Help me plz ASAP! Ty boys and girls

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

__1__ is a climate cycle where the temperature of the __2__ ocean changes because of movements of air and ocean currents. during this period, the trade winds in the south __3__ , causing the __4__ water to move from the __5__ region to the __6__ region. 1) el nino or the monsoon 2) atlantic, indian, or pacific 3) reverse, strengthen, or weaken 4) cold or warm 5) eastern or western 6) eastern or western

Why does bubbling occur when vinegar mixed with baking soda