An aluminum alloy sphere 10cm in diameter has a uniform temperature of 200°C after being removed from a hot oven. The aluminum sphere is then left in a cold room of 15°C and being blown by forced air. The convection heat transfer coefficient from the air flow is assumed to be h = 500 W/m²K Use the following properties to solve the problem: k = 163 W/mK, p = 2810 kg/m³, Cp = 880J/kg°C. a. Using Lump Model, determine the temperature of the sphere after 2 minutes. b. Determine the required convective heat transfer (h) to cool the sphere from 200°C to 80°C in 3 minutes.

Q: (a) Write short notes about the following as they are applied in fluid mechanics (i) Uniform flow…

A: We will answer the question number (a) since the exact one was not specified. Please submit a new…

Q: 5. What is the minimum diameter at section (1) in the pipe below to avoid cavitation at that…

A: Given   Diameter, D2 = 15 cm         Height, h = 5 m Find   Minimum diameter, d

Q: locate the X-X and Y-Y centroidal axes for the areas shown.

A:

Q: The 45-mm solid shaft has an allowable shear stress of  τallow= 65 MPa. The torsional loadings…

A:

Q: A brine solution is heated from 50°F to 90°F in a one shell pass (hot water)-two tube pass (brine)…

A: Given : Tci = 500 F Tco = 90o F Thi = 1300 F Tho = 100o F m = 0.6 kg/s = 1.322 lb/s U = 180 Btu/h…

Q: The 15-kg uniform slender rod is suspended at rest when the force of F = 145 N is applied to its…

A: Given data:- length of the rod (L)=3 m mass of the rod (m) =15 kg force applied (F) =145 N Angle…

Q: Q3: Two material were tested in tension, the first is aluminum alloy has stress-strain curve define…

A:

Q: 4. A standard brick (dimensions 200mm x 100mm x 65mm) is compressed lengthwise by a force P as…

A:

Q: 3. Find the young's modulus of a bars a rod of diameter 25 mm and of length 250 mm which is…

A: Givend=25mmL=250mmP=50kN∆=0.3mmif E=2×105  N/mm2

Q: For the composite cylinder shown in Fig. 5.25, what thick-ness of brass is required to cause the…

A:

Q: etermine the fillet weld size required if #70 e

A: Given   Load, Pu = 36 k Height, h = 8 in Find   Weld size, t

Q: shell and tube heat exchanger is operated in countercurrent mode.  The tube side (hot fluid) enters…

A:

Q: IBL, Flat Plate. Apply the integral boundary layer analysis to a flat plate turbulent flow as…

A: To find: The expression of δx, total drag coefficient and the drag coefficient at IBL, Smooth and…

Q: PROBLEM 4 The cylinders in the figure are at rest and have the indicated weights of 500 lbs and 250…

A: Given,

Q: 5. Calculate Phki for the (100), (110), and (111) planes of a monoatomic fcc crystal.

A: The given planes are (1 0 0), (1 1 0) and (1 1 1) and the crystal is FCC crystal

Q: Rankin cycle. leaves steam generator at 1500 lbf/in^2 and 1095F. se of heat transfer and friction,…

A: To-Determine:- a. Mass Flow rate of steamb. Rate of heat transferc. % thermal efficiencyd. Mass flow…

Q: How many zero-force members we have in the following structure? B F A a. 2 b. 3 Oc.1 Od.4 C D E 10…

A:

Q: For the beam and loading shown, determine the deflection at point C. Use E= 200 GPa. It is given…

A:

Q: Problem 1 For the beams shown below, derive the expression for shear (V) and moment (M) and draw the…

A:

Q: 3.3 b) 8.12 c)6.67 d)0.33 3: The force-displacement relationship of a spring-mas wstem is given by…

A: The force-displacement of spring-mass system is given by  F(x)=30x-10x2 The mass of the system is…

Q: A static thrust stands as it showed in the Figure. The intake velocity is 200 m/s, exhaust velocity…

A: Given data:-  The intake velocity = 200 m/s, exhaust velocity=500 m/s, intake cross-section area =1…

Q: Consider the area shown in (Figure 1). Suppose that a = 2.4 in., b = 4.8 in., c = 1.6 in.

