Answer:
Sound energy is produced when a force causes an object or substance to vibrate. The energy is then transferred through the substance in waves, called sound waves.
Step-by-step explanation:
Answer:
last one
Step-by-step explanation: 25 divided by four is 6.25
Answer:
8w-2=6
Step-by-step explanation:
All the sides are 20 cm resulting in the perimeter being 80