Dos policias de caminos que se encuentran en reposo repecto a la carretera estan separados por una distancia de 70 km. Pasa un coche por la pocision del primero, quien le avisa a su compañero por radio. Media hora despues, el coche pasa frente al segundo policía. Si el limite de rapidez para transitar por esa carretera es de 110 km/h, ¿puede saberse si el vehículo ha superado dicho limite¿

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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.

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.