A:

Q: A steady-state system for producing power consist of a pump, heat exchanger and a turbine. Water at…

A:

Q: A computer lab filled with 20 computers and 15 students is cooled by an air conditioning unit on a…

A: The heat generated by an average student is 90 W. The heat generated by a computer is 150 W. The…

Q: Determine the components of the reactions at A and E, (a) if a 760-N load is applied as shown at C,…

A:

Q: The dimensions of the four bar mechanism of P1ABP2 as follows: P1A=300mm; AB=580mm; P2B=360mm; and…

A:

Q: 0.5 m 0.5 m 8 kN 3 m B 0.5 m A -1.5 m- 6 kN 5 kN

A: Given data:- system of force on a given configuration To find:- Free body diagram of the system…

Q: A=3 rad/s 5 in. 4 in. 30º 8 in.

A: Given,

Q: From the given truss below, determine the forces for the members IK, IJ, and HJ. And also determine…

A:

Q: Air, 5.37 kg, is compressed in a piston‑cylinder device from 91.3 kPa and 65.3 ∘C to 195.2 kPa in an…

A:

Q: which is 1 m above point C, by a 20 mm diameter bolt. If a load P = 15 kN acts horizontally at D,…

A:

Q: REFRIGERANT 134 a Ask 3 : HEAT EXCHANGER AIR GIVEN : KINETIC ENERGY STEADY STATE 2 AIR > 4…

A: Given:Inlet air condition, P1= 1 Bar, T1=89.6o F, AV1=1 m3/sOutlet air condition, P2=0.95 Bar,…

Q: For the 180° elbow and nozzle flow shown in the figure below, (a) determine the loss in available…

A:

Q: A cargo ship has a mass of 1500 tonnes and floats on seawater. Given that seawater has a relative…

A:

Q: Determine the displacements x1(t) and x2(t) in the figure m₂ m₂ k₂ x(1) X₂ (1)

A: To find: The displacement value of x1(t) and x2(t) Given: The value of force, F1 = 10.cos(w.t) The…

Q: Discuss the criteria of gear fault detection using vibration analysis.

A: gears are used in the wide range of the mechanical equipments. These are used in the machines,…

Q: Oxygen in a tank has an absolute pressure of 130 kPa. Determine the pressure head in mm of…

A:

Q: The spool has a mass of 150 kg and a radius of gyration of kg = 0.3 m. (Figure 1) Figure 250 mm 400…

A:

Q: 3. Find the young's modulus of a bars a rod of diameter 25 mm and of length 250 mm which is…

A:

Q: A 80 cm tall cylinder is filled with water (ρwater = 1000 kg/m3) and oil (ρoil = 600 kg/m3) and is…

A: To find:  The pressure at the bottom. Given: The height of the cylinder is h=80 cm1 m100 cm=0.8 m.…

Q: 1.Equivalent resisitance through entire system 2.Current being drawn from battery 3.Current…

A: 1) Equivalent resistance of circuit, R=R1R2R1+R2 2) Current drawn from battery,…

Q: If a strengths-of-materials analysis determines the maximum torque that can be applied to a shaft is…

A:

Q: = 4. 4) The hydraulic cylinder D extends, moves the rigid rod ABC, and causes the collar A to move…

A:

Q: A cantilever beam is subjected to a concentrated load of 2000N. The cross sectional dimensions of…

A:

Q: 1.6-5 Three pieces of wood are glued together and to rigid supports (see figure on page 44). A force…

A: Given:Force acting on the blocks, F=14 kNLength of the block, l=150 mmwidth of the blocks, w=90…

Q: 1. Determine the speed of block 'D' if end ‘A’ of the rope is pulled down with a speed of 3m/s.

A:

Q: 15. A brass condenser tube 1.0 in. in diameter and 4 ft long has a wall thickness of 0.065 in. What…

A: Given:  d = 1 in L = 4 ft = 48 in  t = 0.065 in Apparent factor of safety = 10 Collapsing pressure =…

Q: 4. (Kittel 7.14) Two orbital boson system. Consider a system of N bosons of spin zero, with orbitals…

A: Given data: N>>1

Q: |F₁ = 200 N 30% 40° F₂ = 300 N

A: Given,

Q: 9. A pressure of 1.013×10 N/m² is applied to a volume of 15.0 m' of water. If the bulk modulus of…

A:

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.