Ferromagnets, or "permanent magneis", are most common ways we encounter magnetism in eiu'erg..rcia1|..r circumstances. Choose the statements below which correctly.r describes how ferromagnets work. 0 Ferromagnets are pieces of Ea rth's magnetic core that has broken off and drifted to the upper crust over millions of years. 0 A source of energy is needed to power the magnetic fields generated by the ferromagnets. O Ferromagnets can be produced by hard blows or heating certain materials in a strong magnetic field. 0 Ferromagnets contain an imbalance of magnetic poles [more north poles than south poles, or vice versa}, which produces magnetic fields. Which has the higher frequency, red light or blue light? {'3' Blue 0 They heth have the same frequency, but they have different wavelengths. 0 Red O They bdth have no frequency, but they have different magnitudes of energy