Example：Two objects were weighed to be 1.6380 g and 0.1637 g, respectively. It is supposed that the true weights for them are 1.6381 g and 0.1636 g. Please give out the corresponding absol ute vales and relative values. E = 1.6380 g – 1.6381 g = -0.0001 g Absolute value: E = 0.1637 g - 0.1636 g = 0.0001 g Er = -0.0001/1.6381×100% = -0.006% Er = 0.0001/0.1638×100% = 0.06%
IV :industrial water, and entrainment water V :agricultrial water, and landscapewater
1.5
Error
Data analysis
Error is the difference between true value and determined value.
During the cycling process, impurities such as heavy metals, toxic organic chemicals, compounds, carbon dioxide, bacterials, humus, protein, sand, algae, and mud can be dissolved and involved in the water.
Uncertainty means the amount by which a measured value deviates from the true value.
