An ordinary egg can be approximated as a 5.5-cm-diameter sphere whose thermal conductivity of roughly W } mk k = 0.6 overall density of p = 1000 kg and heat capacity of C₂ = m² = 90°C The egg is initially at a uniform temperature of T₁ = 10°C and is dropped into boiling water at T Taking the convective heat transfer coefficient to be h = 10- -determine how long it will take for the egg to W m²K reach T = 70°C. In solving this problem, please use the lump model method (ignoring the requirement of small Biot number and discuss the outcomes, In solving the problem, please follow the steps below. For the Lump Model 3000 = 3000K 1. Compute the volume and surface area of the sphere (as the egg model) 2. Compute the characteristic length Lc Vol As 3. Compute the diffusivity a = k PCp =

a 2cm diameter copper meltallic element at an initial uniform temperature of 60 C is submerged in 20c water. The temp of the sphere after 20 seconds is 31c. Determine the average heat transfer coefficient. write assumptions.

Q1: A vertical plate 350mm high and 240mmwide, at 40°C, is exposed to saturated steam at 1 atm. Calculate the: 1- Film thickness at the bottom of the plate. 2- Maximum velocity at the bottom of the plate. 3- Total heat flux to the plate. 103) The properties of steam and the condensate [hfg = 2257 x , kg µ = 406 x 10-6 kg/m.s,p = 977.8 kg/m³,kf = 0.668 W /m. k]. %3D

A water tank is completely filled with liquid water at 40°C. The tank material is such that it can withstand tension caused by a volume expansion of 5 percent. Determine the maximum temperature rise allowed without jeopardizing safety. Assume a volume expansion coefficient value at that of 65 °C. (Just write the numerical answer. Include - if the answer is negative. No need to put the unit.) Properties of saturated water Volume Specific Heat Jkg - K Thermal Conductivity k, Wim- K Prandti Enthalpy Dynamic Viscosity H. kg/m -s Expansion Coefficient Number Density P. kgim Saturation of Pr Temp. T, "C B. 1/K Liquid Pressure Vaporization P, kPa Liquid Vapor hg, k/kg Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor 0.0171 1.792 x 103 0.0173 0.922 x 105 13.5 0.934 x 10-5 1.00 -0.068 x 10 3 1.00 1.00 0.01 0.6113 999.8 0.8721 0.0048 0.0068 2501 2490 2478 4217 4205 1854 0.561 0.571 1.519 x 10-3 1.307 x 10-3 0.946 x 10-5 1.138 x 10 3 0.959 x 10-5 1.002 x 10 3 0.973 x 105 999.9 1857 11.2 0.015…

This is a question from my problem sheet with the answers. i dont understand how to answer this question. Please use this book for the values: Thermodynamic and Transport Properties of Fluids by Rogersand Mayhew.

Need help I'm not sure where I went wrong on this

What’s the correct answer for this please ?

I need the answer as soon as possible

a) First, let's start with the steady-state analysis for the cable. What is the steady-state temperature of the wire surface if this current has been passing through the cable for a long period of time in these underwater conditions? Enter only a numeric value (with no units entered) and express your answer in ∘C. b) Now, let's think about the transient case. Assume that the cable starts at the same uniform temperature as the water and then the electrical current is passed through the cable. We're now interested in the amount of time it takes to heat up. Start by calculating the Biot number for this scenario. Enter only a numeric value (your answer should be unitless).  c)

A water tank is completely filled with liquid water at 40°C. The tank material is such that it can withstand tension caused by a volume expansion of 5 percent. Determine the maximum temperature rise allowed without jeopardizing safety. Assume a volume expansion coefficient value at that of 65 °C. (Just write the numerical answer. Include - if the answer is negative. No need to put the unit.) Properties of saturated water Volume Specific Нeat Thermal Prandti Enthalpy Density P. kg/m Expansion Coefficient B, 1/K Liquid Conductivity k, W/m - K Dynamic Viscosity Number Saturation of G, J/kg K H. kg/m - s Pr Temp. T. °C Pressure Vaporization Pat, kPa Liquid Vapor hig, kJ/kg Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor 2501 2490 2478 0.561 0.571 0.580 1.792 x 10-3 1.519 x 10-3 1.307 x 10-3 1.138 x 10-3 1.002 x 10-3 0.922 x 10-5 0.934 x 10-5 0.946 x 10-5 0.959 x 10-5 0.973 x 10-5 0.6113 1854 0.0171 0.0173 999.8 0.0048 -0.068 x 10 3 4217 4205 13.5 11.2 0.01 1.00 0.0068 0.0094 0.0128…