Answer:
45.93°
Explanation:
The angle of incidence is given as 32.7°
The refractive index of the water that is
Refractive index of the air that is (because the refractive index of air is 1 )
We have to find the angle at which the light leave the water means angle of refraction
So according to snell's law
r =45.93°
So the light leave the water at an angle of 45.93°
Answer:
29 m
Explanation:
given,
speed of the car = 73 Km/hr
= 73 x 0.278 m/s = 20.3 m/s
Time elapses before the motorcycle is moving as fast as the car
using equation of motion
v = u + at
initial speed = 0 m/s
20.3= 0 + 7 x t
t = 2.9 s
b) distance traveled by the car in that time
d = s x t
d = 20.3 x 2.9 = 58.87 m
distance traveled by the police
s = 29.435 m
distance car is ahead = 58.57 - 29.44 = 29.13
= 29 m