer B, KB =…
Q: 4. Hot exhaust gases flow through a pipe as shown below. Assume the process is steady state and use…
A:
Q: On a hot summer's day concrete highway reach to temperature of 55°C. Suppose that a stream of water…
A: The answer is given below
Q: A steam pipe carrying steam at 380 kPa pressure for a distance of 120 m in a chemical plant is not…
A:
Q: A thin square plate is heated to a temperature of 80°C and then quickly submerged in a water bath at…
A:
Q: - R1 = 7.6 mm - Thickness "S" k2 R2 Air R1 T = V= m/s =R2-R1=3.6 - velocity V= 8.82 m/s kl "gen Air…
A:
Q: Find the cross-sectional-area of a hole in a tank (volume 0.034 m, the rate change of density = 2.5…
A:
Q: You have mounted 100W PCBs as vertical fins. The fins are 60mm deep x 60mm high x 1mm thick and…
A: Given: k = 0.025 W/mK Pr = 0.72 v = 1.847 x 10−5u = 16.84 x 10−6 p = 1.2 kg/m3B = 1Tf (ideal…
Q: Subject: Thermodynamics An air bubble rises from the bottom pf a water storage tank. The…
A:
Q: A 10 kg axial load is uniformly carried by an aluminum alloy pipe with an outside diameter of 10 cm…
A: Write the formula for axial stress in the pipe. σ=PA Here, σ is the axial stress in the pipe, P is…
Q: 3.20. A uniform slender rod of mass m and length / is hinged at point O. The rod is attached to two…
A:
Q: QI/ A fluid containing (water, oil, air) flowing through the tube and open to the atmosphere as…
A: From Pascal's law Start from Pa pressure will be add when going downward and will subtract when…
Q: A water tank is completely filled with liquid water at 20°C. The tank material is such that it can…
A:
Q: 6. A particle undergoing projectile motion if you consider the air resistance (Fres-kmu) where k =…
A: Given data: Air resistance = Fres = - k m v where k = 0.04 s-1 Angle of elevation of projectile…
Q: A vertical cooling fin approximates a flat plate 800 mm in height is.exposed to saturated steam at…
A: Given: A vertical cooling fin approximates a flat plate of x=800 mm. The temperature of saturated…
Q: Find the minimum amount of diameter for the insulation of a spherical water tank? Radius of the tank…
A: Given Data The radius of the tank, 10m Thermal conductivity, k=25W/m2K convective coefficient is 5…
Q: A closed heavy steel chamber is filled with water at 10°C and at atmospheric pressure. If the…
A: Given: Let us consider the given data, Initial temperature, T1=10°C New temperature, T2=40°C+273 To…
Q: f(h,p,D,V, µ, Cp, k) k = thermal conductivity (W/m°C) h = convective heat transfer coefficient…
A:
Q: Q1. Find the heat flow rate through the composite wall as shown in Fig. bele Assume one dimensional…
A: Given Data KA=152 W/m°C KB=31W/m°C KC=68 W/m°C KD=53 W/m°C Now LA=3 cm=0.03 mLB=LC=8 cm=0.08…
Q: Mass flow rate of hot fluid is 0.007 kg/s. Convection heat transfer coefficient of hot fluid stream…
A:
Q: Find the height of a chimney to get net draught of 13 mm, temperature of chimney gases 320°C,…
A: Height of Chimney is 24.07 m.
Q: Find the air horsepower of an industrial fan that delivers 26 cu.m/s of air through a 1 m x 1.2 m…
A: Q=26 m3/scross section Area=1×1.2m2Pressure head=127mmAir temp=1.1649 kg/m3Air horse power=?
