Step-by-step explanation:
generally, we can know that energy has traveled from us to our friends if there is a change in their energy state or they have experienced some kind of physical or emotional response to our actions. For example, if we tell a joke and our friends laugh, we have transferred energy in the form of sound waves from our vocal cords to their ears and stimulated a response in their bodies. Similarly, if we give our friends a hug, we apply energy to their bodies in the form of force and warmth. The medium that energy travels through can vary depending on the type of energy being transferred. For example, sound energy travels through the air or other materials that can vibrate, while light energy travels through the air or a vacuum in the form of electromagnetic waves.