Consider a large plate of thickness 50 mm and
thermal conductivity of k= 69 W/m.C in
which heat is generated uniformly at a constant rate of 600
kW/m3. One side of the plate is insulated while
the other side is subjected to convection to the environment at
30oC with a heat transfer coefficient
of h= 94 W/m^2.C. considering six equal
spaced nodes with a nodal spacing of 10 mm:
(a) obtain the Finite Difference
formulation of this problem,
(b) determine...
A plane wall has thickness of 5 cm, thermal conductivity of 2
W/mK and generates heat. The left face of the wall (x=0) has a
surface temp. of 80C and has air at 20C flowing past it with a heat
transfer coefficient of 50 W/m^2K. If the right face is insulated
then the temperature distribution through the wall has a general
format T(x)=A+B*x+C*x^2
(a) Draw a properly labeled diagram (including a representative
temperature distribution), state all assumptions and calculate the...
) Consider a 1.5-m-high and 3-m-wide glass
window whose thickness is 6 mm and thermal conductivity is k = 0.88
W/m · °C. Determine the steady rate of heat transfer through this
glass window and the temperature of its inner surface for a day
during which the room is maintained at 27°C while the temperature
of the outdoors is -7°C. Take the convection heat transfer
coefficients on the inner and outer surfaces of the window to be
h1= 11 W/m2...
1. Why is the conductivity of metal different from the
insulator? - How different is the semiconductor from them?
2. What is the main cause of the energy gap? How is it related
to the Bragg condition.
3. How is Bloch function different from the general
wavefunction?
1. What are the SI units of conductivity? a. What is the conductivity of deionized water? b. What is the conductivity of tap water? c. What is the conductivity of sea water? 2. What does the conductivity of a solution indicate? 3. How many milliliters of concentrated sulfuric acid are needed to make up 1.00 liter of 0.080 M sulfuric acid? (Note: a volumetric flask is employed for the dilution.) 4. How many grams of Ba(OH)-8H,O are needed to make up 1.00 liter of 0.010 M...
Anatomy absorbs x-rays based on the density of the
structure (subject thickness). Considering your understanding of
how black, grey, clear and white tones (radiolucent and radiopaque)
are created on an x-ray film, Why do some anatomical structures
appear black, and others clear or white? Why do some structures
allow more x-rays to pass through and energize the film crystals,
while others do not?