A ship anchored at sea is rocked by waves whose crests are 21 m apart. The waves travel at 5.6 m/s. How often do the wave crests reach the ship?
t = 21/5.6
To find out how often the wave crests reach the ship, we need to determine the time it takes for each wave crest to reach the ship.
The time it takes for a wave crest to reach the ship can be calculated using the formula:
Time = Distance / Speed
In this case, the distance between wave crests is given as 21 m, and the speed at which the waves travel is given as 5.6 m/s.
Plugging in the values into the formula, we have:
Time = 21 m / 5.6 m/s
Now, let's calculate this:
Time = 3.75 s
Therefore, it takes approximately 3.75 seconds for each wave crest to reach the ship.