Explain in words why each harmonic should have the approximate amplitude that it does in order to make up a triangle wave. for example, why are all the even harmonics zero? why is the third harmonic negative or positive? are the amplitudes different for sines and cosines? why?

How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a.the kinetic energy increases.b.the kinetic energy decreases.c.the kinetic energy remains the same.d.the kinetic energy is always zero.

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?

What sort of waves exhibit the doppler effect?