Answer:
0.66
Explanation:
By using the formula
u = v^2 / r g
Where u is coefficent of friction
u = 23.5 × 23.5 / (85 × 9.8)
u = 0.66
83 hertz
OPTION A
Given
wavelength=4.15m
speed=345 m/s
I hope it helped you
Answer:c
B. changing by a constant amount each second
thats my answer