a. Is air a fluid? Justify your answer in one sentence. b. What is the difference between UNITS and Dimensions? c. What is the physical meaning of temperature? d. What is the physical meaning of pressure? e. What is the meaning of density? f. At a given pressure: what happens to the density of fluid if the temperature increases Explain why using physical temperature definition. g. At a given temperature: what happens to the density of fluid if the pressure decreases Explain why using physical pressure definition. h. Give two mechanisms to obtain vapour from a liquid. i. When does the ideal gas law fails? Explain why? j. Newton was the first to compute the speed of sound in air: He made a wrong assumption What was his wrong assumption? What should be the most accurate assumption t compute the speed of sound? k. In one sentence, describe how sound propagates? Why is the sound speed faster in wate than in air? 1. Are liquids incompressible? If YES, name any fluid that is incompressible? Justify you answer. m. What is the physical meaning of viscosity? n. Why there exists surface tension at the free surface of a water cup? o. What is capillary action? Why does it occur?