How do the electrical patterns in electronics convey information?
with analog and electric signals
with analog and digital signals
with electric and thermal signals
with electric and digital signal

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

How can waves travel through ground?

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions