You are standing at the midpoint between two speakers, a distance d away from each. the speakers are playing the exact same sound of frequency 170 hz in phase with each other. describe what happens when you walk 1.5 m directly toward one of the speakers. assume the speed of sound is 340 m/s. also assume you can't hear any sounds except those produced by the speakers.

Using a caesar cypher with an offset of three characters (a -> d, b -> e, z -> c), what would be the correct cypher text for the plain text "attack at dawn"?

How does changing the frequency affect the energy of the wave?

Aswimmer is determined to cross a river that flows due south with a strong current. initially, the swimmer is on the west bank desiring to reach a camp directly across the river on the opposite bank. in which direction shoud the swimmer head? a. the swimmer should swim southeast. b. the swimmer should swim south. c. the swimmer shuold swim northeast. d. the swimmer should swim due north. e. the swimmer should swim due east.