Answer:
They communicate ideas very quickly.
Explanation:
Answer:
1. ![\dot Q=19600\ W](https://tex.z-dn.net/?f=%5Cdot%20Q%3D19600%5C%20W)
2. ![\dot Q=120\ W](https://tex.z-dn.net/?f=%5Cdot%20Q%3D120%5C%20W)
Explanation:
1.
Given:
- height of the window pane,
![h=2\ m](https://tex.z-dn.net/?f=h%3D2%5C%20m)
- width of the window pane,
![w=1\ m](https://tex.z-dn.net/?f=w%3D1%5C%20m)
- thickness of the pane,
![t=5\ mm= 0.005\ m](https://tex.z-dn.net/?f=t%3D5%5C%20mm%3D%200.005%5C%20m)
- thermal conductivity of the glass pane,
![k_g=1.4\ W.m^{-1}.K^{-1}](https://tex.z-dn.net/?f=k_g%3D1.4%5C%20W.m%5E%7B-1%7D.K%5E%7B-1%7D)
- temperature of the inner surface,
![T_i=15^{\circ}C](https://tex.z-dn.net/?f=T_i%3D15%5E%7B%5Ccirc%7DC)
- temperature of the outer surface,
![T_o=-20^{\circ}C](https://tex.z-dn.net/?f=T_o%3D-20%5E%7B%5Ccirc%7DC)
<u>According to the Fourier's law the rate of heat transfer is given as:</u>
![\dot Q=k_g.A.\frac{dT}{dx}](https://tex.z-dn.net/?f=%5Cdot%20Q%3Dk_g.A.%5Cfrac%7BdT%7D%7Bdx%7D)
here:
A = area through which the heat transfer occurs = ![2\times 1=2\ m^2](https://tex.z-dn.net/?f=2%5Ctimes%201%3D2%5C%20m%5E2)
dT = temperature difference across the thickness of the surface = ![35^{\circ}C](https://tex.z-dn.net/?f=35%5E%7B%5Ccirc%7DC)
dx = t = thickness normal to the surface = ![0.005\ m](https://tex.z-dn.net/?f=0.005%5C%20m)
![\dot Q=1.4\times 2\times \frac{35}{0.005}](https://tex.z-dn.net/?f=%5Cdot%20Q%3D1.4%5Ctimes%202%5Ctimes%20%5Cfrac%7B35%7D%7B0.005%7D)
![\dot Q=19600\ W](https://tex.z-dn.net/?f=%5Cdot%20Q%3D19600%5C%20W)
2.
- air spacing between two glass panes,
![dx=0.01\ m](https://tex.z-dn.net/?f=dx%3D0.01%5C%20m)
- area of each glass pane,
![A=2\times 1=2\ m^2](https://tex.z-dn.net/?f=A%3D2%5Ctimes%201%3D2%5C%20m%5E2)
- thermal conductivity of air,
![k_a=0.024\ W.m^{-1}.K^{-1}](https://tex.z-dn.net/?f=k_a%3D0.024%5C%20W.m%5E%7B-1%7D.K%5E%7B-1%7D)
- temperature difference between the surfaces,
![dT=25^{\circ}C](https://tex.z-dn.net/?f=dT%3D25%5E%7B%5Ccirc%7DC)
<u>Assuming layered transfer of heat through the air and the air between the glasses is always still:</u>
![\dot Q=k_a.A.\frac{dT}{dx}](https://tex.z-dn.net/?f=%5Cdot%20Q%3Dk_a.A.%5Cfrac%7BdT%7D%7Bdx%7D)
![\dot Q=0.024\times 2\times \frac{25}{0.01}](https://tex.z-dn.net/?f=%5Cdot%20Q%3D0.024%5Ctimes%202%5Ctimes%20%5Cfrac%7B25%7D%7B0.01%7D)
![\dot Q=120\ W](https://tex.z-dn.net/?f=%5Cdot%20Q%3D120%5C%20W)
Answer:
Most hydraulic systems develops pressure surges that may surpass settings valve. by exposing the hose surge to pressure above the maximum operating pressure will shorten the hose life.
Explanation:
Solution
Almost all hydraulic systems creates pressure surges that may exceed relief valve settings. exposing the hose surge to pressure above the maximum operating pressure shortens the hose life.
In systems where pressure peaks are severe, select or pick a hose with higher maximum operating pressure or choose a spiral reinforced hose specifically designed for severe pulsing applications.
Generally, hoses are designed or created to accommodate pressure surges and have operating pressures that is equal to 25% of the hose minimum pressure burst.
Answer:
A vision statement describes what a company desires to achieve in the long-run, generally in a time frame of five to ten years, or sometimes even longer. It depicts a vision of what the company will look like in the future and sets a defined direction for the planning and execution of corporate-level strategies.
Explanation:
While companies should not be too ambitious in defining their long-term goals, it is critical to set a bigger and further target in a vision statement that communicates a company’s aspirations and motivates the audience. Below are the main elements of an effective vision statement:
-Forward-looking
-Motivating and inspirational
-Reflective of a company’s culture and core values
-Aimed at bringing benefits and improvements to the organization in the future
-Defines a company’s reason for existence and where it is heading