Explanation:
In local galactic group the force of expansion of universe is overcome by the force of attraction due to gravity. Best example is our own galaxy milky way and another giant galaxy in our local group Andromeda. Andromeda having enormous gravity is pulling milky way towards itself, overcoming the force of expansion.
So, there are possibilities of collision despite the expansion of universe at a rapid pace. It is estimated that the milky way and Andromeda will collide each other after about 50 billion years from now.
Answer:
![R_{max} = 14 m](https://tex.z-dn.net/?f=R_%7Bmax%7D%20%3D%2014%20m)
Explanation:
Maximum height reached by Dolphins is given as
![H = 7 m](https://tex.z-dn.net/?f=H%20%3D%207%20m)
now we know that
![H = \frac{v^2}{2g}](https://tex.z-dn.net/?f=H%20%3D%20%5Cfrac%7Bv%5E2%7D%7B2g%7D)
![7 = \frac{v^2}{2g}](https://tex.z-dn.net/?f=7%20%3D%20%5Cfrac%7Bv%5E2%7D%7B2g%7D)
![v^2 = 2(7)(9.81)](https://tex.z-dn.net/?f=v%5E2%20%3D%202%287%29%289.81%29)
![v = 11.72 m/s](https://tex.z-dn.net/?f=v%20%3D%2011.72%20m%2Fs)
now the formula of range is given as
![R = \frac{v^2 sin(2\theta)}{g}](https://tex.z-dn.net/?f=R%20%3D%20%5Cfrac%7Bv%5E2%20sin%282%5Ctheta%29%7D%7Bg%7D)
now we know that for maximum range the angle should be 45 degree
so we will have
![R_{max} = \frac{v^2}{g}](https://tex.z-dn.net/?f=R_%7Bmax%7D%20%3D%20%5Cfrac%7Bv%5E2%7D%7Bg%7D)
![R_{max} = 7 \times 2](https://tex.z-dn.net/?f=R_%7Bmax%7D%20%3D%207%20%5Ctimes%202)
![R_{max} = 14 m](https://tex.z-dn.net/?f=R_%7Bmax%7D%20%3D%2014%20m)
Hij ane les spoona sudhea alldor oakie
Answer:
Option C.
Polarization takes place!