Answer:
It took the rock 2 seconds to get to the water from the bridge.
Explanation:
Since Forrest drops the rock, it means its initial velocity is zero, and because it is freely falling under the influence of gravity, after time
it will gain a velocity
of
,
solving for
we get:
![t = \dfrac{v}{g}.](https://tex.z-dn.net/?f=t%20%3D%20%5Cdfrac%7Bv%7D%7Bg%7D.)
Since in our case the velocity the rock gained was
and the acceleration due to gravity is
, we have
![t = \dfrac{19.6m/s}{9.8ms^{-2}}](https://tex.z-dn.net/?f=t%20%3D%20%5Cdfrac%7B19.6m%2Fs%7D%7B9.8ms%5E%7B-2%7D%7D)
![\boxed{t =2s.}](https://tex.z-dn.net/?f=%5Cboxed%7Bt%20%3D2s.%7D)
Thus, the time took the rock to reach the water from the bridge was 2 seconds.
The correct answer is "contact metamorphism." A plume of magma pushes its way into a crack in Earth's crust. The heat causes contact metamorphism. Contact metamorphism is a <span>metamorphism due to contact with or proximity to an igneous intrusion.</span>
Remember Dark Energy is repulsive, the more the faster the universe expands (indeed accelerates), so the faster it would cool down and increase its size, not the other way. Now, no one knows what it is. For instance, if Dark Energy would rather be some other geometric effect, it could have a different ending than just if it is a cosmological constant term. So far, though, all experimental data do not favor anything else that is not compatible with just a cosmological constant ... We'll need to wait few years (~10 years) to get to know much better this with missions and ground experiments that are undergoing or planned to be launched.