True or false: 1. an object can have only one type of energy at a time 2. if an object has energy, it must be moving. 3. all energy travels in waves.

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.