QUESTION 6 An ambulance with its siren on is moving at a constant speed of 20 mes. The siren
emits sound waves at a constant frequency. A stationary detector placed on the side
of the road records a frequency that is 50 Hz higher than the original frequency
Take the speed of sound in air as 340 mos-
6.1
Name and state the phenomenon described above​

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

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.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular