A toy boat that is 0.10 m long is used to model the actions of an actual boat that is 30 m long. Which ratio shows the relationship between the sizes of the
model and the actual boat?
O A. 1:3
B. 300:1
O C. 1:300
D. 3:1

Explanation:

Size ratio of actual to model = 30 : 0.10 = 300 : 1. (B)

C.  1:300

Explanation:

given:

A toy boat that is 0.10 m long is used to model the actions of an actual boat

that is 30 m long

find:

which ratio shows the relationship between the sizes of the

model and the actual boat?

model = 0.10 m

actual = 30 m

30 / 0.1 = 300

therefore,

the scale ratio of model to actual = 1:300

C.  1:300

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.