Un bote atraviesa un rio de 50 metros de ancho en direccion perpendicular a la corriente. Si la velocidad del bote respecto al agua es de 4m/seg y se mueve 20 metros aguas abajo. Calcular : la velocidad de la corriente

While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.