It is pronounced as HHWae-NG â . Huang is used predominantly in the Chinese language and its origin is also Chinese. The name is of the meaning wealthy, an emperor. The name Huang Fu (Chinese) is a variant of Huang. Huang is an infrequently used baby name for boys. It is not listed in the top 1000 names.
The only way to test a particular variable for sure is to leave all other variables constant, and if a change in ONE variable creates an overall change, then you know that that variable caused it. But if you change 2 variables, and something changes, you don't know which one changed it for sure. So, one variable at a time. A full experiment can test many variables, though. better just to test one variable at a time that way one knows that any changes observed are accounted for by that variable.
There may be more than two dependent variables in any experiment. For example, a researcher might wish to establish the effect of temperature on the rate of plant growth; temperature is the independent variable.