Support the development and enjoy premium features with Plutocalc+ version. Available at your app store.Unit conversions Angle Degrees ° minutes seconds Decimal degrees ° Radians rad π.rad Area Metric m⊃2; mm⊃2; cm⊃2; km⊃2; ha US in⊃2; ft⊃2; mi⊃2; Conductivity and...
The theoretical formula of frost heave force was given, and the frost heave force for a tetrahedron space with water was analyzed and discussed. The frost heave forces obtained from the above three theory and the corresponding calculation formulas are different in numerical size, and the magnitude...
If your drinking water comes from a municipal water utility, ourAdvanced City Water Testwill help assure you the plumbing in your home isn’t adding lead, plastic chemicals, and other pollutants to your water—especially in the taps you use for drinking or preparing formula. ...
Comprehensive weight (CW) is a method to couple AHP and CV, and the calculation formula is as follows: $$CW = kSW + \left( {1 - k} \right)OW$$ (9) k is the preference coefficient. In this study, \(k = 0.5\)30. Data normalization In order to eliminate the influence of the...
* The comparison model here is Xiaomi water purifier MR624; the calculation formula of 113% increase in water output speed: (3.2L/min-1.5 L/min) ÷1.5L/min×100%～113%; The formula for calculating the water filling time per second: 3.2L/min=3200ml÷60 seconds～53ml/s, and so on...
From the simplest calculation of diffusion, we can consider the number of molecules of water striking the membrane on one side versus the other side. With this model and an equally simple model of the perfect membrane, we can understand diffusion-driven transport. For a perfect membrane, we ...
The formula parameters for the calculation of\({I}_{CDI}\)values are described in Table1obtained from previous studies13,34,35,36. Although adults are considered in the area, special attention should be pay to the children and infants. The studied people are classified into three groups: inf...
important index for monitoring water quality for irrigation purposes, with calcium, sodium, magnesium, and potassium concentrations included in the SSP calculation and magnesium hazard (MH), which reveals how much magnesium is present in the water. Anionic mismatch in soil caused by an overabundance ...
The coefficient can be determined using the following formula after conducting regression on the principal component.(7)βk=(K′K)-1)K′y From the Eq. (7) the formula for the calculation is:(8)y=Kβk=X(Vβk)=Xβx Finally, we can derive the following expression:(9)βx=Vβk 3.4...
More details about derivation of the calculation formula can be found in the reference (Zhang, 2014). Download: Download full-size image Fig. 5. Reynolds number for the liquid flow at various fracture widths. 2.3. Experimental procedures Experiments were run to measure the undamaged shale ...