I have been trying to help people across the world with their basic science questions.
This one had me stumped at first . My actual reply is below. What would you have said? Perhaps your child has already asked this question,
My reply.
In science when you ask any question you deserve an answer. Sometimes in does not add much to the sum of Human knowledge, but keep asking.
My attempt. This is simply a transfer of dirt from the dirty object to and with the water which then clings more solidly to the towel. The water will actually dissolve some of the dirt and transfer as a solution to the towel which then has to be removed in the washing machine.
Would have said essentially the same thing. Soap is a lubricant that looses dirt, whereas the cloth of the towel absorbs it. It is a transference process.
But why do people sometimes find it difficult to find for themselves an answer like that? . Is it just lack of knowledge or what?
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