Q: In Tinyland, houses are less than a foot high! The rainfall is laminar! The drainpipe, as shown in…
A:
Q: Q1. Find the heat flow rate through the composite wall as shown in Fig. below. Assume one…
A: Given: The width of each layer, b = 10 cm The thermal conductivity of layer A, KA = 152 W/moC The…
Q: To cool a piece of glass, initially at a temperature of 93°C, it is immersed in an aluminum tray,…
A: Given data: Initial temperature of the glass piece = 93°C Initial temperature of…
Q: It is important for the body to be able to cool itself even during moderate exercise. Suppose a 70kg…
A:
Q: -5 2 Air stream k = 0.02439 W/m.K, v 1.426 x10 m /s, Pr = 0.7336) flows over a flat surface [L= 4.5…
A:
Q: 7. Determine the heat loss through a ventilated attic under the following conditions: indoor…
A:
Q: Water at 100°C flows in a aluminum pipe with a distance 10m (0.1m inside diameter, 0.02m thick, k=…
A: 
Q: Magnolia Dairy Products plant must cool 4000 gallons of fresnmilk received from the farm per day…
A: As per given Plant cooled=4000 gallon Spefic gravity =0.935 Temperature difference =80 to 38 °F…
Q: 3. (a) What is the physical interpretation of the Grashof number? (b) A glass-door firescreen, used…
A: 3- a) grashoff no. is defined as the ratio of the buoyancy force to the viscous force. Like in…
Q: Mass flow rate of hot fluid is 0.007 kg/s. Convection heat transfer coefficient of hot fluid stream…
A: GIVEN :- mh.=0.07 kg/smc.=0.0025 kg/sThi=65°CT=25°C
Q: i need the solution of the tow questions 1- consider two system , A1 and A2 , , find the…
A: RELATIONSHIP BETWEEN THERMODYNAMICS PROBABILITY AND STATISTICAL MECHANICS: Thermodynamics…
Q: While the stiffness of an elastic cord can be quite constant (i.e., the force versus displace- ment…
A:
Q: W Data Input • A homogeneous body, of weight W = 12 N and of length /= 1 kg m, is kept in balance by…
A:
Q: A flat plate of length 0.3 m is maintained at a temperature of 42°C. A stream of water 6.62, v=…
A: given; ⇒length of flate plate(l)=0.3m⇒temperature of plate(T1)=420c⇒Pr=6.62⇒kinematic…
Q: (a) What is the physical interpretation of the Grashof number? (b) A glass-door firescreen, used to…
A:
Q: Temperature differences for Thermal efficiencies do not have to be converted to absolute…
A: If the thermal efficiencies of a cycle is expressed in terms of temperature difference, then it is…
Q: Required information A smooth steel (SG = 7.86) sphere is immersed in a stream of ethanol at 20°C…
A: GivenD=0.5 cm=0.005 mCD=0.4
Q: An experiment is conducted on the surface of the planet Mars. Assume an isothermal atmosphere, where…
A:
Q: Hydrodynamics pumps 4. A system at sea level has the following conditions: water temperature:…
A: Given:T=70°CSuction head loss,hL=0.575 mSuction lift,hs=3.0 mAt 70°C:saturation pressure of…
Q: 9. Water is heated by a 200 mm by 200 mm vertical flat plate which is maintained at 60°C. Find the…
A:
Q: A clean tube has 0.3 cm internal diameter, and it was immersed in a liquid with a surface tension…
A: Given Data Internal diameter of the tube, d=0.3 cm OR 0.003 m density of the liquid, ρ=13.6 g/cm3…
Q: (1) A copper wire 0.8 mm diameter at 150°C is suddenly dipped into water at 35°C. If h=85.5 W/m²K,…
A:
Q: 1. The wind turbine gives the following data: Blade length, 1- 52 m, Wind speed, v= 12 m/s, Air…
A:
Q: The bottom quarter of a vertical cylindrical tank of total height 0.4 m and diameter is filled with…
A:
Q: For atmospheric pressure above the sliding block of 10 kg mass, find the gauge pressure in the pipe…
A: The simplest form of manometer consists of a U-shaped glass tube containing liquid. It is used to…
Q: (c) A hot flexible aluminium alloy string [coefficient of thermal expansion, [a, = 23.6x10“(°C)',…
A:
Q: A cylindrical tank (1.20m in diameter) contains two liquids with the follow specific gravities:…
A: We will first convert the total height of both the fluids in the container in terms of height of the…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- Q2/ An aluminum sphere weighting 7kg and initially at a temperature of 533K is suddenly immersed in a fluid at 283K. if heat transfer coefficient between the sphere and fluid is 50W/m?.°C. Take density=2707kg/m3, specific heat=0.9KJ/kg.°C and thermal conductivity= 204W/m °C. إجابت * Determine the Bi number 0.00696 0.000696 0.0052 0.00052 0 أخری *.Determine the time required to cool sphere to 263K 26.28min 262.8min 52.56 min 525.6 min O أخریQ2:- A sphere made of pure copper, which is 13 mm in diameter, is 70 °C (at t=0) when it inserted into a gas having a temperature of 25 °C. After 65 s the temperature of the sphere reach 60 °C. Make the appropriate assumption to find the heat transfer coefficient of the gas. What is the temperature of the sphere after 80 s. (A;=TT D2, V= TT D³/6, Lc=V/ A,)Q2/ An aluminum sphere weighting 7kg and initially at a temperature of 533K is suddenly immersed in a fluid at 283K. if heat transfer coefficient between the sphere and fluid is 50W/m?.°C. Take density=2707kg/m3, specific heat=0.9KJ/kg.ºC and thermal conductivity= 204W/m°C. Determine th Bi number and And determine the time required to cool sphere to 263k
