Claudia is accelerating to get on the interstate. At the beginning of the south-facing on-ramp, she is traveling at 11 m/s. When she reaches the end
of the on-ramp 9.0 seconds later, she is traveling at 29 m/s. Assuming south
to be the negative direction, what is Claudia's average rate of acceleration
during this period?

A) 3.1m/s2

B) -3.1m/s

C) 1.9m/s2

D) -1.9m/s?

a

explanation:

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are there options? cause you ain’t. real specific

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.