Can you solve the below algebraic mathematical equation?

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

I’m tall when I’m young, and I’m short when I’m old. What am I?

What can go up a chimney down, but can’t go down a chimney up?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

John is the son of Jacob.
So,
Jacob is the_____of John's father?

What do you answer even though it never asks you questions?

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

What makes this number unique: 8,549,176,320?