- LTE !!:: خاص A docs.google.com Q2/ An aluminum sphere weighting 7kg and initially at a temperature of 533K is suddenly immersed in a fluid at 283K. if heat transfer coefficient between the sphere and fluid is 50W/m?.°C. Take density=2707kg/m3, specific heat=0.9KJ/kg.°C and thermal conductivity= 204W/m °C. Your answer Determine the Bi number 0.00696 0.000696 0.0052 0.00052 Other: Determine the time required to cool sphere to 263K. * 26.28min 262.8min 52.56 min 525.6 min Other: 2 Request edit access SubmitAir surrounding a light bulb is moving at 25 m/sec. The surrounding conditions are kept at atmospheric pressure and at temperature 25o C. The light bulb external surface is kept at 140o C. What is the heat transfer rate from the light bulb to the surrounding? Assume the light bulb as a sphere with a diameter of 50 mm.Q3) A thermometer having a surface emissivity of 0.85 is placed in an air space in a metal-walled building, the walls of which may attain a temperature of -10°C during winter climate conditions. The convection coefficient between the thermometer and the surrounding air is estimated as h = 10W/m2. C. If the thermometer indicates a temperature of 17°C, estimate the true air temperature in the building.
- A large 100-mm thick steel plate is initially at uniform temperature T = 180°C at time t = 0. Both sides of the plate are exposed to 30°C oil with convection coefficient h = 1500 W/m².K. The thermal conductivity, heat capacity, and density of the steel are k = 38 W/m-K, cp = 485 J/kg-K, and p = 7800 kg/m³. a) Find the temperature at the center of the slab when t = 125 s. b) Find the temperature at the surface of the slab when t=125 s.A solid hemisphere of radius 5 cm to be cooled in air (at 20 o C, h=10 W/m 2 .K) from 200 oC to center of 150 oC, assume following sphere properties ρ=8500kg/m3, k=20W/m.K , C=400 J/kg.Ka. List assumptions and justify selected method of solution b. How long does it take to cool the hemisphere? c. What is the temperature of the surface at end of cooling?How long should it take to boil an egg? Model the egg as a sphere with radius of 2.3 cm that has properties similar to water with a density of = 1000 kg/m3 and thermal conductivity of k = 0.606 Watts/(mC) and specific heat of c = 4182 J/(kg C). Suppose that an egg is fully cooked when the temperature at the center reaches 70 C. Initially the egg is taken out of the fridge at 4 C and placed in the boiling water at 100 C. Since the egg shell is very thin assume that it quickly reaches a temperature of 100 C. The protein in the egg effectively immobilizes the water so the heat conduction is purely conduction (no convection). Plot the temperature of the egg over time and use the data tooltip in MATLAB to make your conclusion on the time it takes to cook the egg in minutes.
- Answer this ASAP The diameter of the tube is 25 mm. The specific heat of water is 4.18 kJ/kg.°C. The overall heat transfer coefficient is 0.7 kW/m².°C. 1. Schematic of temperature distribution 2.ΔTLMTD 3.Actual heat transfer rate 4.Cmin 5.Maximum heat transfer rateConduction 1. A thermodynamic analysis of a proposed Brayton cycle gas turbine yields P= 5 MW of net power production. The compressor, at an average temperature of T. = 400°C, is driven by the turbine at an average temperature of T₁ = 1000°C by way of an L = 1m-long, d= 70mm - diameter shaft of thermal conductivity k = 40 W/m K. Compressor min T Combustion chamber Shaft L Turbine Th out (a) Compare the steady-state conduction rate through the shaft connecting the hot turbine to the warm compressor to the net power predicted by the thermodynamics- based analysis. (b) A research team proposes to scale down the gas turbine of part (a), keeping all dimensions in the same proportions. The team assumes that the same hot and cold temperatures exist as in part (a) and that the net power output of the gas turbine is proportional to the overall volume of the device. Plot the ratio of the conduction through the shaft to the net power output of the turbine over the range 0.005 m s Ls 1 m. Is a…under steady-state conditions. If you are given T1 = 200 °C and T2 = 164 °C, determine: a) the conduction heat flux, q,.cond, in m2 W from x = 0 to x = L b) if the dimensions of the triangle ares 15 mm and h 13 mm, calculate the heat transfer due to convection, q,y, in W at x = L Finsulation T2 T T = 20°C h = 500 W/m2.K Triangular Prism x L x 0 L= 50 mm k = 100 W/m-K