question: What is used to measure the force acting on a unit area?
choices.text: weater hormones inches a compass potassium a thermometer a barometer a ruler
choices.label: A B C D E F G H
fact2: Air pressure Pressure is the force acting on a unit area.
combinedfact: A barometer is used to measure the force acting on a unit area.
formatted_question: What is used to measure the force acting on a unit area? (A) weater (B) hormones (C) inches (D) a compass (E) potassium (F) a thermometer (G) a barometer (H) a ruler