Answer:
I don't really know
Explanation:
I really wanted to help you, but then I realized i didnt know how to
Calculate the change in heat of the aluminum; show all calculations. Calculate the change in heat of the water; show all calculations. Are the two values the same? Why or why not? See the attached picture for the numbers.
I got -3443.14 J for the aluminum and 3443.595 for the water
They are called stem cells. This cells are undifferentiated which means it can specialize in other types when it receives the right stimuli. They can divide through mitoses and become more stem cell or become a bone, muscle, blood cell, etc.
They can have 2 origins: embryos or some human tissue; their function is to regenerate or substitute damaged cells
Answer:
The heat loss per unit length is ![\frac{Q}{L} = 2981 W/m](https://tex.z-dn.net/?f=%5Cfrac%7BQ%7D%7BL%7D%20%20%20%3D%202981%20W%2Fm)
Explanation:
From the question we are told that
The outer diameter of the pipe is ![d = 104mm = \frac{104}{1000} = 0.104 m](https://tex.z-dn.net/?f=d%20%3D%20104mm%20%3D%20%5Cfrac%7B104%7D%7B1000%7D%20%3D%200.104%20m)
The thickness is
The temperature of water is
The outside air temperature is ![T_a = -10^oC = -10 +273 = 263K](https://tex.z-dn.net/?f=T_a%20%3D%20-10%5EoC%20%3D%20-10%20%2B273%20%3D%20263K)
The water side heat transfer coefficient is ![z_1 = 300 W/ m^2 \cdot K](https://tex.z-dn.net/?f=z_1%20%3D%20300%20W%2F%20m%5E2%20%5Ccdot%20K)
The heat transfer coefficient is ![z_2 = 20 W/m^2 \cdot K](https://tex.z-dn.net/?f=z_2%20%3D%2020%20W%2Fm%5E2%20%5Ccdot%20K)
The heat lost per unit length is mathematically represented as
![\frac{Q}{L} = \frac{2 \pi (T - Ta)}{ \frac{ln [\frac{d}{D} ]}{z_1} + \frac{ln [\frac{d}{D} ]}{z_2}}](https://tex.z-dn.net/?f=%5Cfrac%7BQ%7D%7BL%7D%20%20%20%3D%20%5Cfrac%7B2%20%5Cpi%20%28T%20-%20Ta%29%7D%7B%20%5Cfrac%7Bln%20%5B%5Cfrac%7Bd%7D%7BD%7D%20%5D%7D%7Bz_1%7D%20%20%2B%20%20%5Cfrac%7Bln%20%5B%5Cfrac%7Bd%7D%7BD%7D%20%5D%7D%7Bz_2%7D%7D)
Substituting values
![\frac{Q}{L} = \frac{2 * 3.142 (363 - 263)}{ \frac{ln [\frac{0.104}{0.002} ]}{300} + \frac{ln [\frac{0.104}{0.002} ]}{20}}](https://tex.z-dn.net/?f=%5Cfrac%7BQ%7D%7BL%7D%20%20%20%3D%20%5Cfrac%7B2%20%2A%203.142%20%28363%20-%20263%29%7D%7B%20%5Cfrac%7Bln%20%5B%5Cfrac%7B0.104%7D%7B0.002%7D%20%5D%7D%7B300%7D%20%20%2B%20%20%5Cfrac%7Bln%20%5B%5Cfrac%7B0.104%7D%7B0.002%7D%20%5D%7D%7B20%7D%7D)
![\frac{Q}{L} = \frac{628}{0.2107}](https://tex.z-dn.net/?f=%5Cfrac%7BQ%7D%7BL%7D%20%20%20%3D%20%5Cfrac%7B628%7D%7B0.2107%7D)
![\frac{Q}{L} = 2981 W/m](https://tex.z-dn.net/?f=%5Cfrac%7BQ%7D%7BL%7D%20%20%20%3D%202981%20W%2Fm)