A wave produced by a door bell?
There is a sound wave yes.
Answer:
C) When wind direction or wind speed changes with altitude :)
Explanation:
Answer:
it decreases because of the differences in hormones
Answer:
about 42.35 m/s
Explanation:
Use the equation for accelerated motion (g), and with zero initial velocity that doesn't include time:

which for our case would reduce to:

then the velocity just before hitting would be about 42.35 m/s
Answer:
Try B or C if I'm wrong sorry
Explanation: