सामग्री के दिए गए अनुप्रस्थ काट (cross-section) के समानांतर कार्य करने वाले प्रतिबल (stress) को ________ के रूप में परिभाषित किया 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?