A rock is thrown from a height of 2.0 m at a window that is located 9.0 m above the ground. The initial velocity of the rock is 20 m/s, and it is thrown at an angle of 40 above the horizontal. If the rock strikes the window on the upward trajectory, what is the horizontal distance between the person throwing the rock and the window

The value is  

Explanation:

From the question we are told that

   The height is h =  2.0 m

   The height of the window is

    The initial velocity of the rock is

    The angle at which it is thrown is

Generally the  vertical component of the velocity of the stone is mathematically represented as

=>

Generally the height of the window from the ground is mathematically represented as using kinematic equation as

=>  

Here g is negative -9.8 m/s^2 because the direction of the stone is against gravity

   So

Solving this quadratic equation using quadratic formula we obtain

     t = 0.770 s

Generally the velocity of the stone on the x axis is mathematically represented as

=>    

Generally the distance between the person throwing the rock and the window is mathematically represented as

=>    

=>    

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.