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Electricity energy is converted into internal energy through work. As the internal energy of the heater increases so, too, does its temperature. Energy is then lost to the surroundings through heat transfer. The change in the heater's internal energy is the difference between the work done on the heater and the heat transfer away from it.
Sound Energy
no
Water heater is real danger, also is a waste of energy, solar energy water heater is able to avoid
Any heater that has the Energy Star label will be very energy efficient. The Honeywell eco line, for instance, are very energy efficient.
It converts electric energy to thermal energy
It depends upon the wattage of the heater.
solar energy and electric heater
a heater
Valco Infrared heater can be used as a space heater. The can save you lots of money on energy costs.
Yes, electrical energy can be changed into thermal (heat) energy. Light is electromagnetic energy, and electricity can be changed into light energy. We know that a resistance heater changes electrical energy into thermal energy. An electric range does this, as does an electric space heater. We see electrical energy changed into light in fluorescent lights.
Because all the electrical energy supplied to the heater is emitted as heat. There is no other way for the energy to escape.