<span>Nothing happens to the pitch of a cell phone ring when the amplitude
of a sound wave increases.
Pitch and amplitude are both characteristics of a wave, but they're not
connected, and they don't influence each other.</span>
Answer:
option (B) is the correct option.
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Biosphere is the answer, hope i helped :))
<span>4) Formation of a gas
When methane burns, it produces the gases water vapor and carbon dioxide.
</span><span />
1. It’s true
4 ,7 ,8 is correct
