microwave oven-electrical to heat
stove-chemical to heat
windmills mechanical to electrical
firecracker-chemical to heat and sound
Examples of energy conversion include converting solar energy into electricity through solar panels, converting chemical energy in food into mechanical energy in the body during physical activity, and converting electrical energy into light energy in a light bulb.
Some rare examples of energy conversion include converting mechanical energy directly into electrical energy through piezoelectric materials, converting heat energy into electricity using thermoelectric generators, and converting sound energy into electrical energy using specialized materials like piezoelectric crystals.
Energy is converted or transformed in various natural and man-made processes. Examples include the conversion of sunlight into chemical energy through photosynthesis in plants, the transformation of electrical energy into light and heat in a light bulb, and the conversion of potential energy into kinetic energy in a moving car.
Examples of energy transfer in different systems and processes include the conversion of sunlight into chemical energy through photosynthesis in plants, the transfer of heat energy from a hot object to a cooler one through conduction, and the transformation of electrical energy into light and heat energy in a light bulb.
In any energy conversion process, some of the original energy is always lost as heat energy. This heat energy is often a byproduct of the conversion process and cannot be fully utilized to perform work.