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.
Items that we can physically touch are called tangible objects. These objects have a physical presence and occupy space, allowing for sensory interaction through touch. Examples include furniture, books, and electronic devices. In contrast, intangible items, like ideas or digital content, cannot be physically touched.
Rough and smooth would be the two basic textures.
Contact area
yes. Anything that you can physically touch is a noun
touch
Australia is a continent and island.