In an elecrical socket.
Not likely - any machine wastes some energy; that would reduce the useful output energy.
the main source would be electric
The use ful energy from headphones would be sound , the wasteful would be battery power.
Electric Energy is the energy of the Universe. All energy is electric energy. Gravitational Energy is electric in the sense that matter is held together by electric energy. Briefly, Electric energy is E= - q1q2 zc/r where q is the electric charge, z is the free space resistance and c is the speed of light.
Well, it would be solar to electric. Right? Because if the way to operate a gate has a solar panel, but the gate is electric, it would be solar to electric.
You could find an electric hand dryer at Home Depot or Lowes. I would recommend Excel. They have fantastic hand dryers that are very energy efficient.
In electric bell, electrical energy is converted int sound energy.
Hydro-electric
Mechanical energy
Someone can find electric storage heaters on any IKEA local store. One can also find electric storage heaters online at stores like Energy Saving Trust, Barry Gray and HW Electric UK.
An electric motor or a fan would be an example of electrical energy changing to kinetic energy
Electric energy to kitenic energy