Is a durable metal and is widely used for casting, which is a process by which melted metal is poured into a mold.
a. bronze
c. copper
b. silver
d. gold user: special effects could include all of the following, except which?
a. fires or explosions
c. elaborate costumes
b. computerized deletes (ex: wires)
d. color correction

Atrain is traveling at 30.0 m/s relative to the ground in still air. the frequency of the note emitted by the train whistle is 262 hz. the speed of sound in air should be taken as 344 m/s. what frequency (f approach) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it? what frequency (f recede) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and receding from it?