What will happen to the 5 pesos stack coins when you hit the coin at the bottom?why is this so?

The correct answer is "The 5 pesos stack coins will remain at its place".

Explanation:

According to Newton's first law "every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force". In this case, hitting a single 5 pesos coin at the bottom of the stack does not represent an external force with enough energy to move the stack considerably. Therefore, the 5 pesos stack coins will remain at its place since it tends to remain at rest as any other object.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3