In parallel combination, the capacity of each capacitor is 11 F.
In series combination, the capacity of each capacitor is 44 F.
Let there are two capacitors each of capacitance C.
When they are connected in parallel:
In parallel combination, the effective capacitance is Cp.
Cp = C1 + C2 = C + C
22 = 2 C
C = 11 F
When they are connected in series:
In parallel combination, the effective capacitance is Cs.
1 / Cs = 1 / C1 + 1 / C2 = 1 / C + 1 / C = 2 / C
1 / 22 = 2 / C
C = 44 F
that would probably be Rock A is harder than Rock B
Because if Rock A can scratch Rock B then it obviously means that Rock A is harder.
Hope This Helps You Out♡
She or he will need initial velocity(u).
So, she or he can use: v² - u² = 2as