(25 points.) in what way does an earthquake provide evidence about the layers of earth?

When you turn on a battery-operated device, an electrical circuit is

How many neutrons does plutonium -196 with an atomic number of 78.

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.