Yes, the observation of humans in public places is legal.
independent variable
If you change more than one variable at a time, you will not be able to tell which variable is responsible for what change. Scientists need to know exactly which variable caused the observed experimental results.
World Music Day is a festival held on 21st June. Also, No Music Day is observed on 21st November.
Rank is observed in the drinking of palm wine, because the people who drink it are the ones who have jobs in hand.
watching for movement in rocks.
The rate of movement observed in the experiment was 5 meters per second.
The rate of traffic observed in this experiment was 100 vehicles per hour.
Experiment
The rate of evaporation observed in the experiment was 0.5 mL per hour.
5 cars per hour
0.25
0.2 Liters per hour... (apex;p)
0.2 Liters per hour... (apex;p)
5 cars per hour
5 cars per hour
0.2 Liters per hour... (apex;p)
Adapt support in response to an individual's feedback or observed reactions while eating and drinking