The bowling ball is whizzing down the bowling lane at 4 m/s. if the mass of the bowling ball is 7 kg, what is its kinetic energy?

Ek = (1/2)mv^2

m=7kg
v=4m/s

Ek=(1/2)(7kg)(4m^2/s^2) = 14 kg m^2/s^2

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na