Ason lives near a state park, and he likes hiking through the grassy trails that lead to a nearby lake. He appreciates nature and the surrounding components making up the ecosystem. Jason knows humans rely on ecosystems and their cycling of matter and energy. Read each ecosystem service example below and identify the type of ecosystem service for each.


natural resources

___
plants and animals


water cycle and nutrients



recreational services

1.
cultural services

2.
regulating services

3.
provisioning services

4.
supporting services

the answer is b i think

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.

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