Q1. An electron with a speed of 3.28 × 10^8 cm/s in the positive direction of an x axis enters an electric field of magnitude 1.26 × 10^3 N/C, travelling along a field line in the direction that retards its motion. (a) How far would the electron travel in the field before stopping momentarily, and (b) how much time would have elapsed?

Q2. Both drawings show the same square, each of which has a side of length L = 0.62 m. An observer O is stationed at one corner of each square. Two loudspeakers are located at corners of square, as in either drawing 1 or drawing 2. The speakers produce the same single-frequency tone in either drawing and are in phase. The speed of sound is 343 m/s. Find the single smallest frequency that would produce both constructive interference in drawing 1 and destructive interference in drawing 2.