Uh are u okay? G tell ur parents i-
I think the answer would be T<span>ransverse, Longitudinal, & Surface waves.
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Answer:
They have same density
Explanation:
The density of an object is defined as

where
m is the mass of the object
V is its volume
Let's call
and
the mass and the volume of ball C, respectively. Therefore, the density of ball C is:

We know that the volume of ball C is 3 times the volume of ball D, so

And we also know that ball D has 1/3 the mass of ball C:

So, the density of ball D is:

Therefore, the two balls have same density.
Gravity!! It also keeps the planets in orbit!