The answer is false..................
Doppler effect!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! ! ! ! ! ! ! ! ! ! !
I believe it’s
“they have thick atmospheres”
i hope i’m right and this helped you
The speed with which the rock A, B and C which are thrown same initial speed and same mass hit the ground is equal for all the rocks.
Let us consider the initial velocity be 1 m / s and the height of the cliff to be 10 m.
For the rock A which is thrown vertically downward,
v² = u² + 2 a s
v² = 1 + ( 2 * 9.8 * 10 )
v² = 197 m / s
v = 14 m / s
For rock B which is thrown horizontally,
vx = 1 m / s
v² = u² + 2 a s
v² = 0 + ( 2 * 9.8 * 10 )
v = 14 m / s
vy = 14 m / s
v = √ vx² + vy²
v = √ 1 + 14²
v = √ 197
v = 14 m / s
As we can see here all rocks start with same gravitational potential energy and end with same gravitational energy. So all rocks have equal velocity and kinetic energy, and so energy is conserved. So they all hit the ground with same speed.
Therefore, they all hit the ground with the same speed.
To know more about speed of a projectile
brainly.com/question/14000072
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Answer:
As from the given text, the answers are:
a) Genetic variation is the reason why we all humans look different.
b) Evolution relies on the genetic variations as individuals of species with favorable characteristics are more likely to reproduce.
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