Ineed this done as soon as possible. me 1. describe three human body systems and how they are used when you are doing exercise such as running, swimming or biking? 2. what are organelles?   describe the role of two organelles within the cell. 3. a new organism was just discovered within the amazon rainforest.   describe how scientists can use the cells of this organism to determine whether it is a plant or animal. a young child has asked you if rocks are living things.   using evidence from this module, how would you explain to this child if the rock is a living organism?

Circulation system. Blood to working muscles.

Skeleton supports movement and gives leverage

Breathing system. Need more O2 when muscles are working.

Does the rock breathe ? No.

Does it grow ? No

Can it move by itself ? No

3 DNA profile ?

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.