Please help me

Sally sits and observes an ocean wave
A. She times waves and finds that it takes 32.8 s for 6.00 waves to pass by. What is the period of
the wave?

B. What is the frequency of the wave?

C. She also notices that there is a distance of 1.82 m between crests. What is the wavelength of
the wave?

D. Finally, she records that from the highest point on a wave to the lowest point is a distance of
0.742 m. What is the amplitude of the wave?

E. Calculate the velocity of the wave.

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

Explain the consequences of this addiction to the brain tissue

What are two different ways you could find the value of a? explain these methods.