The spiral spring of a spring balance is 25.0cm long when 5N hangs on it and 30cm long when the weight is 10N , what is the length of the spring , if the weight is 3N assuming Hooke's law is obeyed ?​

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.