Aball is thrown directly upward from a height of 8 ft with an initial velocity of 20 ft/sec. the function s(t) = −16t²+20t+8 gives the height of the ball, in feet, t seconds after it has been thrown. a. determine the time at which the ball reaches its maximum height and find the maximum height. b. how long after the ball is thrown does it land back on the ground?

"induction" is the process of charging an object without touching it.hope my answer has you : )

Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.