PLEASE HELP. a submarine took 9 hours to complete a journey. for the first 5 hours, it travelled at an average speed of 106 km/h. for the rest of the journey, it travelled at an average speed of 125 km/h. what was the total distance of the journey ? ___km

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.