His the answer I hope it helps
No
Water’s density is 1 g/cm3 and AL is 2700kg/m3
Answer:
75000 Hz
Explanation:
f = V / λ (f= frequency, v=velocity of wave, lambda= wavelength)
alternatively, f = c / λ (f= frequency, c= speed of light- 3.00x10^8 m/s, lambda= wavelength)
f= [3.00x10^8 m/s]/[4000 m]
=75000 Hz
C because it’s just leaning against the wall it’s not moving
