Thermal energy to electrical energy
The energy transformation that occurs when your body produces heat is typically the conversion of chemical energy stored in food into thermal energy. This process is known as metabolism and involves the breaking down of molecules to release energy in the form of heat.
A useful energy transformation in a vacuum cleaner is when electrical energy is converted into mechanical energy to power the motor that creates suction for collecting dust and debris. This mechanical energy is then transformed into kinetic energy as the air and particles are sucked into the vacuum cleaner's bag or canister.
By burning it, which produces heat
In each transformation of energy, some energy is lost as heat due to inefficiencies in the conversion process. This is known as waste heat and cannot be fully converted into useful work.
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A dryer produces thermal energy transformation, converting electrical energy into heat to dry clothes by increasing their temperature and aiding in the evaporation of water.
In any energy transformation, some energy is always lost as heat due to inefficiencies in the system, such as friction and resistance. This wasted energy is not able to be converted into useful work and is typically dispersed into the environment.
electrical/chemical to sounds(useful energy) and heat(wasted energy)
The energy transformation occurring when a phone vibrates involves electrical energy being converted to kinetic energy. The phone's vibrator motor is powered by electricity and produces mechanical vibrations, causing the phone to vibrate.
In a firecracker, energy transformation occurs when the chemical potential energy stored in the gunpowder is converted into thermal energy (heat) and light energy (in the form of the explosion and sparks). This transformation happens rapidly and produces a loud sound due to the expanding gases pushing outward.
In Figure 50.3, the orientation of the current in the wire produces a transformation of electrical energy into magnetic energy. The flow of current generates a magnetic field around the wire, leading to the conversion of electrical energy to magnetic energy.
The useful energy in a light bulb is the light that it emits. When electricity flows through the filament of a light bulb, it produces light energy that we can see and use for illumination.