Question 1 (1 point) Which of the following is NOT a unit of pressure? O kg/m2 O Pa Pounds per square inch (psi) mm Hg Question 2 (1 point) The pressure on a mercury barometer reads (7.49x10^2) mm Hg. What is this pressure in Pascals? use 3 sf in your answer. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer Question 3 (1 point) Calculate the buoyant force in newtons on the spherical balloon, assuming a radius of (9.2x10^0) metres. The density of air is 1.29 kg/m3