In which one of the following locations can a person hear the echo of a sound? a. at least 33.2 meters behind the reflecting surface b. at least 16.6 meters in front of the reflecting surface c. less than 16.6 meters in front of the reflecting surface d. less than 33.2 meters behind the reflecting surface

Which of the following statements are true for an isothermal process? check all that apply. - during an isothermal process, the work done by the gas equals the heat added to the gas. - during an isothermal process, the internal energy of the system changes. - an isothermal process is carried out at constant temperature. - an isothermal process is carried out at constant pressure. - an isothermal process is carried out at constant volume.