Answer:
Explanation:
Hello,
In this case, by using the Bernoulli equation:
Whereas 
accounts for the heat loss, so we can compute the change of pressure by:
![p_1 +\frac{1}{2}\rho v^2_1+\rho gh_1= p_2+\frac{1}{2}\rho v^2_2+\rho gh_2+\rho h_L\\\\p_2-p_1=\frac{1}{2}\rho v^2_1+\rho gh_1-\frac{1}{2}\rho v^2_2-\rho gh_2-\rho h_L\\\\\Delta p=\rho *[\frac{1}{2}(v_1^2-v_2^2)+g(h_1-h_2)-h_L ]](https://tex.z-dn.net/?f=p_1%20%2B%5Cfrac%7B1%7D%7B2%7D%5Crho%20v%5E2_1%2B%5Crho%20gh_1%3D%20p_2%2B%5Cfrac%7B1%7D%7B2%7D%5Crho%20v%5E2_2%2B%5Crho%20gh_2%2B%5Crho%20h_L%5C%5C%5C%5Cp_2-p_1%3D%5Cfrac%7B1%7D%7B2%7D%5Crho%20v%5E2_1%2B%5Crho%20gh_1-%5Cfrac%7B1%7D%7B2%7D%5Crho%20v%5E2_2-%5Crho%20gh_2-%5Crho%20h_L%5C%5C%5C%5C%5CDelta%20p%3D%5Crho%20%2A%5B%5Cfrac%7B1%7D%7B2%7D%28v_1%5E2-v_2%5E2%29%2Bg%28h_1-h_2%29-h_L%20%5D)
Thus, we must first compute the velocity inside the 5-cm section by using the continuity equation:
It means that the change in pressure in Pa turns out (density is 1500 kg/m³ given the specific gravity of the fluid):
![\Delta p=1500\frac{kg}{m^3} *[\frac{1}{2}((1.2\frac{m}{s})^2-(1.92\frac{m}{s})^2)+9.8m/s^2(0m-15.0m)-25\frac{m^2}{s^2} ]\\\\\Delta p=1500\frac{kg}{m^3}*(-1.1232\frac{m^2}{s^2} -147\frac{m^2}{s^2} -25\frac{m^2}{s^2} )\\\\\Delta p=-259684.8Pa](https://tex.z-dn.net/?f=%5CDelta%20p%3D1500%5Cfrac%7Bkg%7D%7Bm%5E3%7D%20%20%2A%5B%5Cfrac%7B1%7D%7B2%7D%28%281.2%5Cfrac%7Bm%7D%7Bs%7D%29%5E2-%281.92%5Cfrac%7Bm%7D%7Bs%7D%29%5E2%29%2B9.8m%2Fs%5E2%280m-15.0m%29-25%5Cfrac%7Bm%5E2%7D%7Bs%5E2%7D%20%20%5D%5C%5C%5C%5C%5CDelta%20p%3D1500%5Cfrac%7Bkg%7D%7Bm%5E3%7D%2A%28-1.1232%5Cfrac%7Bm%5E2%7D%7Bs%5E2%7D%20-147%5Cfrac%7Bm%5E2%7D%7Bs%5E2%7D%20-25%5Cfrac%7Bm%5E2%7D%7Bs%5E2%7D%20%29%5C%5C%5C%5C%5CDelta%20p%3D-259684.8Pa)
Therefore, the change in pressure in bar and MPa turns out:
Such negative sign means that the pressure at the 5-cm section is lower than the pressure at the 8-cm section.
Best regards.
The answer would be water , carbon dioxide and methane because they all contain more than one element.
Water-H2O
Carbon Dioxide-CO2
Methane-CH4
The sulphate solutions came from a recycling LIBs waste cathode materials, which were done by previous research; their content is shown in Table 1 [18]. Sodium carbonate (Na2CO3) was purchased from Nihon Shiyaku Reagent, Tokyo, Japan (NaCO3, 99.8%), for the chemical precipitation. CO2 was purchased from Air Product and Chemical, Taipei, Taiwan (CO2 ≥ 99%), to carry out the hydrogenation–decomposition method. Dowex G26 was obtained from Sigma-Aldrich (St. Louis, MO, USA) and was used as a strong acidic cation exchange resin, to remove impurities. Multi-elements ICP standard solutions were acquired from AccuStandard, New Haven, Connecticut State, USA. The nitric acid (HNO3) and sulfuric acid (H2SO4) were acquired from Sigma-Aldrich (St. Louis, MO, USA) (HNO3 ≥ 65%) (H2SO4 ≥ 98%) The materials were analyzed by energy-dispersive X-ray spectroscopy (EDS; XFlash6110, Bruker, Billerica, MA, USA), X-ray diffraction (XRD; DX-2700, Dangdong City, Liaoning, China), scanning electron microscopy (SEM; S-3000N, Hitachi, Tokyo, Japan), and inductively coupled plasma optical emission spectrometry (ICP-OES; Varian, Vista-MPX, PerkinElmer, Waltham, MA, USA). In order to
Appl. Sci. 2018, 8, 2252 3 of 10
control the hydrogenation temperature and heating rate, a thermostatic bath (XMtd-204;
