Why does the light bulbs have to be part of the loop in order for it to be succesful?

According to the tide table below what time of day will the highest tide occur?

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong

How many moles of bromine are needed to produce 3.23 moles of potassium bromide