Describe how and why molecular movement and position will change when heat is added.

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Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2