Because Any object or substance that is less dense than a fluid will float in that fluid, so hot water rises (floats) in colder water. When fluids are cooled, they contract and therefore become more dense. Any object or substance that is more dense than a fluid will sink in that fluid, so cold water sinks in warmer water
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Yes because something that has been electrically charged can make other things move without touching them ( this is called force without contact)
Hoped this helped :)
It’s true the acceleration of falling objects on earth due to gravity is 98ms2
