When two waves are in superposition, how do you determine the resulting amplitude of the medium?

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

If you wanted to move an electron from the positive to the negative terminal of the battery, how much work w would you need to do on the electron? enter your answer numerically in joules.