If something is Tangible it simply means it is a solid object that can be felt, touched. Emotions, sentiments, thoughts etc cannot so therefor are not tangible.

Discernible by the touch; palpable: a tangible roughness of the skin.

Possible to touch.

Possible to be treated as fact; real or concrete: tangible evidence.

Possible to understand or realize: the tangible benefits of the plan.

Law That can be valued monetarily: tangible property.

NOUN:

Something palpable or concrete.

tangibles Material assets.

Examples of speech choices:

A good topic for a tangible speech would be the current volcanic activity in the Caribbean or the odd objects in the air over Peru.

capable of being precisely identified or realized by the mind

capable of being appraised at an actual or approximate value