The position (in radians) of a car traveling around a curve is described by θ (t) = t 3 - 2t 2 - 4t + 10 where t (in seconds). what is the angular acceleration at t = 5 s? the position (in radians) of a car traveling around a curve is described by θ (t) = t 3 - 2t 2 - 4t + 10 where t (in seconds). what is the angular acceleration at t = 5 s? '

Explanation:

Given

Position of a car is  given by

and angular speed is

angular acceleration is

at

d. platinum would have the greatest temperature increase because it has the lowest specific heat.

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.