What frequencies will a 1.90 m long tube produce in the audible range (20 hz - 20,000 hz) at 18.0°c for the following cases? (a) the tube is closed at one end lowest frequency hz second lowest frequency hz highest frequency (rounded to the nearest hz) hz (b) the tube is open at both ends lowest frequency hz second lowest frequency hz highest frequency (rounded to the nearest hz) hz

What belongs in the areas marked x and y? x: the internal energy of a piston system increases as heat is added and rises to a cool area y: as thermal energy is added to a container, some of the energy is lost to the environment x: as thermal energy is added to a container, some of the energy is lost to the environment y: the internal energy of a piston system increases as heat is added and rises to a cool area x: a cold spoon placed in hot liquid gets warmer y: thermal energy is converted to light energy x: thermal energy is converted to light energy y: a cold spoon placed in hot liquid gets warmer