A diver of mass 10 kg drops from a board 10.0 m above the water’s surface. Neglect air resistance. a. Find its speed 5.0 m above the water surface

b. Find his speed as he hits the water. Use conservation of mechanical energy

c. Calculate the kinetic energy when he hits the water surface?

d. Calculate the potential energy at the initial height?

e. Based on your results, record your data in the table below and explain your observation
KE PEg
y=10 m .
y=5m .
y=0m

positive reinforcement? ?

wavelegth as in spectrum red oygbiv

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.