The answer is a sponge. When dry, it weighs 2 kg; when wet, it absorbs water and becomes heavier, weighing 1 kg; when burnt, it loses moisture and burns away, leaving ash behind that weighs 3 kg.
The item weighs 2kg when dry but only 1kg when wet, suggesting that 1kg of water weight is lost when the item gets wet. When the item burns, it should weigh 3kg, which means it gains an additional 2kg during the burning process.
Wet, moist, damp
Water isn't wet by itself, but it makes other materials wet when it sticks to the surface of them.
When sugar is wet, it absorbs some of the water, increasing its volume but not its weight. This can create the illusion that wet sugar is lighter when measured by volume, but its actual weight remains the same as dry sugar.
Hydrophobic material, they repel water.
For a start, kilogram is a unit of mass, not of weight.
It is only a metal that is 2kg when burnt will be 3kg because of the resulting metal oxide.
When the metals are burnt in air they usually measure more because of the metal oxides formed.
Sulfur
SULFUR
with air ,a dryer.
Sulphur :)
When the metals are burnt in air they usually measure more because of the metal oxides formed.
The object is a sponge. It weighs 2kg when dry, 1kg when wet (due to water absorption), and 3kg when burned (due to the release of gases and combustion byproducts).
Dry concrete weighs more than wet sand because concrete is denser and more compact than sand, even when wet. Concrete is composed of cement, sand, gravel, and water, which results in a heavier material compared to sand alone.
I weighs less and can be used upside down.
About 1.2 pounds of dry sand equals 1 pound of wet sand. When sand is wet, it typically weighs more due to the water content.