Two radio antennas a and b radiate in phase. antenna b is a distance of 100 m to the right of antenna a. consider point q along the extension of the line connecting the antennas, a horizontal distance of 30.0 m to the right of antenna b. the frequency, and hence the wavelength, of the emitted waves can be varied. part a what is the longest wavelength for which there will be destructive interference at point q?

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.