An astronaut is traveling in a spacecraft in outer space in a straight line at a constant speed of 0.500c. Which of the following effects would she experience? (a) She would feel heavier. (b) She would find it harder to breathe. (c) Her heart rate would change. (d) Some of the dimensions of her spacecraft would be shorter. (e) None of those answers is correct.
PHYSICS 1321 CHAPTER 12 –FLUID MECHANICS 1. Density (ρ) Very important property of material , fluid or solid. 2 or more objects can have same density despite having different masses and volume if they are made of the same material. Mass per unit volume 3 SI unit : kg/m ρ=m/V 2. Pressure in fluid (p) It is the force exerted per unit area. The force exerted is perpendicular to any surface. Scalar Quantity SI unit : 1 Pa = 1 N/m 2 p=(dF)/(dA) 3. Pressure at depth in a fluid Pressure at depth is greater than pressure p whic0 is at surface p=p +0ρgh --------- (1)