Weight difference between liquid and dry?

Liquids weigh less than their dry counterparts because liquids contain air bubbles. Air is less dense than water, so when it's trapped inside dry ingredients, it makes the overall weight of the food lighter. For example, a cup of dry flour weighs more than a cup of liquid milk, even though they contain the same volume. This difference in weight is because of the air bubbles that are trapped inside the flour. When the flour is poured into a cup, the air bubbles are released, which causes the flour to settle and become more compact. This makes the flour weigh more than the milk, which does not contain any air bubbles.

Here are some other examples of liquid foods that weigh less than their dry counterparts:

- A cup of milk weighs less than a cup of dry milk powder.

- A cup of juice weighs less than a cup of dry fruit juice powder.

- A cup of soup weighs less than a cup of dry soup mix.

The difference in weight between liquids and solids can be important to consider when cooking. For example, if you're using a recipe that calls for a certain weight of flour, you need to make sure you're weighing the flour before adding it to the recipe. If you use a cup measurement instead, you could end up adding too much flour to the recipe, which could make the dish too dense.

It's also worth noting that the difference in weight between liquids and solids can change depending on the type of food and the amount of air that's trapped inside. For example, a cup of wet sand will weigh more than a cup of dry sand, because the wet sand contains more water molecules. Similarly, a cup of freshly squeezed orange juice will weigh more than a cup of orange juice that's been sitting out for a while, because the freshly squeezed juice contains more air bubbles.