Question

A torpedo is launched under water, targeting a naval vessel about 5,000 m away. How can the vessel detect the torpedo before it reaches the vessel?

Answer 1

Answer:

By listening for it under water.

Explanation:

1. By seeing it fly above the water.

2. By listening for it in the air.

3. By listening for it underwater.

4. None of the above it wouldn't be able to detect it in time.

It can't be #1 because in the problem it states that the torpedo is launched underwater (and its a torpedo its fast)

It cant be #2 for the same reason for #1

It can't be #4 because #3 states you can listen for it underwater which is where the torpedo was launched and is to fast to hear it above water before it reaches the water.