How do spring tides and neap differ and what causes each type of tide

answer:

spring tides occur when the sun and moon are aligned (full moon and new moon) causing higher high tides. this occurs twice in a month. figure 2.14: figure showing the positions of the sun, moon, and earth during quadrature. neap tides occur when the sun and moon are acting on the earth in opposing direction.

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from google

b.a device that inputs heat into a cool object

f=ma newton

f=100x2.5=250n