Only on the middle hill does the acceleration along the path decrease with time, for the hill becomes less steep as motion progresses. when the hill levels off, acceleration will be zero. on the left hill, acceleration is constant. on the right hill, acceleration increases as the hill becomes steeper. the speed increases in all cases as the ball rolls downhill.

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.

The capital letters and lowercase letters smoothly run together without lifting the pen

An em wave does not require a medium, while a mechanical wave does.