Aforce used to lift a 25kg mass to a height of 12m in 5 sec does 2100j of work. how much force is used

What causes the formation of ocean currents?

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

Which magnetic property best describes a magnet’s ability to act at a distance? magnets are dipolar. magnets attract only certain objects. magnets have magnetic fields. magnets can transfer their properties to certain materials.