Answer:
The angle of launch of the rubber band affects the initial velocity. The more the rubber band is stretched the more force it applies to return to equilibrium and the more kinetic energy that results in.
Answer:
67,032 J
Explanation:
According to the law of conservation of energy, the kinetic energy of the boulder just before hitting the Roadrunner (at ground level) will be equal to the gravitational potential energy of the boulder at the top of the cliff, therefore:
where
m is the mass of the boulder
g is the acceleration of gravity
h is the height of the cliff
Here we have
m = 76 kg
g = 9.8 m/s^2
h = 90 m
Substituting,
Answer: b
. Natural selection is a process that brings about evolution
Explanation:
The natural selection can be defined as the differential survival and reproduction of the organisms that have better phenotypic traits which allow them to survive in their changing environment. These traits are passed on to the next generation this process is necessary for the evolution of the species. The evolution is the change in the structure and function of the organisms with the passage of them.