two random walkers start out together at the origin, each having equal probability of making a step to the left or right along the r axis. find the probability that they meet after n steps. (they take their steps simultaneously. it may be to consider their relative motion.)

Cin carbonh in hydrogeno in oxygen

Letter a, because when there are unlike charges they will always attract to each other.

An atom's smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to move. 

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.