Answer:
d. boost frequencies below 80 Hz.
Explanation:
Low frequency sound appear to be soothing to mind. It is called bass . bass instruments play low frequency notes. But to produce low frequency note , the size of musical instruments have to be increased which increases its cost.
Any instrument which boosts low frequency are therefore costly . They are accompanied by air amplifier.
i would sat C then the impact is weaker
Answer:
C
Explanation:
If the theory were to be proved you you need to repeat the experiment over and over again so that way you can prove that it is true wuth the same results.
It is the energy an object has because of its motion.