किसी विकृत पिंड के अंदर प्रति इकाई क्षेत्रफल में उत्पन्न आंतरिक प्रत्यानयन बल (restoring force) को ________ के रूप में जाना जाता है।

When a bottle of perfume is kept open in a corner of a room, its fragrance is soon felt in all parts of the room. This occurs due to which phenomenon?

The quantity of matter contained in a substance is termed as:

What is the ability of a material, particularly a metal, to resist surface wear, scratching, and abrasion called?