Describe what happens to the particles of a liquid, in terms of movement and kinetic energy, as it is heated to its boiling point, including whether this is a physical or chemical change.

Which of the following is an example of how telecommunication devices people do their jobs? a.) a security guard checks the time using a digital watch. b.) a banker does some quick math using a solar calculator. c.) a nurse uses a digital thermometer to take a patient’s temperature. d.) a construction worker reports in to his office using a cell phone.