Two sources emit waves that are coherent, in phase, and have wavelengths of 26.0 m. a) Do the waves interfere constructively or destructively at an observation point 91.0 m from one source and 221 m from the other source?
b) Do the waves interfere constructively or destructively at an observation point 44.0 m from one source and 135 m from the other source?

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.