I would assume you mean the sense of touch. This is simply nerve endings in any part of the body. Esoterically, however, to "touch" feelings or the heart (compassion) requires a psychological predisposition to do so and has no relationship to the physical form of touching.

John P. Scott has written:

'Social Theory'

'The Hidden Bible'

'The Esoteric Gospel According To St. Mark'

'The anatomy of Scottish capital' -- subject(s): Capital, Corporations, Finance, History

'The Best Occult Writings Of John P. Scott'

'Four Gospels Esoterically Interpreted'

'The Esoteric Gospel According to St. Luke'

To explain this non-esoterically: you could. Height is characteristic that is produced by a compilation of different genes--there are many genes that are involved in height. Depending on your parents lineage, were their father's and mother's taller? This may be questions you should ask. And as a note, just because you are taller then them presently does not necessarily mean that your parents were not once as tall as you: as you age you shrink.

Ho boy this is a big question. The simplest and most obvious application is in nuclear reactors, stars and nuclear weapons. All of these get their energy from changes in atomic nuclei that convert a small amount of mass into energy.
More esoterically, it is the principle upon which particle accelerators work - smash together ordinary boring particles with a lot of energy and they disintegrate into even more energy. All this energy can then recombine into different, exotic particles some of which won't have existed naturally in the universe since the big bang.

This is entirely dependent on the mass of ice, its thickness, and surface area of the ice that interfaces with the warmer water (it will melt much faster, of course, at 80 °C than at 80 F°).

There is also a question of the pressure at which the mixing is done, and, more esoterically, of the specific type of ice, as there are different forms of ice other than what we normally use.

Experimentally

A one-inch cube of ice in a 10 gallon tub full of water at 80 °F melted to invisible size in about 6 minutes. This is because the cube was unable to appreciably cool the larger volume of water. (This time can vary if the cube is stationary, or is moving in the water, which keeps the interface temperature more-or-less constant.)