Contents and methods of law: 1. Rotate the law of production relations in accordance with the level and nature of production development
2. The law of the dialectical relationship between infrastructure and superstructure

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

dang that balls went far

prndulum needs thread, weight clock to time swings