While John is traveling along a interstate highway he notices that the mile marker reads 242 km. John travels until he reaches the 147km marker and then retraces his path to the 161 km marker. What is the John's resultant displacement from the 242 km marker answer in units km

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell