Answer:
First one is correct second one I am unsure sorry
Explanation:
Answer: The compression pulse which is produced when the hammer hits the metal bounces backwards and forwards within the metal. Most of the pulse (sound wave) is reflected within the metal rather than transmitted outside the metal into the air because the speed of sound in a metal is much bigger than the speed of sound in air.
Explanation: Brainelist Me
Answer:
There are three main types of memory: working memory, short-term memory, and long-term memory.
Explanation:
brainliest plsss