@Joel1,
When rigid objects , like glasses, are struck, they vibrate at particular frequencies according to their structure. If sound waves of the same frequency as their own hit those objects, they vibrate 'in sympathy' with the sound. This is resonance.
Electrical circuits can be 'tuned' to radio waves' which are electro magnetic vibrations in a particular frequency range. This is because their circuits contain components called inductances and capacitors which can be altered to keep exchanging magnetic and electrical effects between them like a swinging pendulem.
Electromagnetic waves include 'light' (which resonates components in our eyes) and infra red (which we feel as heat when it resonates our skin sensors)
Microwave cookers resonates water molecules in food such that vibrations heat the food which contains them.