Work = Force x Distance = 500 x 4 = 2000 Nm = 2000 J
A boiling pot of water (the water travels in a current throughout the pot), a hot air balloon (hot air rises, making the balloon rise) , and cup of a steaming, hot liquid (hot air rises, creating steam) are all situations where convection occurs.
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It runs slower <span>as gravity is lower so acceleration due to gravity is smaller</span>
