Answer:
B.distance between lines increases
speed of the participants is given as
now the kinetic energy of the participant is given as
As we know that
1 calorie = 4.2 J
so here 230 Calorie is provided by 1 bar
bar required is
Pure water. Lemon juice is acidic so it’s not neutral PH it has lower pH Hand soap is basic which makes it have more PH. baking soda is also a basic so it makes it higher ph.