If something is tangible it means you can touch it. Everything at McDonald's would be considered tangible because you can physically touch the objects in the restaurant.
Light is intangible, meaning you cannot physically touch it.
Software.
You get "in touch" with your Guardian Angel through prayer. You cannot physically touch an angel as they are pure spirit.
Hardware
No, atoms do not physically touch each other because they are surrounded by electron clouds that repel each other due to electromagnetic forces.
Rough and smooth would be the two basic textures.
yes. Anything that you can physically touch is a noun
Contact area
touch
Australia is a continent and island.
PDA is where you are physically touching someone and an ipod touch is a device where you can listen to music