You would only heat the rock. Heated rocks are used in some spas & put on your spine.
water will put out fire
it burns
It will burn.
nothing happens
It will catch fire
The battery will explode.
Try it and see
they move faster
Soak it and then put it in a fire. Or dynamite...
It goes into the cup.
Because water the ground and rocks put our fire
it blows up