Answer: They create calcuim chloride, CaCl2
As we know that when charge is released in electric field
It will have two forces on it
1. electrostatic force
2. gravitational force
now if the ball will accelerate upwards so we can say
net upward force = mass * acceleration


now we can find charge q on it by above equation

So above is the charge on the particle
Answer:
A) how your body uses oxygen
Kinetic Energy I’m not 100% shure tho