What is obliquity in earth's orbit?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

6–48 bananas are to be cooled from 24 to 138c at a rate of 215 kg/h by a refrigeration system. the power input to the refrigerator is 1.4 kw. determine the rate of cooling, in kj/ min, and the cop of the refrigerator. the specific heat of banana above freezing is 3.35 kj/kg·8c.

How to calculate voltage drop in a series circuit