Aboy yells in a narrow valley. the sound reflects off of a boulder that is 80m away. how long will it take to hear the echo if the speed of a sound wave is 320 m/s

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher

** urgent** the voltage across the primary winding is 350,000 v, and the voltage across the secondary winding is 17,500 v. if the secondary winding has 600 coils, how many coils are in the primary winding? a- 30 coilsb- 583 coilsc- 12,000 coilsd- 332,500 coils