A rock is thrown straight up with an initial velocity of 25.0 m/s. What maximum height will the rock reach before starting to fall downward

31,86m

Explanation:

mgh=(mv^2)/2

gh=v^2/2

h=v^2/2g

h=25^2/2*9 81

h=31,86m

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this