Answer:
D.
Explanation: Both have shapes determined by gravitational forces.
Answer:
V=34.2 m/s
Explanation:
Given that
Height , h= 54 m
Horizontal distance , x = 35 m
Given that , the ball is thrown horizontally , therefore the initial vertical velocity will be zero.
In vertical direction :
We know that

Now by putting the values in the above equation we got


Assume 
Thus



We also know that



In horizontal direction :


Thus the resultant velocity


V=34.2 m/s
Therefore the velocity will be 34.2 m/s.
The density of an object remains same irrespective of its shape, size and quantity.
Explanation:
Density is an intensive property. This means that regardless of the object's shape, size, or quantity, the density of that substance will always be the same. Even if you cut the object into a million pieces, they would still each have the same density. It is because density in an intensive property of matter.
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Answer:
What does this mean i don't get you??
Answer:

Explanation:
Equation of the rocket is,

Here, v' is the relative velocity of rocket.
In space F is zero.
So,

Now the momentum can be obtained by multiply by m on both sides.

Now for maxima, 

Now,

Therefore, the mass of the rocket while having maximum momentum is 