Which of the following must an engineer take into account when designing a roller coaster? A. the mass of the roller coaster
B. The rates at which the roller coaster will change directions
C. the total mass of the people that will ride the roller coaster
D. the acceleration of the roller coaster due to gravity

Ithink the answer is d i hope it my friend message me if i’m wrong and i’ll change my answer and fix it for you

Because its reliable.   there is no pollution  the chances of a radiation leak is low

Sublimation- which change of state is shown in model

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.