Usually it is burned.
The power
6.5 kJ per 250 g of coal
A radio receiver transforms electrical energy to acoustic energy
the energy that has transformed in a guitar when you strummed is sound energy,besides it makes a sound when you strummed a guitar ..
"And two eyes made out of coal" - full lyrics at the related link below .
Energy cannot be 'made' or 'destroyed'. It can simply be transformed to a different type of energy. Coal contains chemical energy, which will for example, be converted to heat energy in say a coal fired industrial boiler.
The energy in coal is stored as chemical potential energy.When the coal is burned, this chemical energy is converted to heat. The boiler converts this thermal energy into pressure of the steam.The pressure energy in the steam is then converted into rotating mechanical energy using the turbine. As the turbine spins the generator, the generator converts this into electrical energy.
is it transformed?
Burning coal has chemical potential energy, because the energy is stored up in the bonds between the carbon molecules, and when the coal is burned, the stored energy is released and transformed into heat, light, and even sometimes sound energy.
Energy can be transformed into different ways of energy.
it can be transformed into thermal energy
Solar energy is, by definition, energy. It is not transformed into it. It is it.
it can transformed by fuels
In many ways. For hence, the sun; radiant energy, can be turned to plants; chemical energy. Or electrical energy by solar panels. Coal can become electrical energy, which could be used by a fan.
We are pretty sure that coal formed from layers of plant matter accumulating at the bottom of a body of water, then being deeply buried under sediment and rock and eventually compressed and transformed by the heat and pressure into coal. The plants that eventually became coal derived their energy from the sun while they were living - just as plants do now - so the sun is the original source of the energy you get from coal.
Its transformed into work!
It is transformed I think