Magnetism is a class of physical phenomena that are mediated by magnetic fields. Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments. Magnetism is one aspect of the combined phenomenon of electromagnetism.
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i don't ?now about this one tbh
They could place the cup under a large tree because the tree can provide shade from the sun, which will help cool the water down.
