1, cov kev kho mob ntawm cov dej kho mob
1μs / cm (micro-Siemens / cm)
= 10-4s / m (Siemens / m)
= 0.1ms / m (xees Siemens / m)
2, kev kho cov dej kom zoo
Kev Tawv Daws = 1 / Kev Hloov
10 MΩ · cm (megohm · cm) = 0.1 μs / cm (micro-Siemens / cm)
3, qhov concentration ntawm units
(1) huab hwm coj concentration
1 mg / L (mg / l)
= 1ppm
= 103ppb
= 106ppt
= 10-3 μg / L (μg / l)
(2) molar concentration
1 mol / L (mol / l)
= 1000 mmol / L (mmol / liter)
10 ndlwg tus nqi, ndlwg tus nqi
1 gallon ib feeb (gpm) = 0.272 m3 / h (m3 / h) = 272 litres / teev (l / h) = 4.53 L / min
Qhov nquag khiav yuav tsum tau tswj ntawm 4-6 m / h
4, qhov nyuaj
1 lis / gallon (grain / gal) = 17.1 mg / l (mg / L)
1 lis / gallon (grain / gal) = 0.342 mg sib npaug / litre (mgN / L)
Qhov sib npaug ntawm CaCO3 yog 50, uas yog, qhov loj ntawm 1 g sib npaug ntawm CaCO3 yog 50 g;
1 mg sib npaug / liter = 50 mg / l
(1 txhiab lattice = 1.297 gram sib npaug)
12 dej siab
1 psi = 0.07 kg / cm2 = 0.006895 MPa (MPa)
5, qhov chaw siab
1MPa (MPa)
= 10bar (bar)
= 103KPa (kPa)
= 106Pa (Pa)
= 145 psi (psi)
1 hliHg (1 mmHg) = 13.6 hliH2O (13.6 hli dej kem) = 133.32 Pa (Pa)
1 hliH2O (hli dej kem) = 9.8 Pa (Pa)
1 atmospheric qhov siab (standard atmospheric pressure) = 760 mmHg = 0.101 MPa
Lus Ceeb Toom: Vim tias lub siab ntawm cov roj thiab cov kua ua los ntawm lub ntiajteb txawj nqus, qhov siab yog qhov siab
