Why do heated objects weigh less

Is there a physical, theoretical limit to how accurately one can measure the speed of light? Is the mass energy equivalence correct? What is the physics of ironing? Quora, Contributor. Suggest a correction. What's Hot. More In Science. This effect can give significant errors even when the object is only a few degrees above room temperature.

From what I remember it was because the cooling causes air currents which would effect the accuracy of the measurement. Convection would apply force on the weighing surface. A hot object will expand and possible weigh more or less according to the material and lab conditions as it cools. Liquid is another example which will weight more in the liquid stage than in the gas stage in the same closed container.

Some metals change densitiy when heated and will weight less. Hot objects would warm the air around it. A warm air would expand and would produce convection as it rises causing to give the object a mass that is less than the actual. Hot objects will give erroneously lower readings due to air buoyancy, while cold objects will give higher readings due to the condensation of water vapor.

The error that is introduced in a mass determination if the object being weighed iswarm is a weight error. This is caused by the fact that warm objects tend to cause the air around them to rise which leads to the balance scales to detect this and givea less mass determination of the object. By heating it first, you are evaporating off the thin layer of water that is on the dish. This ensures a more accurate measurement of your final product. Therefore, when you mass a piece of glassware, you are also massing a small amount of water that is on that glassware.

Make sure you grab the crucible on the edge as shown. There is also the possibility of breaking a hot crucible that way. Heat the crucible until it attains red heat.

Though the kinetic energy of the particles that make the system increases, the system is at rest when you heat the object the object doesn't start moving. Hence, from the equation I wrote above the energy you provide get added as mass of object. A perfectly reflecting wall massless box has mass when photons are randomly moving inside the box. Sign up to join this community.

The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Will heating up an object increase its mass? Asked 6 years, 11 months ago. Active 6 years, 3 months ago.