What runs around the whole yard without moving?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

What can jump higher than a building?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Take one out and scratch my head, I am now black but once was red. What am I?

Which alphabet is a part of our body?

John was drowned by he was not wet. How?