3. Which of following is not characteristic of air resistance (a) It always opposes motion
(b) It decrease with speed of object
(c) It increases with surface area
(d) It increases with density of air
4. Feather is dropped on the moon from a height of 1.40 met
m/s2. Determine the time for the feather to fall to the surfa
5. If the ratio of gravity in some solar planet is as mentioned
Fill the table below with suitable numbers: (Note g of Ea

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.