Does a hot or cold object weigh more?

A cold object is more dense.

Heat flows from hot objects to cold.

A hot object emits more radiation from each unit of its surface area than a cold one does.

heat travel from a hot object first then to cold object!

Energy ALWAYS flows from a hot object to a cold object.

Heat "travels" from hot to cold, always.

the mass is the same. so neither Liquids Weighs MORE when cold as it is more dense

wow what a question!! well i don't know but hot air rises so cold would probably weigh more..

Heat moves to cold - which warms the cold object up, but cools the hot object down.

Cold water weighs more than hot water. Water is most heavy at 4 degree Celsius.

The mass remain constant.

We perceive an object as hot or cold according to how fast its particles are moving. The faster they move, the hotter the object.

Temperature is the quantity that describes how hot or cold an object is. A thermometer does a fine job of measuring it.

Energy moves from hot to cold. Cold is a lack of energy so energy can not flow from a colder object to a warmer object.

It's very likely that heat flows from the hot object to the cold object, and their temperatures tend asymptotically toward the same number.

Heat will flow from a hot object to a cold object until the objects reach the same abount of heat .

no cold air is heavier because it sinks and hot air rises

It's simple thermodynamics. In the case of conduction (where two objects are touching each other), the molecules of the hot object contact the molecules of the cold object, and energy is transferred from the hot molecule to the colder one (remember, the hot object is hot because its molecules have more energy). This process continues until all of the molecules have the same energy (are the same temperature).

A hot object must be directly touching a cold object.

Heat(Hot) makes a object expand or get bigger. Cold makes a object shrink or get smaller.

It is denser because the molecules are closer together.

No. You don't weigh more or less on a hot or cold day.

When one object is hotter than another, heat will be transferred from the hot object to the cold object. The hot object will cool down, and the cold object will heat up, until they are the same temperature.

It flows from the hot object to the cold object.

Temperature is the average Kinetic energy of molecules in an object. A hot object has more kinetic energy and a cold object has less kinetic energy.