You want to put a new cd in your car stereo. while driving at 45 mi/h, you look away for 2.0s. what distance (in miles) do you drive blind.

v = speed of car = 45 mi/h

we know that :

1 h = 60 min   and 1 min = 60 s

t = time taken for drive blind = 2.0 s = (2.0 s) (1 min/60 sec) (1 h /60 min)

t = ((2.0 x 1 x 1)/(60 x 60)) hour

t = 0.00056 hour

d = distance traveled while driving blind

distance traveled while driving blind is given as

d = v t

inserting the values

d = (45 mi/h) (0.00056 h)

d = 0.0252 miles

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

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.