Ayuda Porfavor es URGENTE

A-4.60 μc charge is moving at a constant speed of 6.80×105 m/s in the +x−direction relative to a reference frame. at the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points.

Which statement correctly describes the relationship between frequency and wavelength?

When an object is heated it contracts. a. true b. false