Arock is thrown vertically upward from ground level at time t = 0. at t = 1.6 s it passes the top of a tall tower, and 1.0 s later it reaches its maximum height. what is the height of the tower?
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Ответ:
The rock has height
at time
according to
where
is the velocity with which it was thrown, and g = 9.8 m/s^2 is the acceleration due to gravity.
Complete the square to get
which indicates a maximum height of
occurs when
. We're told this time is 2.6 s after the rock is thrown:
So when t = 1.6 s, the rock reaches the tower's height of
Ответ:
Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.
Arrow and line diagrams take up a lot of space and make it difficult to count electrons.
Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.
(re-write in your own words this is off engenuity)