Which two measures are needed to calculate the distance between the seafloor and the ship?
O A. The number of sound waves emitted from the ship
B. The size of the ship
C. The speed of sound waves
D. The amount of time it takes sound waves to travel to the seafloor
and back

The two measures required are:

C. The speed of sound waves.

D. The amount of time it takes sound waves to travel to the seafloor and back.

Explanation:

To measure the distance between the seafloor and the ship, it's very important to know:

i. the speed of the waves

ii. the amount of time it takes the sound to travel and back.

When estimating water depth, the speed of sound through the water is used. Then the formula for the simple calculation is given as:

Distance = speed x time.

Where speed is the speed of the sound waves and time is the amount of time it takes the sound to travel and back.

the answer is either b or c

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.