Solar energy is converted into what energy

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.

Madison lives near the ocean. she’s formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals. if madison plans to test this hypothesis, she will have to deal with the following variables in her experiment: dependent variable: independent variable: one possible confounding variable:

What is the frequency if a wave that pases a given pount 22 times in 2 seconds