Are you saved? If so how do you know?

Psychologists studying infant memory want to determine at what age babies can remember specific events. an experimenter uses several puppets to demonstrate a series of actions while the infant watches. after a delay, the experimenter records how many of the actions the child imitates when playing with the puppets. what is the dependent variable?

What greek scientist created a screw to move water for irrigation?

Which instant of political expression would be considered symbolic speech?