strengthen
an object can be cooled by air or by a fridge or freezer.
If an object is cooled, the particles within the object will lose kinetic energy and move closer together. This results in an increase in the density of the object because the same mass is now packed into a smaller volume.
weaken
[object Object]
thermal energy
i dont not i would like to now that to
are formed by electrons that are delocalized throughout the object bonded by the metallic bonds.
because
It's transferred - so something gets warmer.
Nothing happens to the mass when its cooled (or heated).Mass is the same (law of Conservation of Mass).Volume can change, though, which affects density (since mass is constant).
when objects are heated they gaining energy and the molecules begin to vibrate and bounce off each other, causing them to get farther apart, the opposite is true when an object is "cooled" ( i air quote cooled because in truth the word cold is somewhat unnecessary as you can heat can be gained, but there is no such thing as gaining cold only losing heat, so a better word would be something like "unwarm", or in this case "unheated").
Density usually changes when an object is heated or cooled - especially in the case of gases, or when there is a change of phase.