Air usually constitutes up to half of the volume ofcommercial ice creams and takes the form of smallspherical bubbles interspersed within a matrix of frozenmatter. The thermal conductivity of ice cream that containsno air is k na = 1.1 W/m ⋅ K at T = − 20 ° C . Determinethe thermal conductivity of commercial ice creamcharacterized by ε = 0.20 , also at T = − 20 ° C .
Air usually constitutes up to half of the volume ofcommercial ice creams and takes the form of smallspherical bubbles interspersed within a matrix of frozenmatter. The thermal conductivity of ice cream that containsno air is k na = 1.1 W/m ⋅ K at T = − 20 ° C . Determinethe thermal conductivity of commercial ice creamcharacterized by ε = 0.20 , also at T = − 20 ° C .
Air usually constitutes up to half of the volume ofcommercial ice creams and takes the form of smallspherical bubbles interspersed within a matrix of frozenmatter. The thermal conductivity of ice cream that containsno air is
k
na
=
1.1
W/m
⋅
K
at
T
=
−
20
°
C
.
Determinethe thermal conductivity of commercial ice creamcharacterized by
ε
=
0.20
,
also at
T
=
−
20
°
C
.
PROBLEM 3.46
The solid cylindrical rod BC of length L = 600
mm is attached to the rigid lever AB of length a
= 380 mm and to the support at C. When a 500
N force P is applied at A, design specifications
require that the displacement of A not exceed
25 mm when a 500 N force P is applied at A
For the material indicated determine the
required diameter of the rod.
Aluminium: Tall = 65 MPa, G = 27 GPa.
A
Find the equivalent mass of the rocker arm assembly with respect to the x coordinate.
k₁
mi
m2
k₁
2. Figure below shows a U-tube manometer open at both ends and containing a column of liquid
mercury of length l and specific weight y. Considering a small displacement x of the manometer
meniscus from its equilibrium position (or datum), determine the equivalent spring constant associated
with the restoring force.
Datum
Area, A
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