Answer and Explanation:
The answer is attached below
Answer:
Optimal aspect ratio = 1
Explanation:
From Chvorinov's Rule,
![T = c [\frac{volume}{surface are}]^n](https://tex.z-dn.net/?f=%20T%20%3D%20c%20%5B%5Cfrac%7Bvolume%7D%7Bsurface%20are%7D%5D%5En%20)
Where
T = solidification time
c = mold constant
For the riser to have the longest solidification time:
We have: D = h
![A = pi Dh[\frac{2pi D^2}{4}] = 1.5D^2 pi](https://tex.z-dn.net/?f=%20A%20%3D%20pi%20Dh%5B%5Cfrac%7B2pi%20D%5E2%7D%7B4%7D%5D%20%3D%201.5D%5E2%20pi)
Therefore,
To have to longest solidification time, D = h
Therefore the best aspect ratio would be,
Different communities will have a demand for different careers. Areas with a large number of school will have a higher demand for teachers. The community needs professors, pays them well, you might decide to choose that path
Answer and Explanation:
Dead state can be defined as the state in which both the are ambient properties and the system properties are coincident to each other.
Since the surroundings are similar and these surroundings are fixed also, there will be no kinetic energy and also the gravitational potential energy for both the systems is also equal.
Practically, in thermodynamic studies, the Gravitational potential energy of the system is negligible. This state holds significance because it leads to the termination of all the processes that are spontaneous in nature.
I think the answer to this question is b but I’m not sure
