What is an example of the electromagnetic force

The carbon granules in the receiver in your telephone changes the sound of your voice into electrical signals. These electrical signals travel through the wires from your home to that of whoever may be on the other side of the line where a magnet in their telephone receiver changes the electrical signals back into the sound of your voice.

the core of the sun is so hot and there is so much pressure, nuclear fusion takes place, hydrogen is changed to helium. nuclear fusion creates heat and photons. when the heat reaches the earth it warms the molecules of the atmosphere, and they warm other molecules and so on.

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.