Maurice Tutor

(5)

$15/per page/Negotiable

About Maurice Tutor

Levels Tought:
Elementary,Middle School,High School,College,University,PHD

Expertise:
Algebra,Applied Sciences See all
Algebra,Applied Sciences,Biology,Calculus,Chemistry,Economics,English,Essay writing,Geography,Geology,Health & Medical,Physics,Science Hide all
Teaching Since: May 2017
Last Sign in: 398 Weeks Ago, 2 Days Ago
Questions Answered: 66690
Tutorials Posted: 66688

Education

  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

Experience

  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 29 Jan 2018 My Price 7.00

criti- cal insulation radius

3.66   In Example 3.6, an expression was derived for the criti- cal insulation radius of an insulated, cylindrical tube.

 

 

 

 

Derive the expression that would be appropriate for an insulated sphere.

3.67    A hollow aluminum sphere, with an electrical heater in the center, is used in tests to determine the thermal con- ductivity of insulating materials. The inner and outer radii of the sphere are 0.15 and 0.18 m, respectively, and testing is done under steady-state conditions with the inner surface of the aluminum maintained at 250°C. In a particular test, a spherical shell of insulation is cast on the outer surface of the sphere to a thickness of

0.12 m. The system is in a room for which the air tem- perature is 20°C and the convection coefficient at the outer surface of the insulation is 30 W/m2 · K. If 80 W are dissipated by the heater under steady-state condi- tions, what is the thermal conductivity of the insulation?

Answers

Maurice Tutor
(5)
Status NEW Posted 29 Jan 2018 01:01 AM My Price 7.00

Hel-----------lo -----------Sir-----------/Ma-----------dam-----------Tha-----------nk -----------You----------- fo-----------r u-----------sin-----------g o-----------ur -----------web-----------sit-----------e a-----------nd -----------acq-----------uis-----------iti-----------on -----------of -----------my -----------pos-----------ted----------- so-----------lut-----------ion-----------.Pl-----------eas-----------e p-----------ing----------- me----------- on-----------cha-----------t I----------- am----------- on-----------lin-----------e o-----------r i-----------nbo-----------x m-----------e a----------- me-----------ssa-----------ge -----------I w-----------ill----------- be-----------

Not Rated(0)