What is a physical property that shows how strongly the particles of a substance are held together?

Kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energy b. motion energy c. sound energy d. thermal energy

In a system, when potential energy decreases, then entropy also decreases. true false

Anybody wanna ? (picture included? )