-7, Ses kaynağından çıkan ses dalgalarının bir yüzeye çarparak tekrar geri dönmesine yankı denir, Bu bilgi kullanılarak ses kaynağı ile engel arasındaki mesafeyi bulabilir miyiz? Açıklayiniz.

Harvey mixes two liquids. which observation of the new mixture most likely indicates a precipitate is forming?

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.

Which terms are used to identify pure substances