Answer:1.27
Explanation:
Given
incident angle 
refracted angle 
Suppose
is the refractive index of material then using Snell's law we can write

where
=refractive index of air



Its like newtons 3rd law that once in motion a outer force has to stop it
Answer:
Explanation:
Given
diameter of spacecraft 
radius 
Force of gravity
=mg
where m =mass of object
g=acceleration due to gravity on earth
Suppose v is the speed at which spacecraft is rotating so a net centripetal acceleration is acting on spacecraft which is given by






Acceleration in m/s^2 = 2/10 = 0.2 m/s^2
A is growth!!!!! B is reproduction!!!