Answer:
The diffusion coefficients for iron in nickel are given at two temperatures:
T (K) 1273 1473
D (
/s) 9.4 ×
2.4 × 
(a) Determine the values of Do and the activation energy Qd.
(b) What is the magnitude of D at 1100°C (1373 K)?
<em>A </em>
<em>The pre-exponential factor Do = 2.1 x </em>
<em></em>
<em>The activation energy Qd = 252,609 J/mol</em>
<em>B</em>
<em>The diffusion coefficient D= 5.14 x </em>
<em></em>
Explanation:
The full explanation is contained in the attached images;
Answer:
0.948 Btu
Explanation:
1 Btu = 1055 J so
= 0.948 Btu
Umm the Water cycle sorry I’m trying
Answer:
Cut off ratio=2.38
Explanation:
Given that




Lets take
is the temperature at the end of compression process
For air γ=1.4



At constant pressure



So cut off ratio

Cut off ratio=2.38