Asevere storm on january 10, 1992, caused a cargo ship near the aleutian islands to spill 29 000 rubber ducks and other bath toys into the ocean. ten months later hundreds of rubber ducks began to appear along the shoreline near sitka, alaska, roughly 1600 miles away. what was the approximate average speed of the ocean current that carried the ducks to shore in (a) m/s and (b) mi/hr

Explanation:

The average speed is :

Now, how many seconds are in 10 months? We know that there are 31 days in seven months (January, March, May, July, August and October), 30 days in three months ( April, June and September) and 28 days in February. This gives us:

Now, in every day there are 24 hours. So, the total number of hours will be:

So, the speed will be:

To convert this to m/s we can use the conversion factors:

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.